Hybrid multiple-input multiple-output antenna module and system thereof

Composite multiple input multiple output antenna module and its system

This creation is related to a multiple-input multiple-output antenna, especially a hybrid multiple-input multiple-output antenna module and its system.

Traditional wireless local area network or 802.11a/b/g/n bridge point antennas are mostly exposed antenna structures, and the most common form is a dipole antenna covered with a plastic or rubber sleeve. This type of antenna is usually a single-frequency 2.4GHz or dual-frequency 2.4/5GHz antenna. The height of the antenna body is usually three times the thickness of the wireless broadband router or hub, and the antenna body is set on the side of the wireless broadband router or hub and is exposed. Above the case. The user needs to install the antenna first, and then adjust the antenna receiving position. The antenna is also easily damaged by external forces, takes up space and damages the appearance, especially when applied to wireless communication devices.

In addition, when applied to 2.4/5GHz wireless local area network or 802.11a/b/g/n dual-band antenna, most of the antenna only has a single signal feed point. The typical design of dual-frequency antenna is a dual-frequency dipole bridge contact antenna structure. This antenna uses two radiating copper tubes, which is different from the traditional single-frequency dipole antenna which uses the center conductor of the coaxial transmission line to achieve 2.4/5GHz dual-frequency operation. However, in the case of concurrent dual-band operation, an additional diplexer circuit is required to synchronously transmit/receive 2.4GHz and 5GHz band signals to 2.4GHz and 5GHz modules, which not only increases the cost, but also causes Overall system power loss.

In addition, the prior art also discloses a dual-frequency cross-polarized dipole antenna, which discloses a dual-antenna system including two dual-frequency dipole antennas to generate two operating frequency bands, which are in the vicinity of 2.4 GHz and 5 GHz modes, respectively. However, because the dual antennas are stacked, the overall antenna system is also in a high profile.

The disadvantage of the above-mentioned prior art is that the above-mentioned related art antenna structure requires an additional plastic or rubber sleeve to be sleeved on the periphery of the antenna from mass production to practical application, thereby increasing the manufacturing cost of the antenna. In addition, this type of antenna cannot be concealed in a general wireless broadband router or hub, that is, the antenna needs to be exposed outside the casing of the wireless communication device. Therefore, the conventional structure greatly reduces the overall appearance and aesthetics of the product.

Furthermore, common enterprise-level wireless broadband bridge points or routers are usually installed on the ceiling, and the radiation field coverage of the antenna directly affects the user's receiving (downlink) and sending (uplink) quality . Compared with the 2.4GHz band operation, the 5GHz antenna has a higher frequency, which results in a greater attenuation of electromagnetic waves within the same propagation distance. Therefore, the gain of the 5GHz antenna needs to be increased to compensate for the influence of path loss.

The reason is that this creator feels that the above-mentioned shortcomings can be improved, carefully observed and studied them, and cooperated with the use of academic principles, and proposed a rational design and effective improvement of the above-mentioned shortcomings of the original creation.

The technical problem to be solved by this creation is to provide a composite multiple-input multiple-output antenna module, which has small size, low height, small isolation between antennas, high antenna gain, and good radiation characteristics. An additional duplexer circuit can replace the traditional exposed 2.4/5GHz dual-band access-point antenna. In addition, the composite multi-input multi-output antenna module of the invention can be embedded in a wireless broadband router or hub to maintain the integrity and aesthetics of the overall appearance of the product.

In order to solve the above technical problem, according to one of the solutions of the present creation, a composite multiple input multiple output antenna module is provided, which includes: a ground unit, multiple radiation units, multiple loop units, and multiple filter units. The radiating units are arranged on the grounding unit, and each radiating unit has a first radiating body parallel to the grounding unit and extending toward the outer side of the grounding unit, and at least one side from the first radiating body A first signal feed-in pin that extends downwardly and is suspended, and at least one first short-circuit pin that extends downwardly from one side of the first radiating body and is connected to the ground unit, and Both the first signal feed-in pin and the first short-circuit pin and the first radiating body are arranged on different planes. The loop units are arranged along the outer side of the ground unit and are vertically disposed on the ground unit, wherein each loop unit has at least one second short-circuit pin provided on the ground unit, and at least one of At least one second short-circuit pin is separated by a predetermined distance and suspended above the grounding unit for a predetermined distance, and at least one suspended and vertically arranged above the grounding unit for a predetermined distance and connected to the at least A second short-circuit pin and the second radiating body between the at least one second signal feeding pin. The filter units are arranged on the ground unit and are respectively electrically connected to the second signal feeding pins of the loop units. In addition, the radiation units and the loop units all surround the geometric center of the ground unit and are alternately and symmetrically arranged on the ground unit.

In order to solve the above technical problems, according to one of the solutions of the present creation, a composite multiple-input multiple-output antenna module is provided, which is installed inside a casing of a wireless communication device to form a composite multiple-input multiple-output antenna modulesystem. The system. The composite multiple-input multiple-output antenna module includes: a ground unit, multiple radiation units, multiple loop units, and multiple filter units. The radiating units are arranged on the grounding unit, and each radiating unit has a first radiating body parallel to the grounding unit and extending toward the outer side of the grounding unit, and at least one side from the first radiating body A first signal feed-in pin that extends downwardly and is suspended, and at least one first short-circuit pin that extends downwardly from one side of the first radiating body and is connected to the ground unit, and the Both the first signal feed-in pin and the first short-circuit pin and the first radiating body are arranged on different planes. The loop units are arranged along the outer side of the ground unit and are vertically disposed on the ground unit, wherein each loop unit has at least one second short-circuit pin provided on the ground unit, and at least one of At least one second short-circuit pin is separated by a predetermined distance and suspended above the grounding unit for a predetermined distance, and at least one suspended and vertically arranged above the grounding unit for a predetermined distance and connected to the at least A second short-circuit pin and the second radiating body between the at least one second signal feeding pin. The filter units are arranged on the ground unit and are respectively electrically connected to the second signal feeding pins of the loop units. In addition, the radiation units and the loop units all surround the geometric center of the ground unit and are alternately and symmetrically arranged on the ground unit, and the ground unit, the radiation units, the loop units and the ground unit are arranged alternately and symmetrically. These filter units are all covered inside the casing of the wireless communication device.

Therefore, the beneficial effects of this creation are:

1. In the example in this creation, the composite multiple-input multiple-output antenna module contains three independent radiating units (such as three monopole antennas) and three independent loop units (such as three loop antennas). ). Each radiating unit and each loop unit are respectively responsible for low-frequency 2.4GHz band operation and high-frequency 5GHz band operation to achieve the purpose of simultaneous dual-frequency operation. Therefore, this creation is different from the traditional dual-band antenna. The traditional dual-band antenna has only a single signal feed-in terminal, and an additional duplexer circuit is required for synchronous dual-band operation. This not only increases the cost, but also causes the overall system power loss.

2. In the example in this creation, each radiating unit can be a shorted monopole antenna, and each loop unit can be a loop antenna. This creation combines the above two different antenna types And antenna radiation field characteristics to form a composite multiple-input multiple-output antenna module.

3. In the example given in this creation, the overall height of the composite multiple-input multiple-output antenna module does not exceed 15mm to achieve the possibility of a built-in multiple bridge contact antenna. In other words, the composite MIMO antenna module of this invention can be built into a wireless broadband router or hub to maintain the integrity and aesthetics of the overall appearance of the product.

4. In the example given in this creation, by (1) controlling the distance between the first short-circuit pin and the first signal feeding pin of each radiating unit, (2) controlling the second of each loop unit The distance between the short-circuit pin and the second signal feed-in pin, and (3) control the height of each radiating unit and each loop unit relative to the ground unit, so that the composite multi-input multi-output antenna module of this creation Obtain good impedance matching (defined by 2:1 VSWR or 10dB return loss) in the 2.4GHz and 5GHz wireless local area network frequency bands.

5. In the example in this creation, because the first short-circuit pin of each radiating unit is adjacent to the second signal feed-in pin of the loop unit of different antenna operating frequencies (or the second short-circuit of each loop unit) The pin is adjacent to the first signal feeding pin of the radiating unit with different antenna operating frequencies), so this creation can greatly reduce the mutual coupling between every two radiating units with different antenna operating frequencies and the loop unit. In order to achieve the good characteristics of isolation (isolation) below -20dB.

6. In the example given in this creation, each radiating unit (such as a 2.4GHz monopole antenna) can provide a conical radiation field pattern, which is suitable for the design of ceiling bridge-point antennas. In addition, each loop unit is a full-wavelength loop antenna (one-wavelength loop), and is a balanced structure, which has the ability to greatly suppress the surface excitation current of the antenna ground plane (or system ground plane). Advantages, so the ground plane (the ground unit) can be regarded as a reflector here, so that the antenna radiation pattern of this creation has a higher directivity, so as to achieve a high-gain antenna design (which can compensate for the 5GHz operating frequency band) High path loss) and improve the communication coverage.

7. In the example given in this creation, each loop unit is placed vertically on the edge of the ground plane (that is, the outermost side of the ground unit), and the radiation field pattern of the antenna is affected by the two orthogonal directions of the ground plane ( orthogonal directions) (one direction is perpendicular to the ground plane (parallel to the antenna), the other direction is parallel to the ground plane) reflection, each loop unit in the 3dB half-power beam diameter of the plane perpendicular to the antenna can be The angles above at least one quadrant on the polar coordinate are covered, so each loop unit can generate a wide beam diameter and wide radiation field pattern.

8. In the example given in this creation, the grounding unit and the loop units are integrally made by stamping or cutting metal sheets, and can be formed by a single radiating metal sheet, so this creation can effectively save production costs and processing time.

9. In the example in this creation, each 2.4GHz printed microstrip band-stop filter is electrically connected to the second of each loop unit (for example, a 5GHz loop antenna). The signal feed point is used to suppress the half-wavelength resonance mode of the 5GHz loop antenna (close to the 2.4GHz operating band), thereby greatly reducing the isolation between the 2.4 and 5GHz antennas in the 2.4GHz band to -45dB. Therefore, the gain value of this creation in the 2.4GHz band is about 4.6dBi, and the antenna radiation efficiency can be greater than 80%. In addition, the gain value of this creation in the 5GHz band is about 4.4~5.1dBi, and the antenna radiation efficiency can be More than 75%.

In order to further understand the features and technical content of this creation, please refer to the following detailed description and drawings about this creation. However, the attached drawings are only for reference and explanation, and are not used to limit this creation.

Please refer to the first A to the first D, the first embodiment of this creation provides a composite multiple-input multiple-output antenna module M, which includes: a ground unit 1, a plurality of radiating units 2, a plurality of loops Circle unit 3 and multiple filter units 4. In addition, the ground unit 1 and the loop units 3 may be integrally formed sheet-shaped bodies. Of course, the loop units 3 can also be formed separately and then arranged on the ground unit 1.

The radiation units 2 and the loop units 3 all surround the geometric center of the ground unit 1, and the radiation units 2 and the loop units 3 are alternately and symmetrically arranged on the ground unit 1. The geometric center line A of each radiating unit 2 (the geometric center line A is connected to the geometric center of the ground unit 1) and the geometric center line B of each loop unit 3 (the geometric center line B is connected to the ground unit 1) The angle θ between each other is the same. In addition, the angle θbetween the two geometric center lines A of every two radiating elements 2 (or the two geometric center lines B of every two loop elements 3) can also be the same.

For example: Taking the example given in the first embodiment of this creation, the number of the radiating units 2 is three, the number of the loop units 3 is also three, and the geometric centerline of each radiating unit 2 The angle θ between A and the geometric center line B of each loop unit 3 is 60 degrees (as shown in the first A). However, the above-mentioned "the number of the radiating elements 2 and the loop elements 3" and the "degrees of the included angle θ between the geometric centerline A of each radiating element 2 and the geometric center line B of each loop element 3" "All are used as examples, not to limit this creation.

Furthermore, the grounding unit 1 can be a regular polygonal conductive plate body, a circular conductive plate body, or a conductive plate body of any appearance shape. The first embodiment of the present creation is illustrated with a regular polygonal conductive plate body, and the ground unit 1 has a perforation 10 at the center (ie, at the geometric center). In addition, the composite multiple input multiple output antenna module M of the present creation further includes: a plurality of signal transmission lines 5 corresponding to the radiating units 2 and the loop units 3, and the signal transmission lines 5 pass through the perforation 10, so that the signal transmission lines 5 can pass through the perforation 10 to achieve the storage effect, and through the use of the signal transmission lines 5, the antenna signals received by the radiating units 2 and the loop units 3 can be Passed to the circuit board (not shown) in the wireless broadband router (router) or hub (hub). Of course, the ground unit 1 in the first embodiment of the present creation can also omit the design of the above-mentioned perforation 10, so that the signal transmission lines 5 are directly attached along the upper surface of the ground unit 1, which can also make the signal transmission lines 5 Achieve the effect of storage.

In addition, as shown in the first B and C, the radiating units 2 are arranged on the ground unit 1 and the radiating units 2 are at a predetermined distance from the outer side 100 of the ground unit 1, and each of them The radiating unit 2 has a first radiating body 22 parallel to the grounding unit 1 and extending toward the outer side 100 of the grounding unit 1, and at least one second radiating body 22 extending downward from the side of the first radiating body 22 and suspended in the air A signal feed-in pin 21 and at least one first short-circuit pin 20 extending downward from the side of the first radiating body 22 and connected to the ground unit 1. In other words, one side of the first radiating body 22 extends toward the outer side 100 of the ground unit 1, and the other opposite side of the first radiating body 22 extends downwards out of the first signal feed-in connector The pin 21 and the first short-circuit pin 20, wherein both the first signal feed-in pin 21 and the first short-circuit pin 20 and the first radiating body 22 are arranged on different planes. In other words, both the first signal feed-in pin 21 and the first short-circuit pin 20 can be coplanar, and the first signal feed-in pin 21 and the first radiating body 22 are non-coplanar, and the A short-circuit pin 20 and the first radiating body 22 are non-coplanar.

In addition, as shown in the first B and D, the loop units 3 are arranged along the outer side 100 of the ground unit 1 and are vertically disposed on the ground unit 1, wherein each loop unit 3 There is at least one second short-circuit pin 30 disposed on the ground unit 1, and at least one second signal feeder that is separated from the at least one second short-circuit pin 30 by a predetermined distance and suspended above the ground unit 1 by a predetermined distance The input pin 31, and at least one suspended and vertically arranged above the ground unit 1 a predetermined distance and connected to the at least one second short-circuit pin 30 and the at least one second signal feeding pin 31 of the second Radiation body 32. Please refer to FIG. 1 D, the second short-circuit pin 30 and the second signal feed-in pin 31 of each loop unit 3 are symmetrically arranged on both sides of the geometric center line B of each loop unit 3.

In addition, the filter units 4 are all disposed on the ground unit 1 and closely adhere to the ground unit 1 in parallel, and are electrically connected to the second signal feed-in pins 31 of the loop units 3, respectively. To filter the transmission signal of a specific frequency. Each filter unit 4 has a first section of transmission line 41, a second section of transmission line 42 and a microwave printed filter 43 connected between the first section of transmission line 41 and the second section of transmission line 42, wherein the first section The section of transmission line 41 is electrically connected to the second signal feed-in pin 31 of the loop unit 3, and the second section of transmission line 42 is electrically connected to the signal transmission line 5. For example, each filter unit 4 can be a band-stop filter for suppressing the half-wavelength resonance mode of the loop unit 3, because the half-wavelength resonance mode of the loop unit 3 It is close to the antenna operating frequency of the radiating elements 2. Taking the example given in the first embodiment of this creation, the radiation units 2 are 2.4 GHz, the loop units 3 are 5 GHz, and each filter unit 4 can be a 2.4 GHz printed microstrip rejection filter ( printed microstrip band-stop filter), which is electrically connected to the second signal feed point 310 of each loop unit 3 (for example, a 5GHz loop antenna) to suppress the half-wavelength resonance mode of the 5GHz loop antenna (close to the 2.4GHz operating frequency band) ), thereby greatly reducing the isolation between 2.4 and 5GHz antennas in the 2.4GHz frequency band.

Furthermore, according to different design requirements, the radiating units 2 and the loop units 3 have at least the following five different design aspects:

1. Please refer to Figure 1B. The first signal feed-in pin 21 of each radiating element 2 is adjacent to the second short-circuit pin 30 of one of the adjacent loop units 3, and each radiating element 2 The first short-circuit pin 20 is adjacent to the second signal feed-in pin 31 of another adjacent loop unit 3. In other words, from the perspective of one of the radiating elements 2, the first signal feeding pin 21 of the radiating element 2 is adjacent to the second short-circuit pin 30 of the loop unit 3 on the left, and the first short-circuit of the radiating element 2 The pin 20 is adjacent to the second signal feeding pin 31 of the loop unit 3 on the right. With the above-mentioned staggered design of the pins, the problem of mutual electromagnetic field interference between the first signal feed-in pin 21 and the second signal feed-in pin 31 is reduced. Therefore, the present invention can greatly reduce the mutual coupling between every two radiating elements 2 and loop elements 3 with different antenna operating frequencies, and achieve good antenna characteristics with isolation below -20dB.

2. As shown in the first C and the first D, the first short-circuit pin 20 and the first signal feed-in pin 21 of each radiating unit 2 are separated by a predetermined distance from each other, and each loop unit 3 The second short-circuit pin 30 and the second signal feed-in pin 31 are separated by a predetermined distance to achieve a good match. In addition, according to different design requirements, the designer can change the operating frequency of the antenna by adjusting the predetermined distance. In addition, "the predetermined distance between the aforementioned first short-circuit pin 20 and the first signal feed-in pin 21" and "the predetermined distance between the aforementioned second short-circuit pin 30 and the second signal-feed pin 31" are both It can be adjusted according to the required antenna performance. Furthermore, the height of each radiating unit 2 and each loop unit 3 relative to the ground unit 1 can also be adjusted according to the required antenna performance (such as antenna radiation pattern and antenna gain).

Therefore, by (1) controlling the distance between the first short-circuit pin 20 and the first signal feeding pin 21 of each radiating unit 2, and (2) control the second short-circuit pin 30 and the second short-circuit pin 30 of each loop unit 3 The spacing of the second signal feeding pins 31, and (3) control the height of each radiating unit 2 and each loop unit 3 relative to the ground unit 1, so that the composite multiple input multiple output antenna module of the present invention M achieves good impedance matching (defined by 2:1 VSWR or 10dB return loss) in the 2.4GHz and 5GHz wireless local area network frequency bands.

3. As shown in the first B to the first D, each first signal feed-in pin 21 has a first signal feed-in point 210 at the bottom, and each second signal feed-in pin 31 There is a second signal feeding point 310 at the bottom. In addition, the first signal feed points 210 and the second signal feed points 310 all face the geometric center of the ground unit 1 (the first signal feed points 210 and the second signal feed points 310 The distances relative to the geometric center of the ground unit 1 can be different, but the feed points of the radiating unit or loop unit of the same operating frequency band must have the same distance from the geometric center of the ground unit 1).

In addition, the signal transmission lines 5 are respectively directly and electrically connected to the first signal feeding points 210 of the first signal feeding pins 21 and indirectly electrically connected to the second signal feeding points through the filter units 4 The second signal feeding points 310 of the signal feeding pin 31 are inputted. Through the use of the signal transmission lines 5, the antenna signals received by the radiating units 2 and the loop units 3 can be transmitted to the circuit board in the wireless broadband router (router) or hub (not shown in the figure) Show).

4. As shown in Figures 1A and 1B, the first short-circuit pin 20 and the first signal feed-in pin 21 of each radiating element 2 are all located on the same plane, and the first short-circuit pin Both the 20 and the first signal feed-in pin 21 are approximately perpendicular to the first radiating body 22, and the second short-circuit pin 30, the second signal feed-in pin 31 and the second radiation of each loop unit 3 The bodies 32 are all located on the same plane or on the same curved surface.

5. The radiating units 2 have the same antenna operating frequency (for example, low frequency operating frequency), and the loop units 3 have the same antenna operating frequency (for example, high frequency operating frequency). For example, the antenna operating frequency of the radiation units 2 may be 2.4 GHz, and the antenna operating frequency of the loop units 3 may be 5 GHz.

Furthermore, according to the above five points, the radiating elements 2 and the looping elements 3 are defined. For example, three radiating elements 2 are shown in Figure A, and the uppermost one is defined as the first radiating element. Unit 2 (location code is S1), the lower left corner is the second radiator 2 (location code is S2), and the lower right corner is the third radiator 2 (location code is S3); the first A shows three loops Loop unit 3, define the upper right corner as the first loop unit 3 (location code is S4), the upper left corner is the second loop unit 3 (location code is S5), and the bottom is the third loop unit 3 ( The location code is S6).

Please perform the test according to the above-mentioned structure defined for the radiating units 2 and the loop units 3 in accordance with the first A and E diagrams, and the result shows that the first radiating unit 2 (as shown in the first The curve of an E figure represents the reflection coefficient (dB) obtained at different frequencies (Frequency) (MHz). According to the data of the three frequency points 1, 2, and 3 of the 2.4GHz band marked in the figure, it can be seen that the 2.4GHz operating band has a low reflection coefficient (below -10dB).

Please perform the test according to the above-mentioned structure defined for the radiation units 2 and the loop units 3 in accordance with the first A and the first F diagrams, and the result shows that one of the loop units 3 (such as the first The curve of a F graph represents the reflection coefficient (dB) obtained at different frequencies (Frequency) (MHz). It can be seen from the above figure that the reflection coefficient is low (below -7.3dB) in the 5GHz operating frequency band.

Please cooperate with the first A, and the first G to the first M to test according to the above-mentioned structure defined for the radiating units 2 and the loop units 3, and the result shows any radiation The isolation curve between the unit 2 and any loop unit 3 with each other. Among them, comparing the relative positional relationship between the three radiating units 2 and the three loop units 3 shown in the first A figure of this embodiment and the codes S1~S6 listed above, S21 in the first G figure represents The isolation curve between the second radiating unit 2 and the first radiating unit 2. S31 in the first H figure represents the isolation curve between the third radiating unit 2 and the first radiating unit 2 , S41 in the first I figure represents the isolation curve between the first loop unit 3 and the first radiating unit 2, and S51 in the first J figure represents the second loop unit The isolation curve between 3 and the first radiating unit 2, S61 in the first K figure represents the isolation curve between the third loop unit 3 and the first radiating unit 2, the first L S54 in the figure represents the isolation curve between the second loop unit 3 and the first loop unit 3, and S64 in the first M figure represents the third loop unit 3 and the first loop unit 3 A curve of isolation between loop units 3. It can be seen from the above figure that the isolation in the 2.4GHz and 5GHz bands can achieve good characteristics below -20dB. Especially from the first I to the first K, it can be seen that the isolation in the 2.4GHz frequency band is less than -45dB, mainly because the use of the filter unit 4 greatly suppresses the half-wavelength resonance mode of the loop unit 3 state.

In addition, please refer to the first N figure, the composite multiple input multiple output antenna module M of this creation can be installed in a wireless communication device casing C (for example: the wireless communication device casing of a wireless broadband router or the hub of a hub). The inside of the casing of the wireless communication device, for example, is installed inside the upper cover of the casing of the wireless communication device, wherein the ground unit 1, the radiation units 2, the loop units 3, and the filter units 4 are all covered in The inside of the casing C of the wireless communication device. Therefore, the composite MIMO antenna module M of this creation can be concealed in a wireless broadband router (router) or hub (hub), so the composite MIMO antenna module M of this creation does not need to be exposed outside The casing C of the wireless communication device is outside to maintain the integrity and aesthetics of the overall appearance of the product.

Furthermore, please refer to the second figure. The second embodiment of the present creation provides a composite multiple-input multiple-output antenna module M, which includes: a ground unit 1, multiple radiating units 2, multiple loop units 3 And multiple filtering units 4. It can be seen from the second figure that the biggest difference between the second embodiment and the first embodiment is that in the second embodiment, the second radiating body 32 of each loop unit 3 is connected to the second short-circuit pin 30 And the second signal is fed into the arc-shaped body between the pins 31. Of course, the second embodiment can still achieve the functions and effects that the composite multiple input multiple output antenna module M of the first embodiment can produce.

In addition, please refer to the third figure. The third embodiment of the present creation provides a composite multiple-input multiple-output antenna module M, which includes: a ground unit 1, multiple radiating units 2, multiple loop units 3, and Multiple filtering units 4. It can be seen from the third figure that the biggest difference between the third embodiment and the first embodiment is that in the third embodiment, the second radiating body 32 of each loop unit 3 has two symmetrical curved portions 320. By increasing the length of the radiating body, a longer resonance path can be provided, the antenna operating frequency can be reduced, and the antenna size can be reduced. Of course, the third embodiment can still achieve the functions and effects that the composite multiple input multiple output antenna module M of the first embodiment can produce.

Please refer to Fig. 4A and Fig. 4B. The fourth embodiment of the present creation provides a composite multiple-input multiple-output antenna module M, which includes: a ground unit 1, a plurality of radiating units 2, and a plurality of loops. Circle unit 3 and multiple filter units 4. It can be seen from the above figures that the biggest difference between the fourth embodiment and the first embodiment is: in the fourth embodiment, the second short-circuit pin 30, the second signal feed-in pin 31, and the second short-circuit pin 30 of each loop unit 3 The second radiating bodies 32 are all located on the same curved surface. In the fourth embodiment, the width of both sides of the second radiating body 32 can be increased to provide a longer resonance path, and this method will not increase the overall volume of the composite multiple-input multiple-output antenna module M . Of course, the fourth embodiment can still achieve the functions and effects that the composite multiple input multiple output antenna module M of the first embodiment can produce.

In summary, the composite MIMO antenna module of this creation has at least the following advantages:

1. In the example in this creation, the composite multiple-input multiple-output antenna module contains three independent radiating units (such as three monopole antennas) and three independent loop units (such as three loop antennas). ). Each radiating unit and each loop unit are respectively responsible for low-frequency 2.4GHz band operation and high-frequency 5GHz band operation to achieve the purpose of simultaneous dual-frequency operation. Therefore, this creation is different from the traditional dual-band antenna. The traditional dual-band antenna has only a single signal feed-in terminal, and an additional duplexer circuit is required for synchronous dual-band operation. This not only increases the cost, but also causes the overall system power loss.

2. In the example in this creation, each radiating unit can be a shorted monopole antenna, and each loop unit can be a loop antenna. This creation combines the above two different antenna types And antenna radiation field characteristics to form a composite multiple-input multiple-output antenna module.

3. In the example given in this creation, the overall height of the composite multiple-input multiple-output antenna module does not exceed 15mm to achieve the possibility of a built-in multiple bridge contact antenna. In other words, the composite MIMO antenna module of this invention can be built into a wireless broadband router or hub to maintain the integrity and aesthetics of the overall appearance of the product.

4. In the example given in this creation, by (1) controlling the distance between the first short-circuit pin and the first signal feeding pin of each radiating unit, (2) controlling the second of each loop unit The distance between the short-circuit pin and the second signal feed-in pin, and (3) control the height of each radiating unit and each loop unit relative to the ground unit, so that the composite multi-input multi-output antenna module of this creation Obtain good impedance matching (defined by 2:1 VSWR or 10dB return loss) in the 2.4GHz and 5GHz wireless local area network frequency bands.

5. In the example in this creation, because the first short-circuit pin of each radiating unit is adjacent to the second signal feed-in pin of the loop unit of different antenna operating frequencies (or the second short-circuit of each loop unit) The pin is adjacent to the first signal feeding pin of the radiating unit with different antenna operating frequencies), so this creation can greatly reduce the mutual coupling between every two radiating units with different antenna operating frequencies and the loop unit. In order to achieve the good characteristics of isolation (isolation) below -20dB.

6. In the example given in this creation, each radiating unit (such as a 2.4GHz monopole antenna) can provide a conical radiation field pattern, which is suitable for the design of ceiling bridge-point antennas. In addition, each loop unit is a full-wavelength loop antenna (one-wavelength loop), and is a balanced structure, which has the ability to greatly suppress the surface excitation current of the antenna ground plane (or system ground plane). Advantages, so the ground plane (the ground unit) can be regarded as a reflector here, so that the antenna radiation pattern of this creation has a higher directivity, so as to achieve a high-gain antenna design (which can compensate for the 5GHz operating frequency band) High path loss) and improve the communication coverage.

7. In the example given in this creation, each loop unit is placed vertically on the edge of the ground plane (that is, the outermost side of the ground unit), and the radiation field pattern of the antenna is affected by the two orthogonal directions of the ground plane ( orthogonal directions) (one direction is perpendicular to the ground plane (parallel to the antenna), the other direction is parallel to the ground plane) reflection, each loop unit in the 3dB half-power beam diameter of the plane perpendicular to the antenna can be The angles above at least one quadrant on the polar coordinate are covered, so each loop unit can generate a wide beam diameter and wide radiation field pattern.

8. In the example given in this creation, the grounding unit and the loop units are integrally made by stamping or cutting metal sheets, and can be formed by a single radiating metal sheet, so this creation can effectively save production costs and processing time.

9. In the example in this creation, each 2.4GHz printed microstrip band-stop filter is electrically connected to the second of each loop unit (for example, a 5GHz loop antenna). The signal feed point is used to suppress the half-wavelength resonance mode of the 5GHz loop antenna (close to the 2.4GHz operating band), thereby greatly reducing the isolation gain value between the 2.4 and 5GHz antennas in the 2.4GHz band.

The above descriptions are only the preferred and feasible embodiments of this creation, and do not limit the scope of the creation of this creation. Therefore, all equivalent technical changes made by using this creation specification and schematic content are included in the scope of this creation.

<p>C. . . Wireless communication device housing</p><p>M. . . Multiple input multiple output antenna module</p><p>1. . . Ground unit</p><p>10. . . perforation</p><p>100. . . Outer side</p><p>2. . . Radiating unit</p><p>A. . . Geometric centerline</p><p>20. . . The first short-circuit pin</p><p>twenty one. . . The first signal feed-in pin</p><p>210. . . The first signal feed-in point</p><p>twenty two. . . First radiation body</p><p>3. . . Loop unit</p><p>B. . . Geometric centerline</p><p>30. . . Second short-circuit pin</p><p>31. . . The second signal feed-in pin</p><p>310. . . Second signal feed-in point</p><p>32. . . Second radiation body</p><p>320. . . Bend</p><p>4. . . Filter unit</p><p>41. . . The first section of the transmission line</p><p>42. . . The second section of the transmission line</p><p>43. . . Microwave Printed Filter</p><p>5. . . Signal transmission line</p><p>θ, θ. . . Included angle</p>

Figure 1A is a schematic top view of the first embodiment of the composite multiple-input multiple-output antenna module created;

The first figure B is a three-dimensional schematic diagram of the first embodiment of the composite multiple-input multiple-output antenna module created;

The first C figure is a three-dimensional schematic diagram of one of the radiating units of the first embodiment of the creation;

The first D diagram is a schematic diagram of the front view of one of the loop units of the first embodiment of the creation;

The first figure E is a graph of the reflection coefficient obtained at different frequencies for the first radiating element of the creation of the first embodiment;

The first F figure is a graph of the reflection coefficient obtained at different frequencies for the third loop unit of the creation of the first embodiment;

The first G diagram is a graph of the isolation between the second radiating unit and the first radiating unit of the first embodiment of the creation;

The first H figure is a graph of the isolation between the third radiating unit and the first radiating unit in the creation of the first embodiment;

The first picture I is a graph of the isolation between the first loop unit and the first radiating unit of the first embodiment of the creation;

The first J is a graph of the isolation between the second loop unit and the first radiating unit of the first embodiment of the creation;

The first K figure is a graph of the isolation between the third loop unit and the first radiating unit of the first embodiment of the creation;

The first L figure is a graph of the isolation between the second loop unit and the first loop unit of the first embodiment of the creation;

The first M picture is a graph of the isolation between the third loop unit and the first loop unit of the first embodiment of the creation;

The first N figure is a three-dimensional schematic diagram of a wireless communication device housing in the first embodiment of the creation;

The second figure is a schematic front view of one of the loop units of the second embodiment of creation;

The third figure is a schematic front view of one of the loop units of the third embodiment of the creation;

Figure 4A is a schematic top view of the fourth embodiment of the composite multiple-input multiple-output antenna module created; and

The fourth figure B is a three-dimensional schematic diagram of the fourth embodiment of the composite multiple-input multiple-output antenna module created.