Wireless communication device

Wireless communication device

Wireless Communication Device

This creation refers to a wireless communication device, especially a kind of radio frequency signal feeding end is arranged adjacent to the metal frame and two grounding ends are arranged on two different sides of the feeding end, and can be compatible with the wireless communication of the product organization Device.

Antennas are used to transmit or receive radio waves to transmit or exchange radio signals. Generally, electronic products with wireless communication functions, such as notebook computers, personal digital assistants, etc., usually access the wireless network through a built-in antenna. With the evolution of wireless communication technology, the operating frequencies of different wireless communication systems may be different. Therefore, an ideal antenna should be able to cover the frequency bands required by different wireless communication networks with a single antenna.

Nowadays, most portable wireless communication devices take into account the beauty and durability, and often use metal shells or frames. Therefore, when the antenna is integrated into the portable wireless communication device, it is often affected by the metal shell or frame. Encountered the problem of antenna gain reduction or instability. Under this circumstance, in addition to facing the challenges of broadband requirements, antenna designers still need to consider the integration with the metal frame.

Therefore, how to combine the antenna with the metal frame environment to design a broadband antenna with broadband characteristics while meeting the space constraints of wireless communication devices has become one of the goals of the industry.

Therefore, the main purpose of this creation is to provide a feed-in device for RF signals. Two grounding terminals are arranged adjacent to the metal frame and on two different sides of the feeding end, which can be compatible with the wireless communication device of the product mechanism.

This creation discloses a wireless communication device, which includes a metal frame; a mechanism component arranged in an area surrounded by the metal frame, wherein a ground portion is formed on the mechanism component to provide grounding; and at least one antenna is provided In the area surrounded by the metal frame, each of the at least one antenna includes a radiator; a feeding end is electrically connected to the radiator and is arranged adjacent to the metal frame for feeding A radio frequency signal; a first grounding terminal arranged on a first side of the feeding terminal for electrically connecting the metal frame and the grounding portion of the mechanical component; and a second grounding terminal arranged on the feeding terminal A second side of the end is used to electrically connect the metal frame and the grounding portion of the mechanical component; wherein the metal frame, the mechanical component, and a closed area surrounded by the first and second grounding terminals form a first A slot.

<p>1, 2, 3, 5, 6Wireless communication device</p><p>10, 20, 30, 50, 60, 62, 64Slot</p><p>ANT1~ANT6antenna</p><p>FRMMetal frame</p><p>F1Inlet</p><p>R1Radiator</p><p>G11, G12, G51, G52, G53Ground terminal</p><p>G61, G62, G63, G64Ground terminal</p><p>G21, G22connection point</p><p>MCH1, MCH2, MCH6Mechanical parts</p><p>L10, L20, L30, L50, L60, L62, L64Length</p><p>13Coaxial cable</p><p>14Inner core wire</p><p>15Outer Woven Mesh</p>

Figure 1 is a schematic diagram of a wireless communication device according to the first embodiment of the creation.

Figure 2 is a schematic diagram of a wireless communication device according to the second embodiment of the creation.

Figure 3 is a schematic diagram of a wireless communication device according to the third embodiment of the creation.

Figure 4 is a schematic diagram of the voltage standing wave ratio of the antennas of the first to third embodiments.

Figure 5 is a schematic diagram of a wireless communication device according to the fourth embodiment of the creation.

Figure 6 is a schematic diagram of a wireless communication device of the fifth embodiment of the creation.

Please refer to Figure 1, which is a schematic diagram of a wireless communication device 1 according to the first embodiment of the creation. For ease of description, the wireless communication device 1 is a handheld mobile device, but it is not limited to this. The wireless communication device 1 may also be a tablet computer, a notebook computer, a personal digital assistant or any electronic device with wireless communication function. The wireless communication device 1 includes a metal frame FRM, a machine The component MCH1, an antenna ANT1 and a housing (not shown in Figure 1).

Structurally, the metal frame FRM constitutes a part of the housing, and surrounds the wireless communication device 1 without any gap or integrally formed. The mechanism component MCH1 is arranged in the area surrounded by the metal frame FRM, wherein a grounding portion is formed on the mechanism component MCH1 to provide grounding. The mechanical component MCH1 can be a metal back cover to form a part of the casing; or, the mechanical component MCH1 can also be a main board, which is arranged inside the casing. The antenna ANT1 is also arranged in the area surrounded by the metal frame FRM to send and receive wireless signals to realize wireless communication.

The antenna ANT1 includes a radiator R1, a feeding terminal F1, ground terminals G11 and G12, and a coaxial cable 13. The feeding terminal F1 is electrically connected to the radiator R1 for feeding a radio frequency signal, and the feeding terminal F1 is arranged adjacent to the metal frame FRM. The coaxial cable 13 includes an inner core wire 14 and an outer braided mesh 15. The inner core wire 14 can be electrically connected to the feeding terminal F1 by welding, so as to transmit the radio frequency signal to a radio frequency signal processor of the wireless communication device 1 (not shown in FIG. 1). The outer woven mesh 15 can be electrically connected to the metal frame FRM through welding, and then electrically connected to the grounding part through the metal frame FRM. The ground terminal G11 is arranged on one side of the feeding terminal F1 to electrically connect the metal frame FRM and the ground part of the mechanical component MCH1; and the ground terminal G12 is arranged on the other side of the feeding terminal F1 to electrically connect the metal frame Grounding part of FRM and mechanical parts MCH1. In other words, the ground terminals G11 and G12 are respectively arranged on two different sides of the feeding terminal F1. The enclosed area surrounded by the metal frame FRM, the mechanical component MCH1 and the grounding terminals G11 and G12 forms a slot 10. The grounding terminals G11 and G12 are separated by a length of L10 along the metal frame FRM, which is roughly between a quarter wavelength to a half wavelength of the lowest operating frequency of the RF signal to excite the resonance corresponding to the RF signal Modal.

In operation, when the wireless communication device 1 transmits and receives wireless signals, the radio frequency signal is fed to the feeding terminal F1, and the antenna ANT1 radiates the radio frequency signal directly into the air through the radiator R1. At the same time, Since the slot 10 constitutes a closed resonant cavity, a coupling resonance effect can be generated between the radiator R1 and the slot 10 to couple the radio frequency signal into the air. In this way, the antenna ANT1 can simultaneously use direct radiation and coupled resonant radiation to radiate radio frequency signals into the air for wireless communication.

Under the above structure, due to the coupling resonance effect between the radiator R1 and the slot 10, the RF current of the RF signal is distributed on the radiator R1 and the periphery of the closed slot 10 at the same time. In addition, the RF signal is formed by the metal frame FRM. The feed-in and feed-in point F1 are provided with ground terminals G11 and G12 on two different sides, so that most of the return current (or mirror current) of the RF signal can be guided to flow to the metal frame FRM, and then through the ground terminals G11, G12 returns to the ground to block the return current of the RF signal to the metal frame FRM outside the periphery of the slot 10.

In other words, a part of the metal frame FRM can be regarded as the radiator of the antenna ANT1 (that is, the part around the slot 10) to radiate the radio frequency signal into the air through the coupled resonance radiation. In addition, the RF signal is fed by the metal frame FRM and the grounding terminals G11 and G12 are arranged on the different sides of the feeding point F1 to block the return current of the RF signal from passing to the metal frame FRM outside the periphery of the slot 10. Therefore, It can reduce the influence of the human body on the wireless communication device 1 in the hand-held state, so that the antenna characteristics are not greatly affected, so as to maintain good antenna characteristics (assuming the user holds the metal frame FRM outside the periphery of the slot 10).

It is worth noting that because this creation uses a part of the metal frame FRM as the radiator of the antenna ANT1, this creation can make full use of the mechanical components of the wireless communication device 1, so that the metal frame FRM not only has functions such as beauty and durability, but also It can also be used to resonate wireless signals, so that the antenna ANT1 can be cleverly integrated into the appearance of the wireless communication device and conform to the product structure.

In short, this creation uses the metal frame FRM, the mechanical part MCH1 and the enclosed area surrounded by the ground terminals G11 and G12 to form the slot 10, so that the radiator R1 and the slot 10 are formed Coupling resonance effect to couple the radio frequency signal into the air. At the same time, in this creation, the radio frequency signal is fed by the metal frame FRM and ground terminals G11 and G12 are arranged on the two different sides of the feeding point F1. This structure can reduce the influence of the human body on the wireless communication device 1 in the hand-held state. Maintain good antenna characteristics. Under the above structure, this creation can make full use of the mechanical components of the wireless communication device, so that the metal frame not only has the functions of beauty and durability, but also can be used to resonate the wireless signal, so as to integrate the antenna into the appearance of the wireless communication device. Meet the product organization.

It should be noted that all wireless communication devices conforming to the above-mentioned architecture belong to the scope of this creation, and are not limited to this embodiment. For example, the manner of feeding the radio frequency signal is not limited. For example, the coaxial cable 13 can be replaced with a pair of pogo pins for electrically connecting to the feeding terminal F1 and the metal frame FRM, respectively. In addition, the closed slot surrounded by the metal frame FRM, the mechanical component MCH1, and the ground terminals G11, G12 can have any shape and size, and there is no limit to the way to adjust the shape of the slot. For example, the designer can adjust the shape and size of the slot 10 by adjusting the positions where the ground terminals G11 and G12 are electrically connected to the metal frame FRM, and then adjust the operating frequency of the antenna ANT1 to meet application requirements. Alternatively, the designer can also change the size of the mechanism component to be adjacent to the metal frame FRM, so that the mechanism component is directly electrically connected to the metal frame FRM.

Specifically, please refer to Figure 2, which is a schematic diagram of a wireless communication device 2 of the second embodiment of the creation. The difference between the wireless communication devices 1 and 2 is that the mechanical component MCH1 of the wireless communication device 1 is indirectly electrically connected to the metal frame FRM through the ground terminals G11 and G12, while the mechanical component MCH2 of the wireless communication device 2 is adjacent to the metal frame FRM, so that The mechanical component MCH2 is directly and electrically connected to the metal frame FRM. Under this structure, the mechanical part MCH2 is a metal back cover, and the enclosed area surrounded by the mechanical part MCH2 and the metal frame FRM forms a slot 20, and has a length L20 (that is, the connecting points G21, G22 along the metal frame FRM) The length of the radio frequency signal is approximately between a quarter wavelength to a half wavelength of the lowest operating frequency of the radio frequency signal to excite the resonance mode used to resonate the radio frequency signal.

It is worth noting that, based on appearance considerations, peripheral devices such as input/output ports, speakers or microphones of some wireless communication devices are designed on the metal frame FRM, so openings of different sizes and shapes must be formed in the metal frame FRM. Accordingly, this creation can also use the opening design of the metal frame FRM of the wireless communication device to match the antenna structure, so as to integrate the antenna into the wireless communication device ingeniously.

Specifically, please refer to Figure 3, which is a schematic diagram of a wireless communication device 3 according to the third embodiment of the creation. The difference between the wireless communication devices 2 and 3 is that a closed slot 30 is formed in the metal frame FRM of the wireless communication device 3 adjacent to the antenna to excite a resonance mode to increase the bandwidth of the antenna. The slot 30 has a length L30, which is approximately a length of one wavelength of the resonance mode.

Please refer to Figure 4, which shows a schematic diagram of the voltage standing wave ratio (VSWR) of the antenna under different slot structure designs of the wireless communication devices 1, 2, and 3. The voltage standing wave ratios of the antennas of the wireless communication devices 1, 2, and 3 are represented by solid lines, dashed lines, and dotted lines, respectively. As shown in Figure 4, when the shape and position of the radiator R1 and the feeding end F1 are fixed, the operating frequency of the antenna ANT1 can be adjusted by changing the sizes of the slots 10 and 20; and a slot is formed in the metal frame FRM 30 can excite another resonance mode to increase the operating frequency band and bandwidth of the antenna.

Furthermore, the wireless communication device can be equipped with multiple antennas at the same time to support antenna diversity technology, multi-input multi-output (MIMO) technology, or wireless communication of two or more different communication technologies system. Please refer to Figure 5, which is a schematic diagram of a wireless communication device 5 according to the fourth embodiment of the creation. The difference between the wireless communication devices 1 and 5 is that the wireless communication device 5 further includes antennas ANT2 and ANT3 to support wireless communication systems with two or more different communication technologies, such as the third-generation mobile communication technology, long term evolution (Long term evolution) communication technology and WiFi wireless technology.

The antennas ANT1, ANT2, and ANT3 have similar structures, including corresponding radiators, feed-in terminals, and ground terminals G11, G12, G51, G52, and G53, respectively. The ground terminals G51 and 52 of the antenna ANT2 are arranged on two different sides of the feeding terminal, and are used to electrically connect the metal frame FRM and the ground part of the mechanical component MCH1. A slot 50 is formed in the enclosed area surrounded by the metal frame FRM, the mechanical component MCH1 and the grounding terminals G51 and G52. The grounding terminals G51 and G52 are separated by a length of L50 along the metal frame FRM, which is roughly between a quarter wavelength to a half wavelength of the lowest operating frequency of the RF signal to excite the resonance mode of the RF signal . Preferably, the antennas ANT1 and 2 are larger in size, so they can be applied to wireless communication technologies with lower operating frequencies, such as third-generation mobile communication technologies or long-term evolution communication technologies.

Similarly, the ground terminals G51 and G53 of the antenna ANT3 are arranged on two different sides of the feeding terminal to electrically connect the metal frame FRM and the ground part of the mechanical component MCH1. A slot 52 is formed in the enclosed area surrounded by the metal frame FRM, the mechanical component MCH1 and the ground terminals G51 and G53. The grounding terminals G51 and G53 are separated by a length L52 along the metal frame FRM, which is roughly between a quarter wavelength to a half wavelength of the lowest operating frequency of the RF signal to excite the resonance mode of the RF signal . Preferably, since the size of the antenna ANT3 is smaller than that of the antennas ANT1 and ANT2, it can be applied to a wireless communication technology with a higher operating frequency, such as WiFi wireless technology.

It is worth noting that in the fourth embodiment, the antennas ANT2 and ANT3 can share the same ground terminal G51, as long as the ground terminals G51, G52, and G53 are provided on the two different sides of the feed terminal to form closed slots 50, 52 is fine. In addition, the radiation systems of the antennas ANT1 and ANT2 are completely arranged in the area surrounded by the slots 10 and 50, and the radiator of the part of the antenna ANT3 is not arranged in the slot 52.

In addition, the relative position between multiple antennas is unlimited, and the designer can adjust the position of the antennas according to the situation. Specifically, please refer to FIG. 6, which is a schematic diagram of a wireless communication device 6 of the fifth embodiment of the creation. The difference between the wireless communication devices 5 and 6 is that the antennas ANT1, ANT2 and ANT3 of the wireless communication device 5 are respectively arranged on one of the four sides surrounded by the metal frame, while the antennas ANT4, ANT5 and ANT6 of the wireless communication device 6 are arranged on the metal frame. The surrounding four sides are on the same side, and are arranged adjacent to each other.

In the antenna ANT4, a slot 60 is formed in the enclosed area surrounded by the metal frame FRM, the mechanical component MCH6, and the ground terminals G61 and G62. The grounding terminals G61 and G62 are separated by a length of L60 along the metal frame FRM, which is roughly between a quarter wavelength to a half wavelength of the lowest operating frequency of the RF signal to excite the resonance mode of the RF signal .

In the antenna ANT5, a slot 62 is formed in the enclosed area surrounded by the metal frame FRM, the mechanical component MCH6, and the ground terminals G62 and G63. The grounding terminals G62 and G63 are separated by a length of L62 along the metal frame FRM, which is roughly between one-quarter wavelength and one-half wavelength of the lowest operating frequency of the RF signal to excite the resonance mode of the RF signal .

In the antenna ANT6, a slot 64 is formed in the enclosed area surrounded by the metal frame FRM, the mechanical component MCH6, and the ground terminals G63 and G64. The grounding terminals G63 and G64 are separated by a length L64 along the metal frame FRM, which is roughly between one-quarter wavelength and one-half wavelength of the lowest operating frequency of the RF signal to excite the resonance mode of the RF signal .

In the fifth embodiment, the antennas ANT4 and ANT5 can share the same ground terminal G62, and the antennas ANT5 and ANT6 can share the same ground terminal G63. Taking the antenna ANT5 as an example, the antenna ANT5 is provided with two different sides of the feeding terminal. Grounding terminals G62 and G63 to form a closed slot 62.

In the first to fifth embodiments, the type of antenna is not limited, it can be a monopole antenna, a T-shaped monopole antenna, a dipole antenna, a planar inverted F antenna, a loop antenna, a slot antenna or For a coupled antenna, the designer can select one or more of the above-mentioned antenna types according to actual needs. For example, the antennas ANT1 and ANT4 are T-shaped monopole antennas with a ground branch, the antennas ANT2 and ANT3 are T-shaped monopole antennas, the antenna ANT5 is a monopole antenna, and the antenna ANT6 is a planar inverted F antenna.

To sum up, in this creation, the radio frequency signal is fed in from the metal frame and two ground terminals are arranged on the two different sides of the feeding point. This structure can reduce the influence of the human body on the wireless communication device in the hand-held state to maintain Good antenna characteristics. At the same time, in this creation, the radio frequency signal is fed in from the metal frame and grounding terminals are arranged on the different sides of the feeding point. This structure can reduce the influence of the human body on the wireless communication device in the hand-held state, so as to maintain good antenna characteristics. Under the above structure, this creation can make full use of the mechanical components of the wireless communication device, so that the metal frame not only has the functions of beauty and durability, but also can be used to resonate the wireless signal, so as to cleverly integrate the antenna into the appearance of the wireless communication device. Meet the product organization.