Structure of dipole antenna

Dual polarized antenna structure

The present invention relates to a dual-polarized antenna structure, and more particularly to a dual-polarized antenna structure in the field of mobile wireless communications.

According to the dual-polarized antenna, it can be used in the field of mobile wireless communication (for example, CDMA, WCDMA, GSM), especially for wireless communication between the base station and one or more mobile subscriber units. The method further includes: an antenna device, configured to transmit an RF signal to the mobile subscriber unit, and configured to receive the RF signal sent by each mobile subscriber unit. Therefore, when the antenna device of the base station is a dual-polarized antenna, the antenna generates two Orthogonal polarization, especially using two linear polarizations oriented at +45 or -45 with respect to the vertical, is convenient.

According to a dual-polarized dipole antenna disclosed in US Pat. No. 6,819,300 B2, the single dipole 13 and its dipole half 13' (15, 15') are each independently arranged, so that a single dipole and The distance between the dipole halves and the height position is not easy to maintain, and the feeding mode of the dual-polarized dipole antenna is the feeding elbow 35 extending from the dipole and its dipole half. Electrically connected, the elbow 35 is not easy to electrically connect the feed line 27 and position the inner and outer conductors.

In addition, for a dual-polarized antenna for a base station, since each antenna device includes at least two radiating elements of a polarizing unit, the antenna should operate in two different frequency ranges (for example, CDMA 800 MHz band). And the GSM 900MHz band), when the radiators of the two polarization units transmit and receive RF signals of two frequency ranges at the same time, if the isolation of the operating frequency is not good, mutual interference will be caused to reduce the gain and efficiency of the antenna. In turn, the quality of the communication is affected. If the isolation and precision of the electronic components are added to increase the isolation of the two operating frequencies, the dual-polarized antenna of the base station is not easy to manufacture, assemble and costly.

In view of the problems caused by the prior art described above, the main purpose of the present invention is to provide a dual-polarized antenna structure that can improve the isolation of the operating frequency signal of the dual-polarized antenna to reduce interference and improve communication quality.

Another object of the present invention is to provide a dual-polarized antenna structure that can improve the stability of the positioning of the radiator and the ease of feeding.

According to the purpose of the present invention, a dual-polarized antenna structure is proposed. The antenna is as follows: the antenna comprises: at least four radiators and is fixed relative to the reflector by means of a balancing device and a base, wherein the radiator has Special feeding structure to improve the stability of the radiator positioning and the ease of feeding. The reflector is provided with a gap to improve the isolation of the working frequency signal of the dual-polarized antenna to reduce the interference and improve the quality of communication. .

In order to clarify the purpose, features and advantages of the present invention, a preferred embodiment will be described below in conjunction with the accompanying drawings.

Please refer to FIG. 1 and FIG. 2 for a schematic diagram of a dual-polarized antenna structure according to a preferred embodiment of the present invention. The antenna 1 comprises at least four radiators 10 and is fixed relative to the reflector 40 by means of a balancing device 20 and a base 30.

The four radiators 10 are arranged in an orthogonal symmetrical manner in a ±45° direction, and each of the radiators 10 includes: a balancing device 20, at least two radiation arms 11, 12, and a feeding structure 50, wherein the balancing device 20 It is composed of two spaced-apart support arms 21, 22, the bottom end of which is connected with the base 20, and the support arms 21, 22 extend obliquely from the bottom end to the top end and are respectively connected to the two radiating arms 11, 12 respectively. So that the two radiating arms 11, 12 each extend in the opposite direction by an appropriate length, and the radiating arms 11, 12 of the adjacent radiators 10 have appropriate gaps 13, and each of the two oppositely disposed radiators 10 constitutes the first A radiating element component of one or two polarization directions for transmitting and receiving RF signals of two frequency ranges.

The four radiators 10 together with the balancing device 20 can be fixed on the reflecting plate 40 by screws or welding with the base 30. The four radiators 10 can be integrally formed together with the balancing device 20 and the base 30.

Referring to FIG. 3, the feed structure 50 includes: a feed piece 51 disposed between each of the radiators 10 and 12, and a support arm 21 disposed in each of the balance devices 20. The top end of the perforation 52 and each of the radiators 10 are each configured with a feed line 60, wherein the feed line 60 can extend from the recess 211 formed by the support arm 21 to the top end perforation 52 so that the feed line 60 is outside the conductor 61 is electrically connected to the support arm 21, the inner conductor 62 of the feed line 60 is electrically connected to the end of the feed piece 51 through the through hole 52, and the other end of the feed piece 51 can be welded to the top end of the other support arm 22. For example, a protrusion 53 may be disposed between the top end of the other support arm 22 and the radiation arm 12, and may be inserted into the through hole 511 at the other end of the feeding piece 51 to be welded and positioned to each other. In addition, the two ends of the feeding piece 51 and the two radiations The top ends of the arms 11, 12 are each separated by a plastic washer 54.

Referring to FIG. 4, for each of the two oppositely disposed radiators 10, the feed structure 50 can be separated from the two feed lines 60 by a main feed line 70 through the divergent feed line 71 and the two oppositely disposed radiations. The device 10 is fed in a connection.

Referring to FIG. 1, the reflector 40 is disposed at the bottom of the antenna 1. The two sides of the reflector 40 form erected edges 41 and 42 so that the two flanges 41 and 42 are oppositely disposed, and the two sides are folded. 41, 42 are respectively provided with notches 411, 421 at positions corresponding to the gaps 13 of the radiating arms 11, 12 of the two adjacent radiators 10.

Efficacy description:

The fact that the efficiency of the creation is improved is as follows: the two radiating arms of each radiator of the present invention are connected by the two ends of the feeding piece of the feeding structure and the top end of the two radiating arms, so that the distance between the two radiating arms is different from each other. And the high and low positions are kept consistent by the feeding piece, and the feeding structure makes the inner and outer conductors of the feeding line easy to be divided and directly fed, so that the feeding connection of the creation is made simpler, and then the reflecting plate is used in two The flanges are respectively provided with gaps corresponding to the gap positions of the radiation arms of the two adjacent radiators, so that the radiation of the two polarization units can simultaneously transmit and receive the RF signals of the two frequency ranges, and the isolation of the working frequency can be When it reaches more than 35dB, it can improve the isolation of the operating frequency signal of the dual-polarized antenna to reduce the interference and improve the quality of communication.

The disclosures of the above embodiments are used to specifically explain the present creation, and although the descriptions are made through specific terms, the scope of patents of the novel creation cannot be limited thereby; those skilled in the art can understand the spirit of the creation. Changes and modifications are made to the equivalent purpose, and such changes and modifications are to be included in the scope defined by the scope of the patent application as described later.

<p>1. . . antenna</p><p>10. . . Radiator</p><p>11,12. . . Radiation arm</p><p>13. . . gap</p><p>20. . . Balance device</p><p>21, 22. . . Support arm</p><p>211. . . Groove</p><p>30. . . Base</p><p>40. . . Reflective plate</p><p>41, 42. . . Folding</p><p>411, 421. . . gap</p><p>50. . . Feed structure</p><p>51. . . Feeder</p><p>511. . . Through hole</p><p>52. . . perforation</p><p>53. . . Protrusion</p><p>54. . . Plastic washer</p><p>60. . . Feed line</p><p>61. . . Outer conductor</p><p>62. . . Inner conductor</p><p>70. . . Main feed line</p><p>71. . . Divergent feeder</p>

Figure 1 is a perspective view of a preferred embodiment of the present invention.

Figure 2 is a perspective view of an antenna of a preferred embodiment of the present invention.

Figure 3 is a cross-sectional view of a feed structure of a preferred embodiment of the present invention.

Figure 4 is a plan view of a preferred embodiment of the present invention.