CN211929704U

CN211929704U - Miniaturized double-circular-polarization radiation unit

Info

Publication number: CN211929704U
Application number: CN202020603123.5U
Authority: CN
Inventors: 岳彩龙; 高永杰; 杨锦; 赵伟
Original assignee: Tongyu Communication Inc
Current assignee: Tongyu Communication Inc
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-11-13
Anticipated expiration: 2030-04-21

Abstract

A miniaturized dual-circular polarization radiating unit comprises a dual-linear polarization radiating unit and a PCB board with a Lange coupler and an impedance matching network, wherein the dual-linear polarization radiating unit is fixed on the PCB board, two polarization input ends of the dual-linear polarization radiating unit are connected with two polarization output ends of the impedance matching network, the two polarization input ends of the impedance matching network are respectively connected with a straight end and a coupling end of the Lange coupler, and the input end and an isolation end of the Lange coupler are used as two excitation ports of the dual-linear polarization radiating unit. A Lange coupler is adopted to replace a conventional 3dB electrical bridge and then is connected to a double-linear polarization broadband die-casting radiation unit, and left-hand and right-hand double circular polarizations are formed after two ports are respectively excited. The utility model discloses a two circular polarization radiating element, bandwidth width, loss are low, the size is little, the isolation is high, still has good radiation performance. By selecting the dual-linear polarization radiating unit with different frequency bands, circularly polarized waves with different frequency bands can be radiated.

Description

Miniaturized double-circular-polarization radiation unit

Technical Field

The utility model relates to an antenna technology field, what specifically say so is a miniaturized two circular polarization radiating element.

Background

The rapid development of wireless communication technology has put higher demands on the antenna in terms of broadband, low loss, miniaturization, radiation characteristics, and the like. Circularly polarized radiating elements are widely used in satellite-based space-conducting cables, and have attracted considerable attention for radiation characteristics and portability. At present, two technical approaches for realizing antenna circular polarization exist, one is single-point feed circular polarization with simple structure and low cost, and the axial ratio bandwidth is narrow, so the method is generally used for narrow-band antennas; and the second is double (multi) feed circular polarization, a wider bandwidth is easily realized by means of 3dB bridge feed, but the feed network also brings higher complexity to antenna design, and the feed network has large size and large network loss.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a miniaturized two circular polarization radiating element adopts the Lange coupler to replace conventional 3dB electric bridge, then connects on double-linear polarization broadband die-casting radiating element, and two ports form levogyration and two circular polarizations of dextrorotation after inciting respectively. The utility model discloses a two circular polarization radiating element, bandwidth width, loss are low, the size is little, the isolation is high, still has good radiation performance. By selecting the dual-linear polarization radiating unit with different frequency bands, circularly polarized waves with different frequency bands can be radiated.

In order to realize the technical purpose, the adopted technical scheme is as follows: a miniaturized dual-circular polarization radiating unit comprises a dual-linear polarization radiating unit and a PCB board with a Lange coupler and an impedance matching network, wherein the dual-linear polarization radiating unit is fixed on the PCB board, two polarization input ends of the dual-linear polarization radiating unit are connected with two polarization output ends of the impedance matching network, the two polarization input ends of the impedance matching network are respectively connected with a straight end and a coupling end of the Lange coupler, and the input end and an isolation end of the Lange coupler are used as two excitation ports of the dual-linear polarization radiating unit.

The dual-linear polarization radiating unit is a balanced balun feed structure and comprises a radiating body and a balun which are integrally arranged, and the radiating body is arranged above the balun.

The balun comprises two PCB feeding pieces for coupling feeding, and the input ends of the two PCB feeding pieces are two polarization input ends.

The utility model has the advantages that: according to the technical scheme, the Lange coupler is adopted to replace a conventional 3dB electrical bridge and then is connected to the dual-linear polarization radiating unit, the Lange coupler also has the characteristics of 3dB electrical bridge power equal division and 90-degree phase shift, and when two ports of the coupler are excited respectively, two orthogonal linear polarization components with equal amplitude and + 90-degree and-90-degree phase difference can be obtained, so that radiation of left-handed and right-handed dual-circular polarized waves is formed. The utility model discloses select the bandwidth can reach 50% broadband die-casting radiating element, combine high isolation and small-size Lange coupler, generate a neotype two circular polarized radiating element, make circular polarized antenna break away from traditional constraint, obtain better axial ratio and realize the miniaturization under sufficient bandwidth.

By selecting the dual-linear polarization radiating unit with different frequency bands, the circularly polarized waves with different frequency bands can be realized. Under the guidance of this patent, only slight changes to the radiating element or impedance matching network are needed to create more of the above dual circularly polarized radiating elements.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic diagram of the connection between the PCB feed strip and the Lange coupler in the dual-linear polarization radiating element of the present invention;

FIG. 3 is a diagram showing a comparison of the Lange coupler of the present invention with a first branch line and a second branch line;

fig. 4 is a standing-wave ratio diagram of the dual-linear polarization radiating unit of the present invention;

fig. 5 is an isolation diagram of the dual linearly polarized radiating element of the present invention;

fig. 6 is a normal axial ratio diagram of the dual linearly polarized radiating element of the present invention;

FIG. 7 is a simulated 3D diagram of the present invention;

in the figure: 1. a dual linearly polarized radiating element; 2. balun; 3. a PCB feed tab; 4. a Lange coupler; 5. an impedance matching network; 6. a PCB board; 4-1, a straight end; 4-2, a coupling end; 4-3, an isolation end; 4-4 and an input end.

Detailed Description

The utility model provides a miniaturized two circular polarization radiating element, including a dual linear polarization radiating element 1 and a PCB board 6 that has Lange coupler 4 and impedance matching network 5, dual linear polarization radiating element 1 can select the radiating element structure of different frequency channels as required for use, copper is covered on the PCB board 6 from top to bottom, below be ground, the higher authority is the microstrip line, dual linear polarization radiating element 1 is fixed on PCB board 6, both can dismantle fixed or welded fastening, PCB board 6 that has Lange coupler 4 places in the below, the size is littleer than other branch lines, carry out impedance matching to radiating element, realize good electrical property. Two polarization input ends of the dual-linear polarization radiating unit 1 are connected with two polarization output ends of the impedance matching network 5, the two polarization input ends of the impedance matching network 5 are respectively connected with a straight-through end 4-1 and a coupling end 4-2 of the Lange coupler 4, the input end 4-4 and the isolation end 4-3 of the Lange coupler 4 are used as two excitation ports of the dual-linear polarization radiating unit, and the dual-linear polarization radiating unit 1 can obtain two orthogonal linear polarization components with equal amplitude and phase difference of +90 degrees and-90 degrees through the isolation end 4-3 and the input end 4-4 of the excitation coupler, so that radiation of left-handed and right-handed dual-circular polarized waves is formed.

The dual-linear polarization radiating unit is a balanced balun feed structure and comprises a radiating body and a balun which are integrally arranged, and the radiating body which is used for supporting the antenna unit is arranged above the balun 2.

The balun is internally provided with two PCB feed sheets 3a and 3b which feed the balun in a coupling mode, and the input ends of the two PCB feed sheets are two polarization input ends. The lower part of the PCB feed plate is connected with a PCB with a Lange coupler, a microstrip line on the PCB feed plate 3 is connected with two polarization output ends of an impedance matching network, and two polarization input ends of the impedance matching network are connected with a through end 4-1 and a coupler 4-2 of the Lange coupler. Lange coupled lines have a higher isolation than other branch lines.

TABLE 1 comparison of bridge parameters for Lange couplers with primary and secondary branches

As can be seen from table 1, fig. 4, fig. 5, fig. 6, and fig. 7, when the first branch line and the second branch line are switched, the coupling line is used in cooperation with the dual-polarization radiating unit, which can realize miniaturization, reduce insertion loss, and realize circular polarization waves of different frequency bands.

A miniaturized double-circular polarized radiation unit adopts a Lange coupler to replace a conventional 3dB electric bridge to connect a double-linear polarized broadband die-casting radiation unit, and can form left-hand and right-hand double-circular polarized wave radiation with smaller size and higher isolation.

By selecting the dual-linear polarization radiating unit with different frequency bands, the circularly polarized waves with different frequency bands can be realized.

Under the guidance of this patent, the above-mentioned dual circularly polarized radiation units can be generated by only slightly changing the radiation unit or the impedance matching network, and therefore, the corresponding designs and products should be included in the scope of this patent.

Claims

1. A miniaturized dual circularly polarized radiation unit, characterized in that: the dual-linear polarization radiating unit is fixed on the PCB, two polarization input ends of the dual-linear polarization radiating unit are connected with two polarization output ends of the impedance matching network, the two polarization input ends of the impedance matching network are respectively connected with a straight end and a coupling end of the Lange coupler, and an input end and an isolation end of the Lange coupler are used as two excitation ports of the dual-linear polarization radiating unit.

2. A miniaturized dual circularly polarized radiating element according to claim 1, wherein: the dual-linear polarization radiating unit is a balanced balun feed structure and comprises a radiating body and a balun which are integrally arranged, and the radiating body is arranged above the balun.

3. A miniaturized dual circularly polarized radiating element according to claim 1, wherein: the balun comprises two PCB feeding pieces for coupling feeding, and the input ends of the two PCB feeding pieces are two polarization input ends.