A combined antenna

Abstract

The utility model discloses a combined antenna, including substrate, circuit board, positioning antenna, series feed microstrip line and a plurality of communication antennas, the circuit board is fixedly installed through a plurality of mounting post the top surface of substrate, positioning antenna set up the top surface and the bottom surface of circuit board, the communication antenna is distributed the four peripheral edges of substrate and the projection direction does not coincide with positioning antenna, the radiation surface of communication antenna is located the top surface of substrate and the feed point and ground point of communication antenna are located the bottom surface of substrate, and the feed point is communicated with the radiation surface of top surface through copper via, and a plurality of communication antennas are connected through series feed microstrip line and can receive and send circular polarization wave signal. The utility model discloses a combined antenna has the advantages of light weight, low cost, simple structure and stable performance, and solves the contradiction problem of weakening communication function and increasing volume of the existing combined antenna.

Description

Technical Field

[0001] This utility model belongs to the field of antenna technology, specifically relating to a combined antenna. Background Technology

[0002] Currently, positioning and communication combined antenna technology has been widely applied in various communication fields. Communication antennas often employ multi-antenna structures, but combined antennas are limited by their own size, often restricting their design to edge areas or even obstructed areas, resulting in weakened communication functionality. Furthermore, using multiple antennas to address edge and obstruction issues leads to an increase in antenna ports, further increasing antenna size and making it difficult to meet the demands for lightweight and miniaturized applications. Utility Model Content

[0003] The main purpose of this invention is to provide a combined antenna that has the advantages of being lightweight, low-cost, simple in structure and stable in performance, and solves the contradiction between the weakening of communication function and the increase in size of existing combined antennas.

[0004] To achieve the above objectives, this utility model provides a combined antenna, comprising a substrate, a circuit board, a positioning antenna, a series-fed microstrip line, and multiple communication antennas, wherein: The circuit board is fixedly mounted on the top surface of the substrate by a number of mounting posts; the positioning antenna is disposed on the top and bottom surfaces of the circuit board; The communication antenna is distributed around the perimeter of the substrate and its projection direction does not coincide with the positioning antenna. The radiating surface of the communication antenna is located on the top surface of the substrate, and the feed point and ground point of the communication antenna are located on the bottom surface of the substrate. The feed point is connected to the radiating surface of the top surface through a copper via. The series-fed microstrip line is located on the bottom surface of the substrate and is connected to the feed points of multiple communication antennas.

[0005] As a further preferred embodiment of the above technical solution, the positioning antenna is provided with a first radiating ring, a second radiating ring and a plurality of choke-coupled arc-shaped microstrip lines located on the top surface of the circuit board, the second radiating ring surrounding the first radiating ring and the choke-coupled arc-shaped microstrip lines distributed around the second radiating ring; the positioning antenna is also provided with an annular feeding surface located on the bottom surface of the circuit board.

[0006] As a further preferred embodiment of the above technical solution, the annular feeding surface includes a first feeding point, a second feeding point, a first bridge, a second bridge, and a total bridge, wherein: The first power supply point is connected to the adjacent first bridge, and the first bridge is connected to the main bridge via left and right hand transmission lines; The second power supply point is connected to the adjacent second bridge, and the second bridge is connected to the total bridge via a phase-shifted microstrip line.

[0007] As a further preferred technical solution to the above technical solution, a positioning module is also included, wherein the main bridge is connected to the input and output terminals of the positioning module via a radio frequency circuit.

[0008] As a further preferred technical solution to the above technical solution, a communication module is also included, wherein the series-fed microstrip line is connected to the input and output terminals of the communication module.

[0009] The beneficial effects of this utility model are as follows: This invention uses two FR4 double-sided copper-clad PCBs as the substrates for the positioning antenna and communication antenna, respectively. The positioning antenna employs a multi-feed structure to ensure positioning accuracy and phase center stability, and uses a coplanar dual-frequency dual-loop structure to greatly reduce the antenna's volume. The communication antenna is located at the top edge of the overall substrate, and its projection direction does not coincide with the positioning antenna. The multi-antenna structure effectively increases the radiation efficiency in all directions. The series-feed structure microstrip lines are connected to each feed point of the communication antenna. Each microstrip line connecting to the multi-antenna feed points can use microstrip lines with different impedances and corresponding phase shift lengths, achieving phase shifting while connecting the antennas. Finally, they are uniformly connected to the input and output terminals of the communication module. Compared with conventional communication multi-antenna feed lines, this greatly reduces the number of input and output feed points, and the positioning antenna circuit is coplanar without affecting it, and the overall antenna volume is not increased. The test results show that, compared with conventional positioning and communication combination antennas, the communication antenna with this series-feed structure has a more comprehensive radiation direction, which greatly reduces the structural obstruction of the communication antenna radiation. The multiple antennas can simultaneously increase the gain significantly through the series-feed structure, and can transmit and receive left-hand or right-hand circularly polarized waves simply by changing the series-feed direction, which greatly increases the signal transmission and reception capability. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a top view of the present invention.

[0012] Figure 3 This is a bottom view of the wiring connection of this utility model.

[0013] Figure 4 This is the antenna standing wave diagram of this utility model.

[0014] Figure 5 This is the XZ radiation pattern of the antenna of this utility model.

[0015] Figure 6This is the YZ radiation pattern of the antenna of this utility model.

[0016] Figure 7 This is the XY radiation pattern of the antenna of this utility model.

[0017] The reference numerals in the attached figures include: 1-substrate; 2-circuit board; 3-positioning antenna; 311-first feed point; 312-second feed point; 32-left and right hand transmission lines; 33-phase-shifting microstrip line; 341-first bridge; 342-second bridge; 343-total bridge; 35-RF circuit; 36-positioning module; 4-communication antenna; 41-feed point; 42-ground point; 43-communication module; 5-series feed microstrip line; 6-choke coupled arc-shaped microstrip line. Detailed Implementation

[0018] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0019] This utility model discloses a combined antenna. The specific embodiments of the utility model are further described below with reference to preferred embodiments.

[0020] In the embodiments of this utility model, those skilled in the art will note that the FR4 copper plating and the like involved in this utility model can be considered as prior art.

[0021] Preferred embodiment.

[0022] like Figure 1-7 As shown, this utility model discloses a combined antenna, including a substrate 1, a circuit board 2, a positioning antenna 3, a series-fed microstrip line 5, and multiple communication antennas 4, wherein: The circuit board 2 is fixedly mounted on the top surface of the substrate 1 by a plurality of mounting posts, and the outer ring size of the substrate 1 is larger than the outer ring size of the circuit board 2; the positioning antenna 3 is disposed on the top and bottom surfaces of the circuit board 2; The communication antenna 4 is distributed around the perimeter of the substrate 1 and its projection direction does not coincide with the positioning antenna 3. The radiating surface of the communication antenna 4 is located on the top surface of the substrate 1, and the feed point 41 and ground point 42 of the communication antenna 4 are located on the bottom surface of the substrate 1. The feed point 41 is connected to the radiating surface of the top surface through a copper via. Multiple communication antennas are connected through a series-feed microstrip line 5 to transmit and receive circularly polarized wave signals. The series-feed microstrip line 5 is disposed on the bottom surface of the substrate 1 and is connected to the feed points 41 of the multiple communication antennas 4 respectively.

[0023] Specifically, the positioning antenna 3 is provided with a first radiating ring, a second radiating ring and a plurality of choke-coupled arc-shaped microstrip lines 6 on the top surface of the circuit board 2. The second radiating ring surrounds the first radiating ring and the choke-coupled arc-shaped microstrip lines 6 are distributed around the (outer) periphery of the second radiating ring (i.e., the edge of the circuit board). The positioning antenna 3 is also provided with an annular feeding surface on the bottom surface of the circuit board 2.

[0024] More specifically, the annular feeding surface includes two first feeding points 311, two second feeding points 312, a first bridge 341, a second bridge 342, and a total bridge 343, wherein: The first power supply point 311 is connected to the adjacent first bridge 341, and the first bridge 341 is connected to the main bridge 343 through the left and right hand transmission lines 32. The second power supply point 312 is connected to the adjacent second bridge 342, and the second bridge 342 is connected to the total bridge 343 via a phase-shifting microstrip line 33.

[0025] Furthermore, it also includes a positioning module 36, and the main bridge 343 is connected to the input and output terminals of the positioning module 36 via a radio frequency circuit 35.

[0026] Furthermore, it also includes a communication module 43, with the series-fed microstrip line 5 connected to the input and output terminals of the communication module 43.

[0027] It is worth mentioning that the FR4 copper-clad technology features involved in this utility model patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be conventionally selected in the field and should not be regarded as the inventive point of this utility model patent. This utility model patent will not elaborate further.

[0028] For those skilled in the art, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A combined antenna, characterized in that, Includes a substrate, circuit board, positioning antenna, series-fed microstrip line, and multiple communication antennas, among which: The circuit board is fixedly mounted on the top surface of the substrate by a number of mounting posts; the positioning antenna is disposed on the top and bottom surfaces of the circuit board; The communication antenna is distributed around the perimeter of the substrate and its projection direction does not coincide with the positioning antenna. The radiating surface of the communication antenna is located on the top surface of the substrate, and the feed point and ground point of the communication antenna are located on the bottom surface of the substrate. The feed point is connected to the radiating surface of the top surface through a copper via. The series-fed microstrip line is located on the bottom surface of the substrate and is connected to the feed points of multiple communication antennas.

2. The combined antenna according to claim 1, characterized in that, The positioning antenna has a first radiating ring, a second radiating ring, and a plurality of choke-coupled arc-shaped microstrip lines located on the top surface of the circuit board. The second radiating ring surrounds the first radiating ring, and the choke-coupled arc-shaped microstrip lines are distributed around the second radiating ring. The positioning antenna also has an annular feed surface located on the bottom surface of the circuit board.

3. A combined antenna according to claim 2, characterized in that, The annular feed surface includes a first feed point, a second feed point, a first bridge, a second bridge, and a total bridge, wherein: The first power supply point is connected to the adjacent first bridge, and the first bridge is connected to the main bridge via left and right hand transmission lines; The second power supply point is connected to the adjacent second bridge, and the second bridge is connected to the total bridge via a phase-shifted microstrip line.

4. A combined antenna according to claim 3, characterized in that, It also includes a positioning module, and the main bridge is connected to the input and output terminals of the positioning module via a radio frequency circuit.

5. A combined antenna according to claim 4, characterized in that, It also includes a communication module, and the series-fed microstrip line is connected to the input and output terminals of the communication module.

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