CN220492204U - Double-fed circularly polarized antenna - Google Patents
Double-fed circularly polarized antenna Download PDFInfo
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- CN220492204U CN220492204U CN202321954576.2U CN202321954576U CN220492204U CN 220492204 U CN220492204 U CN 220492204U CN 202321954576 U CN202321954576 U CN 202321954576U CN 220492204 U CN220492204 U CN 220492204U
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- 230000005855 radiation Effects 0.000 claims abstract description 21
- 239000002390 adhesive tape Substances 0.000 claims abstract 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 1
- 230000010287 polarization Effects 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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Abstract
The utility model discloses a double-fed circularly polarized antenna, which comprises a microstrip antenna body, a circuit board, a matching resistor and a connector, wherein the microstrip antenna body comprises a first feed needle, a second feed needle, a radiation layer, a dielectric layer and a grounding layer, the radiation layer is fixedly arranged at the top end of the dielectric layer, the grounding layer is fixedly arranged at the bottom end of the dielectric layer, and a needle cap of the first feed needle and a needle cap of the second feed needle are welded on the radiation layer; the circuit board is connected with one side, far away from the dielectric layer, of the grounding layer through double-sided adhesive tape, and comprises a first bonding pad, a second bonding pad and a coplanar waveguide wire. The double-fed circularly polarized antenna disclosed by the utility model has the advantages that a large device is not increased, the cost is not increased, and the occupied space on the PCB is smaller.
Description
Technical Field
The utility model belongs to the technical field of antennas, and particularly relates to a double-fed circularly polarized antenna.
Background
Compared with a single-feed circularly polarized antenna, the double-feed circularly polarized antenna has smaller axial ratio, wider axial ratio bandwidth and very wide application. Positioning navigation, satellite communications, wireless communications, radio frequency identification, etc. can be used. The double-fed circularly polarized antenna has two feed points with 90 degrees phase difference, and needs to be combined into one path in one mode. At present, the following modes are combined: 1. combining with a bridge with 90 degree phase difference; 2. combining by using a microstrip line Wilkinson power divider with a phase difference of 90 degrees; 3. and a T-shaped power divider with a phase difference of 90 degrees is used for combining. In the first mode, the bridge occupies a smaller space on the PCB, and other circuits can be arranged on the PCB, but a device is added, so that the cost of the whole product is increased. The second and third modes occupy too much space on the PCB, leaving too little space for other circuitry.
Accordingly, the above problems are further improved.
Disclosure of Invention
The main object of the present utility model is to provide a double-fed circularly polarized antenna which does not increase the number of large devices, does not increase the cost, and occupies a relatively small space on a PCB.
In order to achieve the above object, the present utility model provides a double-fed circularly polarized antenna, comprising a microstrip antenna body, a circuit board, a matching resistor and a connector, wherein:
the microstrip antenna body comprises a first feed needle, a second feed needle, a radiation layer, a dielectric layer and a grounding layer, wherein the radiation layer is fixedly arranged at the top end of the dielectric layer, the grounding layer is fixedly arranged at the bottom end of the dielectric layer, and a needle cap of the first feed needle and a needle cap of the second feed needle are welded on the radiation layer;
the circuit board is connected with one side of the grounding layer, which is far away from the dielectric layer, through double-sided tape, the circuit board comprises a first bonding pad, a second bonding pad and a coplanar waveguide wire, the first bonding pad, the second bonding pad and the coplanar waveguide wire are positioned on one side of the circuit board, which is far away from the grounding layer, one end (stitch) of the first feed needle, which is far away from the needle cap, sequentially penetrates through the radiation layer, the dielectric layer, the grounding layer, the double-sided tape and the circuit board and then is welded to the first bonding pad, and one end (stitch) of the second feed needle, which is far away from the needle cap, sequentially penetrates through the radiation layer, the dielectric layer, the grounding layer, the double-sided tape and the circuit board and then is welded to the second bonding pad, and the first bonding pad and the second bonding pad are respectively positioned at the first tail end and the second tail end of the coplanar waveguide wire;
the matching resistor is arranged on a third bonding pad and a fourth bonding pad of the circuit board, the phase difference between the first tail end and the second tail end and the matching resistor is 90 degrees, the joint between the third bonding pad and the fourth bonding pad and the coplanar waveguide wire is a first wire and a second wire respectively, and the joint between the coplanar waveguide wire and the connector is a second wire.
As a further preferable technical scheme of the technical scheme, extension blocks are arranged on the peripheral edges of the radiation layer.
As a further preferable technical scheme of the above technical scheme, a first grounding copper clad is arranged on one side of the circuit board close to the grounding layer, and a second grounding copper clad is arranged on one side of the circuit board far from the grounding layer.
As a further preferable technical solution of the above technical solution, the first conductive wire and the second conductive wire are symmetrically arranged, and the impedances of the first conductive wire and the second conductive wire are both 70.7 ohms, and the phases are both 90 degrees.
As a further preferable embodiment of the above technical solution, the impedance of the second wire is 50 ohms.
As a further preferable technical scheme of the technical scheme, the conductor of the coplanar waveguide line is isolated from the conductor by a grounding copper sheet.
Drawings
Fig. 1 is a schematic structural view (front surface) of a double-fed circularly polarized antenna according to the present utility model.
Fig. 2 is a schematic structural view (reverse side) of a double-fed circularly polarized antenna according to the present utility model.
The reference numerals include: 10. a microstrip antenna body; 11. a first feed pin; 12. a second feed pin; 13. a radiation layer; 14. a dielectric layer; 15. an extension block; 20. a circuit board; 21. coplanar waveguide lines; 22. a combining place; 23. the first grounding copper coating; 24. the second grounding copper coating; 25. a grounding copper sheet; 30. matching the resistor; 40. a connector.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
The utility model discloses a double-fed circularly polarized antenna, and the specific embodiment of the utility model is further described below with reference to the preferred embodiment.
In the embodiments of the present utility model, those skilled in the art note that the ground layer and the like to which the present utility model relates can be regarded as the prior art.
Preferred embodiments.
As shown in fig. 1-2, the utility model discloses a double-fed circularly polarized antenna, which comprises a microstrip antenna body 10, a circuit board 20, a matching resistor 30 and a connector 40, wherein:
the microstrip antenna body 10 comprises a first feed pin 11, a second feed pin 12, a radiation layer 13, a dielectric layer 14 and a ground layer (not shown), wherein the radiation layer 13 is fixedly arranged at the top end of the dielectric layer 14, the ground layer is fixedly arranged at the bottom end of the dielectric layer 14, and the pin caps of the first feed pin 11 and the second feed pin 12 are welded to the radiation layer 13;
the circuit board 20 is connected to a side of the ground layer, which is far away from the dielectric layer 14, through a double-sided tape (not shown), the circuit board 20 includes a first bonding pad, a second bonding pad and a coplanar waveguide wire 21, the first bonding pad, the second bonding pad and the coplanar waveguide wire 21 are located at a side of the circuit board 20, which is far away from the ground layer, one end (stitch) of the first feed pin 11, which is far away from the needle cap, sequentially penetrates through the radiation layer 13, the dielectric layer 14, the ground layer, the double-sided tape and the circuit board 20 and then is welded to the first bonding pad, and one end (stitch) of the second feed pin 12, which is far away from the needle cap, sequentially penetrates through the radiation layer 13, the dielectric layer 14, the ground layer, the double-sided tape and the circuit board 20 and then is welded to the second bonding pad, and the first bonding pad and the second bonding pad are respectively located at a first end and a second end of the coplanar waveguide wire 21;
the matching resistor 30 is mounted on a third pad and a fourth pad of the circuit board 20, the phase difference between the first end and the second end and the matching resistor 30 is 90 degrees, the joint 22 between the third pad and the fourth pad and the coplanar waveguide line 21 is a first wire and a second wire, and the joint 22 between the coplanar waveguide line 21 and the connector 40 is a second wire.
Specifically, the peripheral edges of the radiation layer 13 are provided with extension blocks 15.
More specifically, a first ground copper 23 is disposed on a side of the circuit board 20 adjacent to the ground layer and a second ground copper 24 is disposed on a side of the circuit board 20 away from the ground layer.
Further, the first wire and the second wire are symmetrically arranged, the impedance of the first wire and the impedance of the second wire are 70.7 ohms, and the phase positions of the first wire and the second wire are 90 degrees.
Further, the impedance of the second wire is 50 ohms.
Preferably, the conductor-to-conductor isolation 25 of the coplanar waveguide line 21 is achieved by a grounded copper sheet, and the microstrip antenna body is free of any metal isolation from line to line, so that the isolation of the coplanar waveguide line is higher than that of the microstrip line.
It should be noted that technical features such as a ground layer and the like related to the present application should be considered as the prior art, and specific structures, working principles, and control modes and spatial arrangement modes possibly related to the technical features should be selected conventionally in the art, and should not be considered as the utility model point of the present application, and the present application is not further specifically developed in detail.
Modifications of the embodiments described above, or equivalents of some of the features may be made by those skilled in the art, and any modifications, equivalents, improvements or etc. within the spirit and principles of the present utility model are intended to be included within the scope of the present utility model.
Claims (6)
1. The utility model provides a circular polarization antenna of doubly fed, its characterized in that includes microstrip antenna body, circuit board, matching resistance and connector, wherein:
the microstrip antenna body comprises a first feed needle, a second feed needle, a radiation layer, a dielectric layer and a grounding layer, wherein the radiation layer is fixedly arranged at the top end of the dielectric layer, the grounding layer is fixedly arranged at the bottom end of the dielectric layer, and a needle cap of the first feed needle and a needle cap of the second feed needle are welded on the radiation layer;
the circuit board is connected with one side, far away from the dielectric layer, of the grounding layer through double-sided adhesive tape, the circuit board comprises a first bonding pad, a second bonding pad and a coplanar waveguide wire, the first bonding pad, the second bonding pad and the coplanar waveguide wire are positioned on one side, far away from the grounding layer, of the circuit board, one end, far away from the needle cap, of the first feed needle sequentially penetrates through the radiation layer, the dielectric layer, the grounding layer, the double-sided adhesive tape and the circuit board and then is welded to the first bonding pad, one end, far away from the needle cap, of the second feed needle sequentially penetrates through the radiation layer, the dielectric layer, the grounding layer, the double-sided adhesive tape and the circuit board and then is welded to the second bonding pad, and the first bonding pad and the second bonding pad are respectively positioned at the first tail end and the second tail end of the coplanar waveguide wire;
the matching resistor is arranged on a third bonding pad and a fourth bonding pad of the circuit board, the phase difference between the first tail end and the second tail end and the matching resistor is 90 degrees, the joint between the third bonding pad and the fourth bonding pad and the coplanar waveguide wire is a first wire and a second wire respectively, and the joint between the coplanar waveguide wire and the connector is a second wire.
2. A doubly-fed circularly polarized antenna according to claim 1, wherein said radiating layer has extension blocks at its peripheral edges.
3. The dual feed circularly polarized antenna of claim 2, wherein a side of the circuit board adjacent to the ground layer is provided with a first ground copper and a side of the circuit board remote from the ground layer is provided with a second ground copper.
4. A doubly-fed circularly polarized antenna according to claim 3 wherein said first and second conductive lines are symmetrically disposed and wherein said first and second conductive lines each have an impedance of 70.7 ohms and a phase of 90 degrees.
5. A doubly-fed circularly polarized antenna according to claim 4 wherein said second wire has an impedance of 50 ohms.
6. A doubly fed circularly polarized antenna according to claim 5 wherein said coplanar waveguide wires are isolated from each other by a grounded copper sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321954576.2U CN220492204U (en) | 2023-07-24 | 2023-07-24 | Double-fed circularly polarized antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321954576.2U CN220492204U (en) | 2023-07-24 | 2023-07-24 | Double-fed circularly polarized antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220492204U true CN220492204U (en) | 2024-02-13 |
Family
ID=89842685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321954576.2U Active CN220492204U (en) | 2023-07-24 | 2023-07-24 | Double-fed circularly polarized antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220492204U (en) |
-
2023
- 2023-07-24 CN CN202321954576.2U patent/CN220492204U/en active Active
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