CN117293534A - Coplanar waveguide feed antenna and end-fire antenna - Google Patents
Coplanar waveguide feed antenna and end-fire antenna Download PDFInfo
- Publication number
- CN117293534A CN117293534A CN202210691370.9A CN202210691370A CN117293534A CN 117293534 A CN117293534 A CN 117293534A CN 202210691370 A CN202210691370 A CN 202210691370A CN 117293534 A CN117293534 A CN 117293534A
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- antenna
- coplanar waveguide
- feed
- conductor strip
- substrate
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- 239000004020 conductor Substances 0.000 claims abstract description 32
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 238000001465 metallisation Methods 0.000 claims abstract description 23
- 239000002356 single layer Substances 0.000 claims description 4
- 230000005404 monopole Effects 0.000 abstract description 8
- 230000010363 phase shift Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- Waveguide Aerials (AREA)
Abstract
The invention provides a coplanar waveguide feed antenna and an end-fire antenna, and relates to the technical field of antennas. The antenna comprises: the coplanar waveguide comprises a first substrate and a central conductor strip arranged on the first substrate, wherein at least one feed metallization via hole is arranged on the central conductor strip; the first surface of the second substrate is provided with at least one patch antenna, and the patch antenna is connected with the central conductor strip through the feed metallization via hole; the center conductor strip is attached to a second surface of the second substrate, and the second surface is opposite to the first surface. The coplanar waveguide feed antenna provided by the invention feeds through the feed metallized via holes, and can realize 180-degree phase shift of current by adjusting the distance between patch antennas, thereby solving the problems of 180-degree phase difference feed of monopoles and multiple bending of slot lines because the antenna end-fire characteristics need to be kept on the same axis.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a coplanar waveguide feed antenna and an end-fire antenna.
Background
The end-fire antenna has the characteristics of high gain and low profile and is commonly used in aircraft, missiles and vehicle-mounted communication systems. The current end-fire antenna generally adopts a microstrip line to couple and feed to a slot line and a logarithmic period monopole antenna, the height of the logarithmic period monopole antenna needs to be reduced in a mode of loading a rectangular metal patch, and when the patch size is large, the antenna impedance is capacitive, so that the port impedance matching is not facilitated. The maximum radiation direction of the end-fire antenna needs to be kept the same as the geometric axis of the antenna structure, and in order to realize 180-degree phase difference feed of the monopole and the end-fire characteristic of the antenna, the antenna needs to be kept on the same axis, so that the slot line is bent for a plurality of times.
Disclosure of Invention
The invention aims to provide a coplanar waveguide feed antenna and an end-fire antenna, which are used for solving the problems that in the prior art, 180-degree phase difference feed of a monopole is realized, and the antenna end-fire characteristic needs to be kept on the same axis, so that a slot line is bent for many times.
To achieve the above object, an embodiment of the present invention provides a coplanar waveguide fed antenna, including:
the coplanar waveguide comprises a first substrate and a central conductor strip arranged on the first substrate, wherein at least one feed metallization via hole is arranged on the central conductor strip;
the first surface of the second substrate is provided with at least one patch antenna, and the patch antenna is connected with the central conductor strip through the feed metallization via hole;
the center conductor strip is attached to a second surface of the second substrate, and the second surface is opposite to the first surface.
Further, the coplanar waveguide further comprises a grounding conductor strip arranged on the first substrate, and a plurality of ground return metallized through holes are formed in the grounding conductor strip;
the patch antenna is connected with the ground return metallization via.
Further, the number of the patch antennas is the same as that of the feed metalized via holes and the ground return metalized via holes.
Further, each patch antenna is connected to the coplanar waveguide through one of the feed metallized via and one of the ground return metallized via.
Further, the coplanar waveguide is a single-layer coplanar waveguide without a ground.
Further, in the case that the feed metallization via is plural, the plurality of feed metallization vias are uniformly distributed on the center conductor strip.
Further, the patch antenna is a rectangular patch antenna etched on the first surface of the second substrate.
Further, in the case where there are a plurality of patch antennas, the patch antennas are different in size and sequentially increase or decrease along the center conductor strip.
Further, the section height of the coplanar waveguide feed antenna is less than one tenth of the low-frequency wavelength in the working frequency band.
To achieve the above object, an embodiment of the present invention provides an end-fire antenna, which is characterized by including the coplanar waveguide feed antenna as described above.
The technical scheme of the invention has the following beneficial effects:
the coplanar waveguide feed antenna is characterized in that a central conductor strip is arranged on a first substrate of a coplanar waveguide, and at least one feed metallization via hole is arranged on a thresh central conductor strip; at least one patch antenna is arranged on the first surface of the second substrate, and the patch antenna is connected with the central conductor strip through the feed metallization via hole; and the central conductor strip is attached to a second surface of the second substrate, and the second surface is opposite to the first surface. According to the scheme provided by the embodiment of the invention, the feeding is performed through the feeding metallized via holes, and the 180-degree phase shift of the current can be realized by adjusting the distance between the patch antennas, so that the problems that in the prior art, 180-degree phase difference feeding of monopoles is realized, and the antennas are required to be kept on the same axis due to the end-fire characteristics of the antennas are solved, and therefore, the slot line is bent for multiple times are solved.
Drawings
Fig. 1 is a schematic structural diagram of a coplanar waveguide feed antenna according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a coplanar waveguide fed antenna according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of return loss of a coplanar waveguide fed antenna in the frequency band of 1.43-2.7 GHz according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of in-band gain of a coplanar waveguide fed antenna according to an embodiment of the present invention;
FIG. 5 is a diagram of the electrical plane of a coplanar waveguide feed in accordance with an embodiment of the present invention;
fig. 6 is a magnetic plane pattern of a coplanar waveguide feed in accordance with an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
As shown in fig. 1 and 2, a coplanar waveguide fed antenna according to an embodiment of the present invention includes:
a coplanar waveguide 1, wherein the coplanar waveguide 1 comprises a first substrate 11 and a central conductor strip 12 arranged on the first substrate 11, and at least one feed metallization via 13 is arranged on the central conductor strip 12;
a second substrate 2, wherein at least one patch antenna 21 is arranged on the first surface of the second substrate 2, and the patch antenna 21 is connected with the central conductor strip 12 through the feed metallization 13 via hole;
the central conductor strip 12 is attached to a second surface of the second substrate 2, the second surface being opposite to the first surface.
According to the scheme provided by the embodiment of the invention, the feeding is performed through the feeding metallized via holes, and the 180-degree phase shift of the current can be realized by adjusting the distance between the patch antennas, so that the problems that in the prior art, 180-degree phase difference feeding of monopoles is realized, and the antennas are required to be kept on the same axis due to the end-fire characteristics of the antennas are solved, and therefore, the slot line is bent for multiple times are solved.
Optionally, the coplanar waveguide further includes a ground conductor strip 14 disposed on the first substrate 11, and a plurality of ground return metallized vias 15 are disposed on the ground conductor strip 14;
the patch antenna 21 is connected to the ground return metallization via 15.
The coplanar waveguide feed antenna provided by the embodiment of the invention feeds through the feed metallized via holes, and can realize 180-degree phase shift of current by adjusting the distance between patch antennas, thereby solving the problems that in the prior art, the antenna is required to be kept on the same axis due to the end-fire characteristic of the antenna in order to realize 180-degree phase difference feed of a monopole, and the slot line is bent for multiple times.
Optionally, the number of patch antennas 21 is the same as the number of feed metallized vias 13 and the number of return metallized vias 15.
In the coplanar waveguide feed antenna provided by the embodiment of the invention, the coplanar waveguide is fed through the feed metallization via hole, and the coplanar waveguide is grounded through the ground return metallization via hole. Meanwhile, the resonant frequency of the surface waveguide feed antenna and the surface radiation current direction of the patch antenna can be adjusted by adjusting the relative positions, such as the distance and the direction, of the feed metallized via hole and the return metallized via hole.
Optionally, each patch antenna 21 is connected to the coplanar waveguide 1 through one of the feed metallized vias 13 and one of the ground return metallized vias 15.
In an embodiment of the present invention, the patch antenna feeds the coplanar waveguide through the feed metallization via; and returning to ground through the return-to-ground metallization via.
Optionally, the coplanar waveguide is a single-layer coplanar waveguide without a ground.
Compared with the microstrip line coupling slot line feeding structure, the coplanar waveguide feeding antenna provided by the embodiment of the invention has fewer lamination layers, is simple to process, reduces the section height and has a simple feeding mode by adopting a mode of single-layer coplanar waveguide feeding without a ground.
Alternatively, in the case that the feed metallization vias 13 are plural, the plurality of feed metallization vias 13 are uniformly distributed on the center conductor strip 12.
Alternatively, the patch antenna 21 is a rectangular patch antenna etched on the first surface of the second substrate.
Optionally, in the case of a plurality of patch antennas, the patch antennas are different in size and sequentially increase or decrease along the central conductor strip.
According to the coplanar waveguide feed antenna provided by the embodiment of the invention, the 180-degree phase shift of current can be realized by adjusting the size of the patch antenna and the distances among a plurality of patch antennas.
Optionally, the section height of the coplanar waveguide fed antenna is less than one tenth of the low frequency wavelength in the operating band.
In an embodiment of the present invention, a section height of the coplanar waveguide fed antenna may be 0.038 times of a low-frequency wavelength in an operating band.
As shown in FIG. 3, the return loss of the coplanar waveguide feed antenna in the embodiment of the invention in the frequency band of 1.43-2.7 GHz is less than-10 dB, and the impedance bandwidth is 63.4%.
As shown in fig. 4, the coplanar waveguide feed antenna of the embodiment of the present invention has an in-band gain of 3.4 to 5.4dBi.
The normalized electric surface (E surface) direction diagram of the coplanar waveguide feed antenna in the embodiment of the invention at 1.4GHz, 2.1GHz and 2.7GHz is shown in figure 5, and the magnetic surface (H surface) direction diagram is shown in figure 6.
An embodiment of the invention provides an end-fire antenna characterized by comprising an antenna of coplanar waveguide feed as described above.
The exemplary embodiments described above are described with reference to the drawings, many different forms and embodiments are possible without departing from the spirit and teachings of the present invention, and therefore, the present invention should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will convey the scope of the invention to those skilled in the art. In the drawings, the size of the elements and relative sizes may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Unless otherwise indicated, a range of values includes the upper and lower limits of the range and any subranges therebetween.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (10)
1. An antenna for coplanar waveguide feed, comprising:
the coplanar waveguide comprises a first substrate and a central conductor strip arranged on the first substrate, wherein at least one feed metallization via hole is arranged on the central conductor strip;
the first surface of the second substrate is provided with at least one patch antenna, and the patch antenna is connected with the central conductor strip through the feed metallization via hole;
the center conductor strip is attached to a second surface of the second substrate, and the second surface is opposite to the first surface.
2. The coplanar waveguide fed antenna as defined by claim 1 wherein the coplanar waveguide further comprises a ground conductor strip disposed on the first substrate, the ground conductor strip having a plurality of ground return metallized vias disposed thereon;
the patch antenna is connected with the ground return metallization via.
3. The coplanar waveguide fed antenna as set forth in claim 2 wherein the patch antenna is the same number as the feed metallized vias and the ground return metallized vias.
4. The coplanar waveguide fed antenna as set forth in claim 2 wherein each of the patch antennas is connected to the coplanar waveguide by one of the feed metallized vias and one ground return metallized via.
5. The coplanar waveguide fed antenna as defined by claim 1 wherein the coplanar waveguide is a single layer coplanar waveguide without ground.
6. The coplanar waveguide fed antenna as set forth in claim 1 wherein, in the case of a plurality of said feed-metallization vias, a plurality of said feed-metallization vias are uniformly distributed over said center conductor strip.
7. The coplanar waveguide fed antenna as set forth in claim 1 wherein, if there are a plurality of patch antennas, the patch antennas are rectangular patch antennas etched on the first surface of the second substrate.
8. The coplanar waveguide fed antenna as set forth in claim 1 wherein a plurality of the patch antennas are different in size and sequentially increase or decrease along the central conductor strip.
9. The coplanar waveguide fed antenna as defined by claim 1 wherein the coplanar waveguide fed antenna has a profile height less than one tenth of a low frequency wavelength within an operating band.
10. An end-fire antenna comprising a coplanar waveguide feed antenna as set forth in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210691370.9A CN117293534A (en) | 2022-06-17 | 2022-06-17 | Coplanar waveguide feed antenna and end-fire antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210691370.9A CN117293534A (en) | 2022-06-17 | 2022-06-17 | Coplanar waveguide feed antenna and end-fire antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117293534A true CN117293534A (en) | 2023-12-26 |
Family
ID=89252326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210691370.9A Pending CN117293534A (en) | 2022-06-17 | 2022-06-17 | Coplanar waveguide feed antenna and end-fire antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117293534A (en) |
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2022
- 2022-06-17 CN CN202210691370.9A patent/CN117293534A/en active Pending
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