CN210272668U - ISGW feed gap coupling super-surface circularly polarized antenna - Google Patents
ISGW feed gap coupling super-surface circularly polarized antenna Download PDFInfo
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- CN210272668U CN210272668U CN201920844966.1U CN201920844966U CN210272668U CN 210272668 U CN210272668 U CN 210272668U CN 201920844966 U CN201920844966 U CN 201920844966U CN 210272668 U CN210272668 U CN 210272668U
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Abstract
The utility model discloses a super surface circular polarized antenna of ISGW feed gap coupling adopts four layers of dielectric slabs to constitute. The upper surface of the first dielectric plate is provided with corner cutting patches which are periodically arranged to form a radiation structure; the upper surface of the second dielectric plate is provided with a first copper-clad layer, the lower surface of the second dielectric plate is printed with a microstrip feeder line to form a waveguide-like feed structure for transmitting energy, and the energy is coupled to the corner-cut patch through a rectangular slot etched on the first copper-clad layer; the third dielectric plate is a blank dielectric plate and is used for separating the second dielectric plate from the fourth dielectric plate; the upper surface of the fourth dielectric plate is printed with a circular patch, a metal through hole is punched on the circular patch, the lower surface of the fourth dielectric plate is a second copper clad layer, and a mushroom-shaped electromagnetic band gap structure is formed together, so that the shielding performance of the circuit is improved. The utility model discloses integrated substrate gap waveguide feed gap coupling super surface circular polarized antenna has low section, wide bandwidth, characteristics such as high-gain, workable, can be as 5G millimeter wave antenna.
Description
Technical Field
The utility model relates to a wireless communication millimeter wave antenna especially relates to a super surface circular polarized antenna of ISGW feed gap coupling.
Background
With the development of communication systems, the frequency requirements of people on devices in microwave and millimeter wave frequency bands are continuously improved, and when the traditional microstrip line structure is applied to higher frequency, larger loss and leakage can be generated.
Integrated substrate gap waveguides can better address the above issues. The structure is based on multilayer PCB technology, and the microstrip line is packaged in the electromagnetic band gap structure, so that the shielding property of the feed network is improved.
In recent years, the super-surface structure is used for antenna design, and can improve the performance of the antenna in various aspects, such as bandwidth expansion, gain increase, directional diagram improvement and the like, thereby having good application prospects.
The utility model discloses combine integrated substrate clearance waveguide and super surface structure for the first time, designed the super surface circular polarized antenna of ISGW feed gap coupling to integrated substrate clearance waveguide customer service tradition microstrip line structure is at the limitation of millimeter wave frequency channel, realizes good antenna performance with super surface structure.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: aiming at the existing problems, the ISGW feed gap coupling super-surface circularly polarized antenna is provided, the problems of narrow bandwidth, low gain, serious leakage and the like of the existing millimeter wave antenna are solved, and the antenna can be applied to a 5G millimeter wave frequency band.
The utility model adopts the technical scheme as follows:
an ISGW feed gap coupling super-surface circularly polarized antenna comprises an antenna radiation structure and an integrated substrate gap waveguide structure, wherein the antenna radiation structure and the integrated substrate gap waveguide structure are sequentially arranged and overlapped from top to bottom by adopting a PCB technology; the integrated substrate gap waveguide structure comprises an electromagnetic band gap structure and a waveguide-like feed structure used for transmitting energy to the antenna radiation structure; the waveguide-like feed structure comprises a second dielectric plate, wherein a first copper clad layer is laid on the upper surface of the second dielectric plate, and a gap is etched in the middle of the first copper clad layer; a microstrip feeder line is arranged on the lower surface of the second dielectric plate, extends from one end of the second dielectric plate to the middle of the second dielectric plate and crosses the gap; the antenna radiation structure comprises a first dielectric plate, and the upper surface of the first dielectric plate is provided with angle-cutting patches which are arranged periodically.
Further, the utility model also discloses a preferred structure of ISGW feed gap coupling super surface circular polarized antenna, the gap is a rectangular gap, the rectangular gap is etched in the middle of the first copper clad layer; the microstrip feed lines completely cross the rectangular slot.
Furthermore, a first copper-clad layer is arranged on the lower surface of the first dielectric plate, and the first dielectric plate, the corner cut patch and the first copper-clad layer form an antenna radiation structure.
Further, the corner cutting patch is formed by symmetrically cutting two corners on a diagonal line on the basis of a square patch, and the cut corners are isosceles triangles.
Furthermore, the second dielectric plate, the microstrip feeder line on the lower surface of the second dielectric plate, and the first copper clad layer on the upper surface of the second dielectric plate jointly form a waveguide-like feed structure; the microstrip feed provides energy to the entire antenna radiating structure.
Further, a third dielectric plate is arranged between the waveguide-like feed structure and the electromagnetic band gap structure, and the third dielectric plate isolates the waveguide-like feed structure from the electromagnetic band gap structure.
Further, the electromagnetic band gap structure comprises a fourth dielectric slab, and a second copper clad layer is arranged on the lower surface of the fourth dielectric slab; the upper surface of the fourth dielectric plate is printed with periodically arranged circular patches, through holes are formed in the fourth dielectric plate between the circular patches and the second copper clad layer, and the axes of the through holes and the circle center of the circular patches are on the same straight line.
Furthermore, a metal sheet is arranged on the side wall of the through hole, a metal through hole is formed, and the second copper-clad layer is communicated with the circular patch through the metal through hole.
Furthermore, the circular patches printed on the upper surface of the fourth dielectric plate, the metal via holes arranged periodically and the second copper clad layer on the lower surface of the fourth dielectric plate together form a mushroom-shaped electromagnetic band gap structure; the fourth dielectric plate can prevent the energy transmitted by the copper clad layer and the microstrip feeder line from leaking.
Further, the first dielectric plate, the second dielectric plate and the third dielectric plate are made of materials with a dielectric constant of 2.2 and a loss tangent of 0.0009; the fourth dielectric plate is made of a material with a dielectric constant of 4.4 and a loss tangent of 0.02; the total size of the antenna is 12mm 0.1.362 mm.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. according to the integrated substrate gap waveguide feed gap coupling super-surface linear polarization antenna, the energy transmission characteristic of a millimeter wave frequency band is improved by introducing the integrated substrate gap waveguide structure, and the radiation performance of the antenna is improved by introducing the super-surface structure;
2. by integrating the antenna on the substrate, the thickness of the antenna is greatly reduced, the gain of the antenna is improved, and the broadband of the antenna is improved.
Drawings
FIG. 1 is a schematic diagram of an integrated substrate gap waveguide feed gap coupled super-surface circularly polarized antenna structure;
FIG. 2 is a schematic diagram of an integrated substrate gap waveguide feed gap coupled corner cut patch for a super-surface circularly polarized antenna;
FIG. 3 shows simulation results of return loss, gain and axial ratio of the integrated substrate gap waveguide feed gap coupled super-surface circularly polarized antenna;
FIG. 4 is a directional diagram of an integrated substrate gap waveguide feed slot coupled super-surface circularly polarized antenna.
The labels in the figure are: the dielectric substrate comprises a first dielectric plate 1, a second dielectric plate 2, a third dielectric plate 3, a fourth dielectric plate 4, a corner cut patch 5, a rectangular slot 6, a first copper clad layer 7, a microstrip feeder 8, a circular patch 9, a metal via 10 and a second copper clad layer 11.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
as shown in fig. 1, the present invention includes a first dielectric plate 1, a second dielectric plate 2, a third dielectric plate 3, and a fourth dielectric plate 4; the first dielectric plate 1, the second dielectric plate 2, the third dielectric plate 3 and the fourth dielectric plate 4 are pressed together to form a whole. The ISGW Substrate Integrated Gap Waveguide is an abbreviation of (Substrate Integrated Gap Waveguide, SIGW).
The upper surface of the first dielectric plate 1 is provided with a plurality of periodically arranged corner-cut patches 5 as a radiation structure, and the upper surface of the second dielectric plate 2 is provided with a first copper-clad layer 7 as a ground of the antenna.
As shown in fig. 2, the corner cut patch 5 is formed by symmetrically cutting off two corners on a diagonal line on the basis of a square patch, and the cut-off corners are isosceles triangles. The corner cut patches 5 are obtained by cutting the same isosceles right triangles on the opposite corners of the square patches, and the circular polarization characteristic is realized by changing the equivalent impedance.
The integrated substrate gap waveguide structure is composed of a second dielectric plate 2, a third dielectric plate 3 and a fourth dielectric plate 4; a first copper clad layer 7 is arranged on the upper surface of the second dielectric plate 2, and a microstrip feeder line 8 is printed on the lower surface of the second dielectric plate 2; a rectangular gap 6 is etched on the first copper clad layer 7; the third dielectric plate 3 is a blank dielectric plate and is used for separating the second dielectric plate 2 from the fourth dielectric plate 4; the upper surface of the fourth dielectric plate 4 is printed with circular patches 9 which are periodically arranged, the fourth dielectric plate 4 is provided with metal via holes 10 which are periodically arranged, and the lower surface is provided with a second copper clad layer 11.
The upper surface of the second dielectric plate 2 is provided with a first copper coating layer 7, the lower surface of the second dielectric plate 2 is printed with a micro-strip feeder line 8, and the second dielectric plate 2, the first copper coating layer 7 and the micro-strip feeder line 8 jointly form a waveguide-like feed structure for transmitting energy.
The periodic circular patches 9 printed on the upper surface of the fourth dielectric plate 4, the periodic metal via holes 10 on the fourth dielectric plate 4 and the second copper clad layer 11 on the lower surface form a mushroom-shaped electromagnetic band gap structure, and the whole fourth dielectric plate 4 is equivalent to an ideal magnetic conductor and can prevent the energy transmitted by the first copper clad layer 7 and the microstrip feeder line 8 from leaking.
The upper surface of the fourth dielectric plate 4 is printed with a circular patch 9, metal through holes 10 are punched on the circular patch 9, and the circular patch 9 and the metal through holes 10 are in one-to-one correspondence and are concentric.
In order to make the mushroom-shaped electromagnetic band gap structure work in a required frequency band in the integrated substrate gap waveguide structure, the sizes of the circular patch 9 and the metal through hole 10 are properly selected to determine a stop band of the mushroom-shaped electromagnetic band gap structure so as to enable the stop band to be matched with the working frequency band of the antenna.
According to the integrated substrate gap waveguide feed gap coupling super-surface linear polarization antenna, the energy transmission characteristic of a millimeter wave frequency band is improved by introducing the integrated substrate gap waveguide structure, and the radiation performance of the antenna is improved by introducing the super-surface structure.
By integrating the antenna on the substrate, the thickness of the antenna is greatly reduced, the gain of the antenna is improved, and the broadband of the antenna is improved.
Example 2:
as described in embodiment 1 above, the first dielectric plate 1, the second dielectric plate 2, and the third dielectric plate 3 are made of a material having a dielectric constant of 2.2 and a loss tangent of 0.0009; the fourth dielectric plate 4 is made of a material having a dielectric constant of 4.4 and a loss tangent of 0.02. The total size of the antenna is 12mm 0.1.362 mm.
The return loss, gain and axial ratio simulation results shown in figure 3 show that the utility model relates to an ISGW feed gap coupling super surface circular polarized antenna central frequency 28.08GHz, -10dB impedance bandwidth is 25.34GHz-30.81GHz, absolute bandwidth 5.47GHz, relative bandwidth 19.5%, 3dB axial ratio bandwidth is 28.15GHz-32.28GHz, absolute bandwidth 4.13GHz, relative bandwidth 14.7%, and impedance bandwidth in-band gain reaches 8.9dBi-10.35 dBi.
As shown in fig. 4, it can be seen from the diagram that the antenna is a directional diagram, and it can be seen from the directional diagram that when the electromagnetic radiation intensity of the E-plane perpendicular to the first dielectric plate 1 and parallel to the microstrip feed line 8 is in the direction of 0 °, the radiation intensity reaches the maximum; when the electromagnetic radiation intensity of the H surface which is perpendicular to the first dielectric plate 1 and parallel to the rectangular gap 6 is in the direction of 0 degrees, the radiation intensity reaches the maximum.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An ISGW feed gap coupling super-surface circularly polarized antenna is characterized in that: the antenna radiation structure and the integrated substrate gap waveguide structure are sequentially arranged and overlapped from top to bottom by adopting a PCB technology; the integrated substrate gap waveguide structure comprises an electromagnetic band gap structure and a waveguide-like feed structure used for transmitting energy to the antenna radiation structure; the waveguide-like feed structure comprises a second dielectric plate (2), wherein a first copper coating layer (7) is laid on the upper surface of the second dielectric plate (2), and a gap is etched in the middle of the first copper coating layer (7); a microstrip feeder line (8) is arranged on the lower surface of the second dielectric plate (2), and the microstrip feeder line (8) extends from one end of the second dielectric plate (2) to the middle of the second dielectric plate (2) and crosses the gap; the antenna radiation structure comprises a first dielectric plate (1), and the upper surface of the first dielectric plate (1) is provided with angle-cutting patches (5) which are arranged periodically.
2. The ISGW-fed slot-coupled super-surface circularly polarized antenna of claim 1, wherein: the gap is a rectangular gap (6), and the rectangular gap (6) is etched in the middle of the first copper coating layer (7); the microstrip feed line (8) completely crosses the rectangular slot (6).
3. An ISGW fed slot coupled super-surface circularly polarized antenna as claimed in claim 1 or 2, wherein: the antenna comprises a first dielectric plate (1), a first copper clad layer (7) is arranged on the lower surface of the first dielectric plate (1), and an antenna radiation structure is formed by the first dielectric plate (1), a corner cut patch (5) and the first copper clad layer (7).
4. The ISGW feed slot-coupled super-surface circularly polarized antenna of claim 3, wherein: the corner cutting patch (5) is formed by symmetrically cutting off two corners on a diagonal line on the basis of a square patch, and the cut-off corners are isosceles triangles.
5. The ISGW feed slot-coupled super-surface circularly polarized antenna of claim 4, wherein: the second dielectric plate (2), the microstrip feeder (8) on the lower surface of the second dielectric plate (2) and the first copper clad layer (7) on the upper surface of the second dielectric plate (2) jointly form a waveguide-like feed structure; the microstrip feed line (8) provides energy to the entire antenna radiating structure.
6. The ISGW feed slot-coupled super-surface circularly polarized antenna of claim 4, wherein: a third dielectric plate (3) is arranged between the waveguide-like feed structure and the electromagnetic band gap structure, and the third dielectric plate (3) isolates the waveguide-like feed structure from the electromagnetic band gap structure.
7. The ISGW feed slot-coupled super-surface circularly polarized antenna of claim 6, wherein: the electromagnetic band gap structure comprises a fourth dielectric plate (4), and a second copper clad layer (11) is arranged on the lower surface of the fourth dielectric plate (4); the upper surface of the fourth dielectric plate (4) is provided with circular patches (9) printed with periodic arrangement, through holes are formed in the fourth dielectric plate (4) between the circular patches (9) and the second copper clad layer (11), and the axes of the through holes and the circle center of the circular patches (9) are on the same straight line.
8. The ISGW-fed slot-coupled super-surface circularly polarized antenna of claim 7, wherein: the side wall of the through hole is provided with a metal sheet and forms a metal through hole (10), and the second copper clad layer (11) is communicated with the circular patch (9) through the metal through hole (10).
9. The ISGW-fed slot-coupled super-surface circularly polarized antenna of claim 8, wherein: the circular patches (9) printed on the upper surface of the fourth dielectric plate (4), the metal through holes (10) arranged periodically and the second copper-clad layer (11) on the lower surface of the fourth dielectric plate (4) together form a mushroom-shaped electromagnetic band gap structure; the fourth dielectric plate (4) can prevent the energy transmitted by the copper clad layer (7) and the microstrip feed line (8) from leaking.
10. The ISGW feed slot-coupled super-surface circularly polarized antenna as claimed in any one of claims 7 to 9, wherein the first dielectric plate (1), the second dielectric plate (2), and the third dielectric plate (3) are made of a material having a dielectric constant of 2.2 and a loss tangent of 0.0009, the fourth dielectric plate (4) is made of a material having a dielectric constant of 4.4 and a loss tangent of 0.02, and the total size of the antenna is 12mm ＊ 12mm ＊ 0.1.362 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920844966.1U CN210272668U (en) | 2019-06-05 | 2019-06-05 | ISGW feed gap coupling super-surface circularly polarized antenna |
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| CN201920844966.1U CN210272668U (en) | 2019-06-05 | 2019-06-05 | ISGW feed gap coupling super-surface circularly polarized antenna |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113540810A (en) * | 2021-06-23 | 2021-10-22 | 中国科学院国家空间科学中心 | Microstrip slot coupling super-surface antenna with open rectangular ring loaded |
| CN114243274A (en) * | 2021-12-20 | 2022-03-25 | 杭州电子科技大学 | Differential feed circularly polarized super-surface antenna with wide axial ratio bandwidth |
| CN115084856A (en) * | 2022-07-21 | 2022-09-20 | 广东工业大学 | Low-profile high-isolation super-surface microstrip patch antenna and wireless communication equipment |
| CN115275622A (en) * | 2022-09-30 | 2022-11-01 | 盛纬伦(深圳)通信技术有限公司 | Slotted gap waveguide antenna and preparation method thereof |
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2019
- 2019-06-05 CN CN201920844966.1U patent/CN210272668U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113540810A (en) * | 2021-06-23 | 2021-10-22 | 中国科学院国家空间科学中心 | Microstrip slot coupling super-surface antenna with open rectangular ring loaded |
| CN114243274A (en) * | 2021-12-20 | 2022-03-25 | 杭州电子科技大学 | Differential feed circularly polarized super-surface antenna with wide axial ratio bandwidth |
| CN114243274B (en) * | 2021-12-20 | 2024-02-06 | 杭州电子科技大学 | Differential feed circularly polarized super-surface antenna with wide axial ratio bandwidth |
| CN115084856A (en) * | 2022-07-21 | 2022-09-20 | 广东工业大学 | Low-profile high-isolation super-surface microstrip patch antenna and wireless communication equipment |
| CN115084856B (en) * | 2022-07-21 | 2022-11-01 | 广东工业大学 | Low-profile high-isolation super-surface microstrip patch antenna and wireless communication equipment |
| CN115275622A (en) * | 2022-09-30 | 2022-11-01 | 盛纬伦(深圳)通信技术有限公司 | Slotted gap waveguide antenna and preparation method thereof |
| CN115275622B (en) * | 2022-09-30 | 2023-04-25 | 盛纬伦(深圳)通信技术有限公司 | Slotted gap waveguide antenna and preparation method thereof |
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