CN209880807U - SIGW circular polarized antenna - Google Patents
SIGW circular polarized antenna Download PDFInfo
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- CN209880807U CN209880807U CN201920111719.0U CN201920111719U CN209880807U CN 209880807 U CN209880807 U CN 209880807U CN 201920111719 U CN201920111719 U CN 201920111719U CN 209880807 U CN209880807 U CN 209880807U
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- 239000002184 metal Substances 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 230000005855 radiation Effects 0.000 claims abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 24
- 229910052802 copper Inorganic materials 0.000 claims description 24
- 239000010949 copper Substances 0.000 claims description 24
- 239000004020 conductor Substances 0.000 claims description 6
- 230000005684 electric field Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 abstract description 5
- 230000010354 integration Effects 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000010287 polarization Effects 0.000 description 4
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
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Abstract
The SIGW circular polarized antenna of the utility model adopts three dielectric plates to form a substrate integrated gap waveguide antenna; the SIGW is composed of three dielectric plates: a bottom dielectric plate with electromagnetic band gap, an upper dielectric plate with metal coating and a middle dielectric plate (gap) separating the upper and lower dielectric plates. A rectangular metal gap is etched on a metal layer of an upper dielectric plate of the SIGW, and the microstrip line extending to the lower portion of the rectangular gap is adopted to excite the rectangular gap to generate circularly polarized radiation, so that the SIGW circularly polarized antenna is formed. The utility model discloses SIGW circular polarized antenna has simple structure, and the interference killing feature is strong, workable, and easy integration, advantages such as bandwidth broad can be used as 5G millimeter wave communication system antenna.
Description
Technical Field
The utility model belongs to wireless communication antenna relates to the SIGW circular polarized antenna based on PCB.
Background
The circularly polarized antenna has good compatibility and good anti-interference capability, and is widely applied to a plurality of different scenes such as navigation satellites, radars, mobile communication and the like. Up to now, there have been many reports on circularly polarized antennas operating in the millimeter wave band. These antennas can be broadly classified into microstrip circular polarization antennas, metal Rectangular Waveguide (RW) circular polarization antennas, and Substrate Integrated Waveguide (SIW) circular polarization antennas. However, in the case of millimeter-wave band applications, conventional circularly polarized antennas have problems, such as difficulty in manufacturing a pure metal structure in the millimeter-wave band, weak electromagnetic shielding performance of a Substrate Integrated Waveguide (SIW), and complex structure.
In recent years, a Substrate Integrated Gap Waveguide (SIGW) transmission line, which is implemented based on a multi-layer PCB, is proposed, being divided into two structures of a ridged SIGW and a microstrip SIGW. The ridged SIGW is generally composed of two layers of PCBs, the outer side surface of the upper layer of PCB is fully coated with copper to form an ideal electric conductor (PEC), the lower layer of PCB is printed with a microstrip line, the microstrip line is provided with a series of metalized through holes and is connected with a lower metal ground to form a ridged structure, and periodic mushroom structures are arranged on two sides of the microstrip line to form an ideal magnetic conductor (PMC). Due to the EBG formed between the PEC and the PMC, electromagnetic waves (quasi-TEM waves) can only propagate along microstrip lines. However, the micro-strip ridge and the mushroom structure in the SIGW with the ridge are on the same layer of the PCB, so the micro-strip ridge is restricted by the mushroom structure and inconvenient to route, and there is a limitation in practical application.
The microstrip SIGW is composed of three layers of PCB boards. The outer side of the upper layer PCB is fully covered with copper to form a PEC, the inner side of the upper layer PCB is printed with a microstrip line, the bottom layer PCB is completely printed with a mushroom-shaped periodic structure to form a PMC, and a blank dielectric plate (middle layer) is inserted between the upper layer and the bottom layer to separate the upper layer and the bottom layer. Due to the partition of the middle layer, the microstrip line layout is flexible, and the microstrip line layout is not limited by a periodic structure. When such a SIGW is operating, quasi-TEM waves will propagate along the microstrip line within the dielectric substrate between the microstrip line and the PEC, in a mode very similar to that of a dielectric buried microstrip line. Similarly, EBGs are generated between the PEC and the PMC to block the propagation of waves in other directions to guarantee the propagation of quasi-TEM waves along the microstrip lines.
The utility model discloses integrated clearance waveguide's of substrate circular polarized antenna adopts microstrip SIGW technical design circular polarized antenna, solves the current circular polarized antenna structure based on PCB technical design complicated, the weak shortcoming of electromagnetic shield performance.
The content of the utility model, through the literature search, does not see the same public report with the utility model.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a circular polarized antenna of integrated clearance waveguide of substrate for overcome current circular polarized antenna structure complicacy, electromagnetic shielding performance shortcoming such as not strong, can be applied to 5G millimeter wave communication system's working wave band.
The utility model discloses SIGW circular polarized antenna, a serial communication port, including the three-layer dielectric plate: upper dielectric plate (1), intermediate level dielectric plate (2), lower floor's dielectric plate (3), wherein:
a. the upper surface of the upper dielectric plate (1) is printed with a first copper clad layer (9); a rectangular gap (8) is etched on the first copper clad layer (9), and a feed microstrip line (6) is printed on the lower surface of the first copper clad layer; the feed microstrip line (6) extends to the lower part of the rectangular gap;
b. a circular patch (10) on the upper surface of the lower dielectric plate (3), and a second copper clad layer (4) printed on the lower surface of the lower dielectric plate; a metal through hole (5) is drilled on the lower dielectric plate (3) and forms an EBG structure array together with the circular patch (10) on the upper surface;
c. the middle-layer dielectric plate (2) separates the upper-layer dielectric plate (1) from the lower-layer dielectric plate (3) to form a gap between the upper-layer dielectric plate (1) and the lower-layer dielectric plate (3);
d. the upper dielectric plate (1), the middle dielectric plate (2) and the lower dielectric plate (3) are bonded together to form a whole;
e. the first copper-clad layer (9) on the upper dielectric plate (1) is PEC, and the lower dielectric plate (3) is equivalent to PMC;
f. the dielectric plate comprises an upper dielectric plate (1), a middle dielectric plate (2), a lower dielectric plate (3), a first copper clad layer (9) and a feed microstrip line (6) which are printed on the upper dielectric plate, a mushroom-shaped EBG array structure manufactured on the lower dielectric plate, and a second copper clad layer (4) printed on the lower dielectric plate, wherein the SIGW structure is formed.
A rectangular gap (8) is formed in a first copper clad layer (9) of an upper dielectric slab (1) of the substrate integrated gap waveguide, a feed microstrip line extends to the position below the rectangular gap (8), and an included angle of 45 degrees is formed between the rectangular gap (8) and the feed microstrip line (6).
A feed microstrip line (6) on the lower surface of the upper dielectric slab (1) extends to the lower part of the rectangular gap (8) to excite the gap to generate radiation; when the feed microstrip line (6) extends to the middle position of the gap, better return loss and axial ratio can be obtained; when the length-width ratio of the rectangular slot (8) is fixed and the length of the feed microstrip line (6) is lengthened or shortened, the return loss change is large, but the axial ratio change is small.
An included angle of 45 degrees is formed between the rectangular slot (8) and the feed microstrip line (6) to generate two orthogonal electric field components to form circularly polarized electromagnetic waves.
In order to obtain a required working frequency band, the sizes of the circular patch (5) and the metal via hole (10) in the mushroom-shaped EBG structure and the period of the mushroom-shaped EBG structure are properly selected, so that the stop band of the EBG structure is adapted to the electromagnetic wave frequency band transmitted by the SIGW;
when the ratio of the wide side to the long side is 0.75, a better axial ratio result can be obtained; when the value of the long side of the rectangular gap (8) is fixed and the values of the wide side and the long side of the rectangular gap (8) are increased, the frequency point where the minimum axial ratio is located moves to the low-frequency end, and the in-band axial ratio is increased; when the values of the wide side and the long side of the rectangular gap (8) are reduced, the frequency point where the minimum axial ratio is located moves to the high-frequency end, and the in-band axial ratio is also increased.
Compared with the prior art, the utility model, have following advantage:
1. the structure is simple;
2. the bandwidth is wide;
3. the electromagnetic shielding performance is strong;
4. easy integration with other planar circuits.
Drawings
Fig. 1 is a schematic diagram of the structure of the SIGW circular polarized antenna of the present invention.
Fig. 2 is a schematic top view of the upper dielectric plate (1) of the SIGW circularly polarized antenna of the present invention.
Fig. 3 is a schematic view of the lower surface of the upper dielectric plate (1) of the SIGW circularly polarized antenna of the present invention.
Fig. 4 is a schematic top view of the lower dielectric plate (1) of the SIGW circular polarized antenna of the present invention.
Fig. 5 is a schematic view of the lower surface of the lower dielectric plate (1) of the SIGW circular polarized antenna of the present invention.
Fig. 6 shows the return loss, axial ratio and gain of the SIGW circular polarized antenna of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1, the present invention is directed to a substrate integrated gap waveguide circularly polarized antenna,
the utility model discloses SIGW circular polarized antenna, a serial communication port, including the three-layer dielectric plate: upper dielectric plate (1), intermediate level dielectric plate (2), lower floor's dielectric plate (3), wherein:
a. the upper surface of the upper dielectric plate (1) is printed with a first copper clad layer (9); a rectangular gap (8) is etched on the first copper clad layer (9), and a feed microstrip line (6) is printed on the lower surface of the first copper clad layer; the feed microstrip line (6) extends to the lower part of the rectangular gap;
b. a circular patch on the upper surface of the lower dielectric plate (3), and a second copper clad layer (4) printed on the lower surface; a metal through hole (5) is drilled on the lower dielectric plate (3) and forms an Electromagnetic Band Gap (EBG) structure array together with the circular patch (10) on the upper surface;
c. the middle-layer dielectric plate (2) separates the upper-layer dielectric plate (1) from the lower-layer dielectric plate (3) to form a gap between the upper-layer dielectric plate (1) and the lower-layer dielectric plate (3);
d. the upper dielectric plate (1), the middle dielectric plate (2) and the lower dielectric plate (3) are bonded together to form a whole;
e. the first copper clad layer (9) on the upper dielectric plate (1) is an ideal electric conductor (PEC), and the lower dielectric plate (3) is equivalent to an ideal magnetic conductor (PMC);
f. the Substrate Integrated Gap Waveguide (SIGW) structure comprises an upper dielectric slab (1), a middle dielectric slab (2), a lower dielectric slab (3), a first copper clad layer (9) and a feed microstrip line (6) printed on the upper dielectric slab, a mushroom-shaped EBG array structure manufactured on the lower dielectric slab, and a second copper clad layer (4) printed on the lower dielectric slab.
A rectangular gap (8) is formed in a first copper clad layer (9) of an upper dielectric slab (1) of the substrate integrated gap waveguide, a feed microstrip line extends to the position below the rectangular gap (8), and an included angle of 45 degrees is formed between the rectangular gap (8) and the feed microstrip line (6).
A feed microstrip line (6) on the lower surface of the upper dielectric slab (1) extends to the lower part of the rectangular gap (8) to excite the gap to generate radiation; when the feed microstrip line (6) extends to the middle position of the gap, better return loss and axial ratio can be obtained; when the length-width ratio of the rectangular slot (8) is fixed and the length of the feed microstrip line (6) is lengthened or shortened, the return loss change is large, but the axial ratio change is small.
An included angle of 45 degrees is formed between the rectangular slot (8) and the feed microstrip line (6) to generate two orthogonal electric field components to form circularly polarized electromagnetic waves.
When the ratio of the wide side to the long side is 0.75, a better axial ratio result can be obtained; when the value of the long side of the rectangular gap (8) is fixed and the values of the wide side and the long side of the rectangular gap (8) are increased, the frequency point where the minimum axial ratio is located moves to the low-frequency end, and the in-band axial ratio is increased; when the values of the wide side and the long side of the rectangular gap (8) are reduced, the frequency point where the minimum axial ratio is located moves to the high-frequency end, and the in-band axial ratio is also increased.
Further, in order to illustrate the feasibility of the above-described scheme, a specific example is given below. In the example, when the ratio of the wide side to the long side of the rectangular gap (8) on the upper dielectric slab (1) is 0.75, better gain and matching effect can be obtained; the rectangular slot (8) on the upper dielectric plate (1) and the feed microstrip line (6) form a 45-degree included angle to generate two orthogonal electric field components required by circular polarization, and the mushroom-shaped EBG structure on the lower dielectric plate (3) is a 6 x 7 array. In the example, the upper dielectric plate (1) and the middle dielectric plate (2) are both made of Rogers5880 plates with the thicknesses of 0.508mm and 0.254mm respectively, and the lower PCB plate is Rogers 4003C with the thickness of 0.813 mm; simulation and test results show that the-10 dB impedance bandwidth of the antenna is 24.8-31.7 GHz, the 3dB axial ratio bandwidth is 27.3-28.8 GHz (about 5.3%), and the gain is about 6dBi at 28 GHz. .
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art.
Claims (6)
- The SIGW circularly polarized antenna is characterized by comprising three layers of dielectric plates: upper dielectric plate (1), intermediate level dielectric plate (2), lower floor's dielectric plate (3), wherein:a. the upper surface of the upper dielectric plate (1) is printed with a first copper clad layer (9); a rectangular gap (8) is etched on the first copper clad layer (9), and a feed microstrip line (6) is printed on the lower surface of the first copper clad layer; the feed microstrip line (6) extends to the lower part of the rectangular gap;b. a circular patch on the upper surface of the lower dielectric plate (3), and a second copper clad layer (4) printed on the lower surface; a metal through hole (5) is drilled on the lower dielectric plate (3) and forms an Electromagnetic Band Gap (EBG) structure array together with the circular patch (10) on the upper surface;c. the middle-layer dielectric plate (2) separates the upper-layer dielectric plate (1) from the lower-layer dielectric plate (3) to form a gap between the upper-layer dielectric plate (1) and the lower-layer dielectric plate (3);d. the upper dielectric plate (1), the middle dielectric plate (2) and the lower dielectric plate (3) are bonded together to form a whole;e. a first copper-clad layer (9) on the upper dielectric plate (1) is an ideal electric conductor PEC, and a lower dielectric plate (3) is an ideal magnetic conductor PMC;f. the dielectric plate comprises an upper dielectric plate (1), a middle dielectric plate (2), a lower dielectric plate (3), a first copper clad layer (9) and a feed microstrip line (6) which are printed on the upper dielectric plate, a mushroom-shaped electromagnetic band gap EBG array structure manufactured on the lower dielectric plate, and a second copper clad layer (4) printed on the lower dielectric plate, wherein the SIGW structure is formed.
- 2. The SIGW circularly polarized antenna of claim 1, wherein: a rectangular gap (8) is formed in a first copper clad layer (9) of an upper dielectric slab (1) of the substrate integrated gap waveguide, a feed microstrip line extends to the position below the rectangular gap (8), and an included angle of 45 degrees is formed between the rectangular gap (8) and the feed microstrip line (6).
- 3. The SIGW circularly polarized antenna of claim 1, wherein: a feed microstrip line (6) on the lower surface of the upper dielectric slab (1) extends to the lower part of the rectangular gap (8) to excite the gap to generate radiation; when the feed microstrip line (6) extends to the middle position of the gap, better return loss and axial ratio can be obtained; when the length-width ratio of the rectangular slot (8) is fixed, the influence of adjusting the length of the feed microstrip line (6) on return loss is large, but the influence on the ratio is small.
- 4. The SIGW circularly polarized antenna of claim 1, wherein: an included angle of 45 degrees is formed between the rectangular slot (8) and the feed microstrip line (6) to generate two orthogonal electric field components to form circularly polarized electromagnetic waves.
- 5. The SIGW circularly polarized antenna of claim 1, wherein: in order to obtain the required working frequency band, the sizes of the circular patch (10) and the metal via hole (5) in the mushroom-shaped electromagnetic band gap EBG structure and the period of the mushroom-shaped electromagnetic band gap EBG structure are properly selected, so that the stop band of the electromagnetic band gap EBG structure is adapted to the electromagnetic wave frequency band transmitted by the SIGW.
- 6. The SIGW circularly polarized antenna of claim 1, wherein: when the ratio of the wide side to the long side is 0.75, a better axial ratio result can be obtained; when the value of the long side of the rectangular gap (8) is fixed and the values of the wide side and the long side of the rectangular gap (8) are increased, the frequency point where the minimum axial ratio is located moves to the low-frequency end, and the in-band axial ratio is increased; when the values of the wide side and the long side of the rectangular gap (8) are reduced, the frequency point where the minimum axial ratio is located moves to the high-frequency end, and the in-band axial ratio is also increased.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821130893 | 2018-07-17 | ||
| CN2018211308931 | 2018-07-17 |
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| Publication Number | Publication Date |
|---|---|
| CN209880807U true CN209880807U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920111719.0U Withdrawn - After Issue CN209880807U (en) | 2018-07-17 | 2019-01-23 | SIGW circular polarized antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109616764A (en) * | 2018-07-17 | 2019-04-12 | 云南大学 | Substrate integrates gap waveguide circular polarized antenna |
| CN112134012A (en) * | 2020-10-20 | 2020-12-25 | 北京华通嘉业科技有限公司 | Circularly polarized antenna and circularly polarized array antenna |
-
2019
- 2019-01-23 CN CN201920111719.0U patent/CN209880807U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109616764A (en) * | 2018-07-17 | 2019-04-12 | 云南大学 | Substrate integrates gap waveguide circular polarized antenna |
| CN109616764B (en) * | 2018-07-17 | 2024-01-19 | 云南大学 | Substrate integrated gap waveguide circularly polarized antenna |
| CN112134012A (en) * | 2020-10-20 | 2020-12-25 | 北京华通嘉业科技有限公司 | Circularly polarized antenna and circularly polarized array antenna |
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Granted publication date: 20191231 Effective date of abandoning: 20240119 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20191231 Effective date of abandoning: 20240119 |
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| AV01 | Patent right actively abandoned |