CN101170213A - Low profile rear cavity ring gap one-point short circuit round polarization antenna - Google Patents
Low profile rear cavity ring gap one-point short circuit round polarization antenna Download PDFInfo
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- CN101170213A CN101170213A CNA2007101566882A CN200710156688A CN101170213A CN 101170213 A CN101170213 A CN 101170213A CN A2007101566882 A CNA2007101566882 A CN A2007101566882A CN 200710156688 A CN200710156688 A CN 200710156688A CN 101170213 A CN101170213 A CN 101170213A
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Abstract
The invention relates to a cavity-backed circular polarization antenna of an annular slot one-point short circuit with low profile. The prior cavity-backed circular polarization antenna based on annular slot one-point short circuit has complicated structure, large volume, non-planar integration, as well as high cost. Two surfaces of a medium substrate of the invention are plated with metal layers, the upper metal layer is etched with a micro-strip line used for feeding, and a common ground and coplanar waveguide transmission line, and as the micro-strip line, the middle metal belt of the coplanar waveguide transmission line extends outwardly. The upper metal layer, the medium substrate, and the lower metal layer are opened with a plurality of metallized through holes arranged as a circularity, so as to form a cavity, and the coplanar waveguide transmission line dives into the cavity. The lower metal layer is etched with a circular ring shaped radiation slot of one-point short circuit in corresponding cavity area. Compared with the cavity-backed circular polarization antenna composed by the prior metal cavity, the invention adopts common PCB process to manufacture, the manufacturing cost is low, and can realize seamless integration with the micro-strip circuit, thereby improving systemic integrated level.
Description
Technical field
The invention belongs to microwave technical field, relate to a kind of low profile rear cavity ring gap one-point short circuit round polarization antenna that constitutes based on substrate integrated waveguide technology, can be used as the antenna of radio frequency receiving and transmitting front end, be widely used in wireless communication systems such as mobile communication, satellite communication, radar, be used to solve the polarization mismatch problem that Faraday electromagnetism rotation effect etc. causes, can also play the effect that misty rain disturbs and anti-multipath reflects that suppresses simultaneously.
Background technology
As the critical component of communication system, antenna is widely used in the radio communication occasion.Because the Faraday rotation effect of radio wave propagation in the space, and the uncertainty of the reception antenna position in the mobile communication, if adopt traditional single-polarized antenna, need the dual-mode antenna Polarization match to aim at and to realize reception preferably as Transmit-Receive Unit.And the constant amplitude rotating field that circular polarized antenna radiates can be decomposed into two quadrature linear polarization ripples that the amplitude equal phase differs 90 degree, is widely used in the problem that solves polarization mismatch in the radio communication.Simultaneously because the rotation direction of circularly polarised wave when inciding symmetrical target reverses characteristic, circular polarized antenna is applied to mobile communication, satellite communication field and also plays and suppress that misty rain disturbs and the effect of anti-multipath reflection.Therefore design high performance circular polarized antenna and not only can avoid polarization mismatch and obtain good reception, can greatly alleviate the index pressure of follow-up radio circuit simultaneously, significantly improve the performance of system, the cost of reduction system.Have the wireless communications application occasion of strict restriction especially in satellite communication, radio-frequency (RF) identification equal-volume weight, the high-performance circular polarized antenna that design has low profile is even more important.
The implementation of circular polarized antenna is varied, comprises several forms such as micro-strip paster antenna, microstrip gap slot antenna, Waveguide slot slot antenna, back-cavity circularly polarized antenna and helical antenna.The circular polarized antenna of little band forms has the easily conformal advantage of low profile, is most widely used.Its feeding classification mainly contains slit coupling feed and coaxial waveguide feed dual mode, and wherein coupling feed in slit mainly adopts multi-layer PCB technology to realize, the high and technology of price is not very stable for domestic technology.Though and the coaxial feed mode is simple, it can not be seamless integrated with planar circuit, causes volume bigger.Waveguide slot fluting circular polarized antenna is applicable to the array antenna application, and single radiating element volume is little, forms the array volume compact, it is narrow that array antenna has main lobe width, directional diagram can figuration, the low good characteristic that waits of cross polarization level, and it is medium to be widely used in the microwave and millimeter wave radar communications system.But the antenna volume that is based on the conventional metals guide technology is big, and the processing technology complexity is with high costs, has limited being extensive use of of it; Back-cavity circularly polarized antenna generally is to be made of the additional metallic cavity in the feed of realizing on the planar substrates, radiating element and the back side, the gain height of this antenna, and directionality is good, but same processed complex cost height, volume is big.Propose on substrate, to press the mode of engaged column bars to constitute cavity body structure in order to address these problems people such as Sievenpiper, coaxially in place it is carried out feed and form back-cavity circularly polarized antenna thereby adopt simultaneously.This implementation and former back-cavity circularly polarized antenna specific volume mutually reduce greatly, but its processing cost is still higher, and be equally can't the plane integrated; In the middle of used in the space that helical antenna is mainly used in earth station and satellite link, it had advantages such as gain is high, axial ratio is low, axial ratio bandwidth is big, but its 3 D stereo spiral radiation structures shape its have shortcomings such as volume is greatly can't the plane integrated.The present Research of comprehensive circular polarized antenna at present still needs to study the high-performance circular polarized antenna that the new construction of adopting new technology is realized low-cost low profile as can be known.
Summary of the invention
The purpose of this invention is to provide a kind of low profile rear cavity ring gap one-point short circuit round polarization antenna that constitutes based on substrate integrated waveguide technology, this novel circular polarized antenna radiance is good, gain is high, profile is low, but seamless flat surface is integrated, and is simple in structure, is easy to design, be easy to processing, cost is low.This circular polarized antenna and existing back-cavity circularly polarized antenna based on ring-like gap one-point short circuit specific volume mutually reduce greatly, and manufacturing cost significantly reduces.
Low profile rear cavity ring gap one-point short circuit round polarization antenna of the present invention comprises dielectric substrate, and the two sides of dielectric substrate is coated with metal level, is respectively to go up metal level and lower metal layer, and wherein lower metal layer is as the stratum; Last metal level etching is useful on the microstrip line and the coplanar waveguide transmission line of feed, and coplanar waveguide transmission line is a common ground coplanar waveguide structure, and metal band stretches out in the middle of it, as microstrip line; Run through metal level, dielectric substrate and lower metal layer and have through hole, through-hole wall is coated with metal, forms plated-through hole; A plurality of plated-through hole sequence arrangement are circular, form circular substrate integrated wave-guide cavity wave, and the pitch of holes of the adjacent metal through hole of formation circular substrate integrated wave-guide cavity wave is identical; Coplanar waveguide transmission line stretches in the substrate integrated wave-guide cavity wave, and the center of circle of substrate integrated wave-guide cavity wave is positioned on the center line of metal band of coplanar waveguide transmission line; Lower metal layer etching in the zone of substrate integrated wave-guide cavity wave has the annular radiating slot of one-point short circuit, radiating slot is provided with substrate integrated wave-guide cavity wave is concentric, and the line in the center of short dot and the center of circle of radiating slot is vertical with the center line of metal band in the feed structure.
The diameter of described plated-through hole less than the centre frequency of antenna work corresponding air wavelength 1/10th, the ratio of the hole heart distance of the diameter of plated-through hole and adjacent two plated-through holes is greater than 0.5.
Low profile rear cavity ring gap one-point short circuit round polarization antenna of the present invention is to be equivalent to the substrate integrated wave-guide cavity wave structure in conventional metals chamber by the manufacturing of employing substrate integrated waveguide technology on common dielectric substrate, thereby has greatly reduced the volume of back-cavity circularly polarized antenna.With traditional cavity-backed radiator antenna need accurate machining different be that this new antenna comprises that feeding network can adopt common PCB technology to make, cost of manufacture significantly reduces, and can realize seamless integrated with microstrip circuit.Structurally, substrate is the dielectric substrate with double-sided metallic, to be interval with a series of metal through holes uniformly, forms the circular substrate integrated wave-guide cavity wave that is equivalent to the conventional metals cavity on dielectric substrate.The metal level etching is used for the microstrip line of feed on double-sided metallic, by coplanar waveguide structure electromagnetic wave is introduced circular substrate integrated wave-guide cavity wave then.Etching has the annular radiating slot of one-point short circuit in the corresponding substrate integrated wave-guide cavity wave of the lower metal layer zone of double-sided metallic, can the electromagnetic radiation energy.
Concrete operation principle: electromagnetic wave is introduced in the circular substrate integrated wave-guide cavity wave that is made of substrate integrated waveguide technology by coplanar waveguide transmission line by feed microstrip line again, thereby has encouraged the resonance of a plurality of patterns in the cavity.Because cavity is the structure of two-dimensional symmetric, two mutually orthogonal degenerate modes of second order therefore will inevitably have been encouraged.Can separate two mutually orthogonal degeneracy modes of resonance with width by the position of regulating short dot on the ring gap this moment, thereby and by the slit formation antenna is gone out in energy emission.Regulate the size of cavity, the radius of ring gap and the position and the width of short dot and can will be adjusted into 90 degree, thereby make the electromagnetic wave that radiate form circular polarization by the electromagnetic phase difference that mutually orthogonal mode of resonance radiate in the frequency of needs.
Beneficial effect: the low profile rear cavity ring gap one-point short circuit round polarization antenna that constitutes based on substrate integrated waveguide technology has the following advantages:
A. this novel back-cavity circularly polarized antenna has kept the good radiation characteristic of traditional metal backing cavity circularly polarized antenna high-gain etc., simultaneously entire antenna comprises that back of the body cavity configuration and feeding network can realize on same dielectric substrate, make that not only antenna volume reduces greatly, and entire antenna can be seamless integrated with system complete plane, improved the integrated level of system.
B. this novel back-cavity circularly polarized antenna is simple in structure, and entire infrastructure is realized on a common dielectric substrate.In design process, only need to regulate the radius of radiating slot, the position of short dot, and the radius of the circular substrate integrated wave-guide cavity wave that is made of metal throuth hole just can obtain needed performance.Structural parameters are few, the time that has shortened design greatly and optimized.
C. this novel back-cavity circularly polarized antenna is made simple and convenient, just can realize with common PCB technology.Compare with the precision machined cavity-backed radiator antenna of traditional needs, manufacturing speed is fast, and is with low cost.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a perspective view of the present invention;
Fig. 3 is the metal-layer structure schematic diagram of going up of the present invention;
Fig. 4 is a lower metal layer structural representation of the present invention;
Fig. 5 is the return loss emulation of one embodiment of the invention and the comparison diagram of test result;
Fig. 6 is the emulation testing result's of the axial ratio of one embodiment of the invention and gain a comparison diagram;
Fig. 7 is one embodiment of the invention test result figure of antenna pattern in the X-Y plane when 12GHz;
Fig. 8 is one embodiment of the invention test result figure of antenna pattern in the X-Z plane when 12GHz;
Embodiment
As illustrated in fig. 1 and 2, the low profile rear cavity ring gap one-point short circuit round polarization antenna comprises that thickness is 0.5 millimeter Rogers5880 dielectric substrate 1, the two sides of dielectric substrate 1 is coated with metal level, is respectively to go up metal level 7 and lower metal layer 8, and wherein lower metal layer 8 is as the stratum.As Fig. 3, last metal level 7 etchings are useful on the microstrip line 2 and the coplanar waveguide transmission line 3 (dashed rectangle comprises part) of feed, and coplanar waveguide transmission line 3 is common ground coplanar waveguide structures, and metal band stretches out in the middle of it, as microstrip line 2.The length of microstrip line 2 and width are respectively 4 millimeters and 1.45 millimeters, and the width of two air gaps of coplanar waveguide transmission line 3 is 0.7 millimeter, and length is 8.2 millimeters.Running through metal level 7, dielectric substrate 1 and lower metal layer 8, to have diameter be 1 millimeter through hole, and through-hole wall is coated with metal, forms plated-through hole 4.A plurality of plated-through hole 4 sequence arrangement are that radius is 11.9 millimeters a circle, form circular substrate integrated wave-guide cavity wave, and the pitch of holes of plated-through hole 4 arrays of formation circular substrate integrated wave-guide cavity wave is identical, is 1.35 millimeters.Coplanar waveguide transmission line 3 stretches in the substrate integrated wave-guide cavity wave, and its top is apart from 6.0 millimeters at the center of cavity, and the center line of intermetallic metal band overlaps with a diameter of substrate integrated wave-guide cavity wave.As Fig. 4, it is that 1 millimeter radius is 6.2 millimeters that lower metal layer 8 etching in the zone of substrate integrated wave-guide cavity wave has width, the annular radiating slot 5 that the center of circle overlaps with the center of circle of circular substrate integrated wave-guide cavity wave.Have length and be 1.0 millimeters one-point short circuit 6 (the broken circle frame comprises part) on annular radiating slot 5, the center of one-point short circuit 6 is vertical with the center line of metal band in the feed structure with the line in the center of circle of radiating slot.
The concrete structure geometric parameter is as follows:
R wherein
cBe the radius of substrate integrated wave-guide circular cavity wave, L
MsAnd W
MsBe respectively the length and the width of feed microstrip line, L
CpwAnd g
CpwBe respectively the length and the width in co-planar waveguide slit, r
sAnd W
sBe respectively the radius and the width in circular slit, a
sBe the length of short dot on the circular slit, L
cBe the distance between the co-planar waveguide top and the cavity center of circle, α is the angle of line between the center line of feed metal band and the short dot and the center of circle, circular slit, and d is a through-hole diameter, d
pBe the hole heart distance of through hole, h is a substrate thickness.
L
ms(mm)4.0 W
ms(mm)1.45
L
cpw(mm)8.2 g
cpw(mm)0.7
r
s(mm)6.2 W
s(mm)1.0
α
s(mm)0.8 α(deg)90
L
c(mm)6.0 r
c(mm)11.9
d(mm)1.0 d
p(mm)1.35
h(mm)0.5
The concrete manufacture process of this common face wave guide single-point feedback rear cavity round polarization antenna is: the substrate of at first choosing corresponding parameter, metal level etches microstrip line and the coplanar waveguide transmission line that is used for feed on substrate, the ring gap of suitable position etching one-point short circuit on the lower metal layer of substrate then, on whole substrate, beat a series of metal through holes with uniform interval, the circular substrate integrated wave-guide cavity wave that the formation center overlaps with the center of circle, circular slit at last around the one-point short circuit ring gap.Select suitable aperture and pitch of holes, avoid the cavity self-energy outwards to reveal.This novel back-cavity circularly polarized antenna has kept the radiation characteristic of the high-gain of conventional metals back-cavity circularly polarized antenna.Select the size of the radiating slot and the circular substrate integrated wave-guide cavity wave of suitable size, can regulate the operating frequency of this antenna easily.Entire antenna can be fully seamless integrated with system fully by common PCB technology realization.
Fig. 5 is the test result of this circular polarized antenna performance to Fig. 8.Fig. 5 emulation testing result shows this antenna emittance effectively in centre frequency is the working band of 12GHz.Fig. 6 emulation testing result all shows this antenna 3dB axial ratio bandwidth 90MHz in working band, and gain is up to 8.0dBi.The directional diagram test result surface of Fig. 7～8 this antenna when operating frequency 12GHz all presents good right-handed circular polarization radiation characteristic in X-Y plane still is the X-Z plane, gain is high, and directionality is good, and cross polarization level is low.
Claims (2)
1. the low profile rear cavity ring gap one-point short circuit round polarization antenna comprises dielectric substrate, it is characterized in that: the two sides of dielectric substrate is coated with metal level, is respectively to go up metal level and lower metal layer, and wherein lower metal layer is as the stratum; Last metal level etching is useful on the microstrip line and the coplanar waveguide transmission line of feed, and coplanar waveguide transmission line is a common ground coplanar waveguide structure, and metal band stretches out in the middle of it, as microstrip line; Run through metal level, dielectric substrate and lower metal layer and have through hole, through-hole wall is coated with metal, forms plated-through hole; A plurality of plated-through hole sequence arrangement are circular, form circular substrate integrated wave-guide cavity wave, and the pitch of holes of the adjacent metal through hole of formation circular substrate integrated wave-guide cavity wave is identical; Coplanar waveguide transmission line stretches in the substrate integrated wave-guide cavity wave, and the center of circle of substrate integrated wave-guide cavity wave is positioned on the center line of metal band of coplanar waveguide transmission line; Lower metal layer etching in the zone of substrate integrated wave-guide cavity wave has the annular radiating slot of one-point short circuit, radiating slot is provided with substrate integrated wave-guide cavity wave is concentric, and the line in the center of short dot and the center of circle of radiating slot is vertical with the center line of metal band in the feed structure.
2. low profile rear cavity ring gap one-point short circuit round polarization antenna as claimed in claim 1, the diameter that it is characterized in that described plated-through hole less than the centre frequency of antenna work corresponding air wavelength 1/10th, the ratio of the hole heart distance of the diameter of plated-through hole and adjacent two plated-through holes is greater than 0.5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101566882A CN101170213B (en) | 2007-11-12 | 2007-11-12 | Low profile rear cavity ring gap one-point short circuit round polarization antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101566882A CN101170213B (en) | 2007-11-12 | 2007-11-12 | Low profile rear cavity ring gap one-point short circuit round polarization antenna |
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| CN101170213A true CN101170213A (en) | 2008-04-30 |
| CN101170213B CN101170213B (en) | 2011-10-05 |
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| CN102074795A (en) * | 2011-01-21 | 2011-05-25 | 杭州电子科技大学 | Dual circular polarization reconfigurable antenna |
| CN102157789A (en) * | 2011-02-12 | 2011-08-17 | 厦门大学 | Improved Cantor fractal microstrip antenna with distributed loading coupling cavity |
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| CN105071031A (en) * | 2015-08-11 | 2015-11-18 | 中国电子科技集团公司第五十四研究所 | Open-ring circularly-polarized back cavity antenna |
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- 2007-11-12 CN CN2007101566882A patent/CN101170213B/en not_active Expired - Fee Related
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| CN102074795A (en) * | 2011-01-21 | 2011-05-25 | 杭州电子科技大学 | Dual circular polarization reconfigurable antenna |
| CN102157789A (en) * | 2011-02-12 | 2011-08-17 | 厦门大学 | Improved Cantor fractal microstrip antenna with distributed loading coupling cavity |
| CN102157789B (en) * | 2011-02-12 | 2014-01-29 | 厦门大学 | Improved Cantor fractal microstrip antenna with distributed loading coupling cavity |
| CN103515710A (en) * | 2013-08-07 | 2014-01-15 | 南京信息职业技术学院 | Dual-frequency-band slot antenna based on half-mode substrate integrated waveguide |
| CN103515710B (en) * | 2013-08-07 | 2015-04-08 | 南京信息职业技术学院 | Dual-frequency-band slot antenna based on half-mode substrate integrated waveguide |
| CN105071031B (en) * | 2015-08-11 | 2017-10-20 | 中国电子科技集团公司第五十四研究所 | Split ring circular polarisation cavity-backed radiator antenna |
| CN105071031A (en) * | 2015-08-11 | 2015-11-18 | 中国电子科技集团公司第五十四研究所 | Open-ring circularly-polarized back cavity antenna |
| CN105514600A (en) * | 2016-02-04 | 2016-04-20 | 东南大学 | Carinal cavity gap circularly polarized antenna adopting half module substrate integrated waveguide |
| CN105514600B (en) * | 2016-02-04 | 2019-05-31 | 东南大学 | A kind of back chamber gap circular polarized antenna using half module substrate integrated wave guide |
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| CN108808233B (en) * | 2018-06-06 | 2024-01-30 | 中天宽带技术有限公司 | High-gain broadband dual-polarized patch antenna |
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| CN109768377A (en) * | 2019-02-26 | 2019-05-17 | 重庆邮电大学 | A kind of three frequency of millimeter wave, three polarization substrate integration wave-guide antenna |
| CN109888475A (en) * | 2019-02-26 | 2019-06-14 | 重庆邮电大学 | A kind of millimeter wave dual-band dual-circular polarization substrate integration wave-guide antenna |
| CN109768377B (en) * | 2019-02-26 | 2021-06-18 | 重庆邮电大学 | Millimeter wave three-frequency three-polarization substrate integrated waveguide antenna |
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| CN112751185A (en) * | 2020-12-29 | 2021-05-04 | 瑞声新能源发展(常州)有限公司科教城分公司 | Antenna unit, antenna device and electronic terminal |
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| CN113922091A (en) * | 2021-09-24 | 2022-01-11 | 南京邮电大学 | Dual-frequency broadband filtering antenna based on microstrip patch and substrate integrated waveguide resonator |
| CN113922091B (en) * | 2021-09-24 | 2023-12-12 | 南京邮电大学 | Dual-frequency broadband filter antenna based on microstrip patch and substrate integrated waveguide resonator |
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Application publication date: 20080430 Assignee: ZHEJIANG DONGANG ELECTRONIC TECHNOLOGY CO., LTD. Assignor: Hangzhou Electronic Science and Technology Univ Contract record no.: 2014330000086 Denomination of invention: Low profile rear cavity ring gap one-point short circuit round polarization antenna Granted publication date: 20111005 License type: Exclusive License Record date: 20140414 |
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Granted publication date: 20111005 Termination date: 20201112 |