CN201117805Y - Low contour back cavity annular gap one-point short circuit circular-polarization antenna - Google Patents
Low contour back cavity annular gap one-point short circuit circular-polarization antenna Download PDFInfo
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- CN201117805Y CN201117805Y CNU2007201916330U CN200720191633U CN201117805Y CN 201117805 Y CN201117805 Y CN 201117805Y CN U2007201916330 U CNU2007201916330 U CN U2007201916330U CN 200720191633 U CN200720191633 U CN 200720191633U CN 201117805 Y CN201117805 Y CN 201117805Y
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Abstract
The utility model relate to a low-outline carinal-cavity circular-ring seam point short-circuit circular polarization antenna. The prior circular-ring seam point short-circuit-based carinal-cavity circular polarization has complicate structure, large volume and high cost, and fails to realize the plane integration. Two sides of a medium substrate of the utility model are plated with a metal layer, an upper metal layer is etched with a microstrip line that is used for feeding and a co-grounding and co-plane waveguide transmission line, a middle metal strip of the co-plane waveguide transmission line is extent outwards to be a microstrip line. A plurality of metalation through holes that are arranged in the rectangular form are arranged on the upper metal layer, the medium substrate and the lower metal layer to form a cavity body, and the co-plane waveguide transmission line is stretched into the cavity body. The area, corresponding to the cavity body, of the lower metal layer, is etched with a one-point short-circuited circular-ring radiation seam. Compared with the prior carinal-cavity circular polarization antenna that is composed of the metal cavity body, the antenna of the utility model has low production cost, can realize the seamless integration with the microstrip circuit, and improves the integration of the system.
Description
Technical field
The utility model 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 utility model provides 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 utility model 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.
Low profile rear cavity ring gap one-point short circuit round polarization antenna of the present utility model 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.
This circular polarized antenna 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 that with common PCB technology manufacturing speed is fast, and is with low cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a perspective view of the present utility model;
Fig. 3 is the metal-layer structure schematic diagram of going up of the present utility model;
Fig. 4 is a lower metal layer structural representation of the present utility model;
Fig. 5 is the return loss emulation of the utility model one embodiment and the comparison diagram of test result;
Fig. 6 is the emulation testing result's of the axial ratio of the utility model one embodiment and gain a comparison diagram;
Fig. 7 is the utility model one embodiment test result figure of antenna pattern in the X-Y plane when 12GHz;
Fig. 8 is the utility model one embodiment 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 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 (1)
1, a kind of 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; 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 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201916330U CN201117805Y (en) | 2007-11-12 | 2007-11-12 | Low contour back cavity annular gap one-point short circuit circular-polarization antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201916330U CN201117805Y (en) | 2007-11-12 | 2007-11-12 | Low contour back cavity annular gap one-point short circuit circular-polarization antenna |
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| CN201117805Y true CN201117805Y (en) | 2008-09-17 |
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| CNU2007201916330U Expired - Fee Related CN201117805Y (en) | 2007-11-12 | 2007-11-12 | Low contour back cavity annular gap one-point short circuit circular-polarization antenna |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777696A (en) * | 2010-03-08 | 2010-07-14 | 东南大学 | Coplanar waveguide liquid crystal polymer cylinder antenna |
| CN102509894A (en) * | 2011-10-11 | 2012-06-20 | 李亚丁 | Small circularly polarized high gain antenna with reduced sidelobe |
| CN103500883A (en) * | 2013-09-29 | 2014-01-08 | 西安电子科技大学 | Broadband substrate integrated waveguide circularly polarized antenna |
| CN103531918A (en) * | 2013-09-29 | 2014-01-22 | 西安电子科技大学 | Broadband substrate integrated waveguide circularly polarized antenna array and manufacturing method thereof |
| CN104167602A (en) * | 2014-01-06 | 2014-11-26 | 上海大学 | Q-band one-way broadband millimeter wave circular polarization slot antenna |
-
2007
- 2007-11-12 CN CNU2007201916330U patent/CN201117805Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777696A (en) * | 2010-03-08 | 2010-07-14 | 东南大学 | Coplanar waveguide liquid crystal polymer cylinder antenna |
| CN102509894A (en) * | 2011-10-11 | 2012-06-20 | 李亚丁 | Small circularly polarized high gain antenna with reduced sidelobe |
| CN103500883A (en) * | 2013-09-29 | 2014-01-08 | 西安电子科技大学 | Broadband substrate integrated waveguide circularly polarized antenna |
| CN103531918A (en) * | 2013-09-29 | 2014-01-22 | 西安电子科技大学 | Broadband substrate integrated waveguide circularly polarized antenna array and manufacturing method thereof |
| CN103500883B (en) * | 2013-09-29 | 2015-07-01 | 西安电子科技大学 | Broadband substrate integrated waveguide circularly polarized antenna |
| CN104167602A (en) * | 2014-01-06 | 2014-11-26 | 上海大学 | Q-band one-way broadband millimeter wave circular polarization slot antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20101112 |