CN104795638A - Dual-band circularly-polarized co-aperture microstrip antenna - Google Patents
Dual-band circularly-polarized co-aperture microstrip antenna Download PDFInfo
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- CN104795638A CN104795638A CN201510225206.9A CN201510225206A CN104795638A CN 104795638 A CN104795638 A CN 104795638A CN 201510225206 A CN201510225206 A CN 201510225206A CN 104795638 A CN104795638 A CN 104795638A
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Abstract
The invention discloses a dual-band circularly-polarized co-aperture microstrip antenna small in size and good in integrity. The dual-band circularly-polarized co-aperture microstrip antenna comprise a K-band square ring patch antenna and a Ka-band square ring patch antenna and is miniaturized; the two antennas of different frequencies are disposed in the same plane by coplanar nesting, thus sectional height of the antenna is decreased and the size of the antenna is reduced; additionally, by the use of a K-band coupler patch and the use of two-point feedback manner, the axial ratio performance of the K-band antenna is improved, and the axial ratio width is widened; a shield cavity composed of an array of metal through holes is arranged around metalized through holes, thus the metalized through holes and the shield cavity form a coaxial structure, inductive effect caused by the metalized through holes is eliminated and other possible radiations are shielded; therefore, overall performance of the antenna is guaranteed. The antenna is suitable for popularization and application in the technical field of antennas.
Description
Technical field
The present invention relates to antenna technical field, be specifically related to a kind of two-band circular polarization Shared aperture microstrip antenna.
Background technology
Common reflector is the aerial array form be integrated in by the antenna of different frequency range and polarization under same bore.Adopt common reflector can make the astronomical cycle of how secondary difference in functionality in same space, separately lay with multiple antenna and compare, this form saves shared space greatly, makes whole communication system compacter.The design of common reflector can adopt microstrip antenna, doublet structure, helical antenna structure, parabola and helical antenna etc.But because microstrip antenna has the advantage of light, easy to process, the low section of quality, Yi Zuzhen.So most common reflector is all adopt microstrip structure.At present no matter make antenna in the electronic equipment such as radar system or communication system when significantly not increasing the volume and weight of antenna in the demand of different frequency and different polarization mode work all in continuous increase.Therefore the research of Shared aperture microstrip antenna has important practical significance.
The advantage of common reflector mainly makes antenna carrier space be utilized effectively, and enables the antenna working in different frequency or difference in functionality share same bore and can normally work.But closely multiple antenna is installed in relative narrow space, usually can cause between antenna producing close coupling, thus make antenna performance deterioration even cause some antenna normally to work.The design difficulty of common reflector is large, if the advantage that not can solve mutually isolated problem between each antenna so Shared aperture will exhaust.
Design at present about two-band Shared aperture microstrip antenna structure can be roughly divided into following three types: (1) coplanar nested structure.The antenna element of high frequency band is embedded into low-band antenna unit inside and realizes two-band Shared aperture microstrip antenna.(2) lamination open-celled structure.The antenna element of high frequency band is positioned over immediately below low-frequency range perforate and forms double frequency Shared aperture microstrip antenna.(3) pilotaxitic texture.Utilize the gap between low-frequency range antenna element, the antenna element of a high band is embedded between multiple low-frequency range antenna element.But still there is the problems such as size is large, alien frequencies section antenna interference is strong in traditional double frequency Shared aperture microstrip antenna.Especially in the field (as satellite communication) needing the work of antenna circular polarization, traditional feed structure is unfavorable for the design of Shared aperture, and axial ratio bandwidth is also usually difficult to satisfy the demands, and the overall performance of antenna is poor.
Summary of the invention
Technical problem to be solved by this invention is to provide the less and overall performance good two-band circular polarization Shared aperture microstrip antenna of a kind of size.
The present invention solves the problems of the technologies described above adopted technical scheme: this two-band circular polarization Shared aperture microstrip antenna, comprise the first medium substrate be cascading from top to bottom, second medium substrate, 3rd medium substrate, the lower surface of described first medium substrate is provided with the first metal layer, the upper surface of described first medium substrate is provided with K frequency range coupler paster, described K frequency range coupler paster has the first rectangular pins and the second rectangular pins, described first rectangular pins is provided with the first coaxial feed joint, second rectangular pins is provided with the second coaxial feed joint, the upper surface of described second medium substrate is provided with the second metal level, the upper surface of described 3rd medium substrate is provided with K frequency range Q-RING paster, Ka frequency range Q-RING paster, first rectangular patch, second rectangular patch, 3rd rectangular patch, what described Ka frequency range Q-RING paster was nested is arranged on inside K frequency range Q-RING paster, described first rectangular patch is arranged on inside Ka frequency range Q-RING paster, second rectangular patch, 3rd rectangular patch is separately positioned on outside K frequency range Q-RING paster, described first rectangular patch is provided with the 3rd coaxial feed joint, described second medium substrate is provided with the first plated-through hole and the second plated-through hole, described first plated-through hole runs through second medium substrate, 3rd medium substrate, the upper end of described first plated-through hole is connected with the second rectangular patch, the lower end of the first plated-through hole is connected with K frequency range coupler paster, described second plated-through hole runs through second medium substrate, 3rd medium substrate, the upper end of described second plated-through hole is connected with the 3rd rectangular patch, the lower end of the second plated-through hole is connected with K frequency range coupler paster, described first medium substrate is provided with the first metal throuth hole array and the second metal throuth hole array, described first metal throuth hole array runs through first medium substrate, second medium substrate, described first metal throuth hole array is looped around the first plated-through hole surrounding and the upper end of the first metal throuth hole array is connected with the second metal level, the lower end of the first metal throuth hole array is connected with the first metal layer, described second metal throuth hole array is looped around the second plated-through hole surrounding and the upper end of the second metal throuth hole array is connected with the second metal level, the lower end of the second metal throuth hole array is connected with the first metal layer, described Ka frequency range Q-RING paster is by the first rectangular patch couple feed, described K frequency range Q-RING paster is by the second rectangular patch, 3rd rectangular patch couple feed.
Further, described first medium substrate and second medium substrate all adopt relative dielectric constant to be 2.2, and thickness is Rogers 5880 dielectric-slab of 0.254mm.
Further, described 3rd medium substrate adopts relative dielectric constant to be 2.2, and thickness is Rogers 5880 dielectric-slab of 0.787mm.
Beneficial effect of the present invention: the miniaturization of this two-band circular polarization Shared aperture microstrip antenna by adopting K frequency range Q-RING paster antenna and Ka frequency range Q-RING paster antenna can realize antenna, dimension reduction 1/3rd compared with traditional rectangular patch antenna, and by coplanar nested form, the antenna of two different frequencies is arranged on the section height that same plane reduces antenna, further reduce the size of antenna, in addition, by adopting K frequency range coupler paster and using the mode of 2 feeds to improve the axial ratio performance of K band antenna, widen axial ratio bandwidth, simultaneously by arranging the shielding cavity surrounded by metal throuth hole array around plated-through hole, plated-through hole and shielding cavity is made to constitute a coaxial line structure, thus eliminate the inductive effect that plated-through hole brings, also shield its issuable radiation simultaneously, therefore the overall performance of antenna is protected, moreover, this two-band circular polarization Shared aperture microstrip antenna can adopt ripe PCB technology manufacture, there is cost low, precision is high, reproducible, easy processing, the feature of easy Planar integration, mass production manufacture can be realized.
Accompanying drawing explanation
Fig. 1 is the structural representation of two-band circular polarization Shared aperture microstrip antenna of the present invention;
Fig. 2 is the end view of two-band circular polarization Shared aperture microstrip antenna of the present invention;
Fig. 3 be two-band circular polarization Shared aperture microstrip antenna of the present invention overlook physical dimension schematic diagram;
Fig. 4 is the side-looking physical dimension schematic diagram of two-band circular polarization Shared aperture microstrip antenna of the present invention;
Fig. 5 is the K frequency range input reflection coefficient simulation result of two-band circular polarization Shared aperture microstrip antenna of the present invention;
Fig. 6 is the antenna pattern of K frequency range in Phi=0 ° and Phi=90 ° of plane of two-band circular polarization Shared aperture microstrip antenna of the present invention;
Fig. 7 is that the K frequency range axial ratio of two-band circular polarization Shared aperture microstrip antenna of the present invention is with frequency variation curve;
Fig. 8 is the Ka frequency range input reflection coefficient simulation result of two-band circular polarization Shared aperture microstrip antenna of the present invention;
Fig. 9 is the antenna pattern of Ka frequency range in Phi=0 ° and Phi=90 ° of plane of two-band circular polarization Shared aperture microstrip antenna of the present invention;
Figure 10 is that the Ka frequency range axial ratio of two-band circular polarization Shared aperture microstrip antenna of the present invention is with frequency variation curve;
Description of symbols in figure: first medium substrate 1, the first metal layer 2, K frequency range coupler paster 3, first coaxial feed joint 4, second coaxial feed joint 5, second medium substrate 6, second metal level 7, 3rd medium substrate 8, K frequency range Q-RING paster 9, Ka frequency range Q-RING paster 10, first rectangular patch 11, second rectangular patch 12, 3rd rectangular patch 13, 3rd coaxial feed joint 14, first plated-through hole 15, second plated-through hole 16, first metal throuth hole array 17, second metal throuth hole array 18.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As Fig. 1, described in 2, this two-band circular polarization Shared aperture microstrip antenna, comprise the first medium substrate 1 be cascading from top to bottom, second medium substrate 6, 3rd medium substrate 8, the lower surface of described first medium substrate 1 is provided with the first metal layer 2, the upper surface of described first medium substrate 1 is provided with K frequency range coupler paster 3, described K frequency range coupler paster 3 has the first rectangular pins and the second rectangular pins, described first rectangular pins is provided with the first coaxial feed joint 4, second rectangular pins is provided with the second coaxial feed joint 5, the upper surface of described second medium substrate 6 is provided with the second metal level 7, the upper surface of described 3rd medium substrate 8 is provided with K frequency range Q-RING paster 9, Ka frequency range Q-RING paster 10, first rectangular patch 11, second rectangular patch 12, 3rd rectangular patch 13, what described Ka frequency range Q-RING paster 10 was nested is arranged on inside K frequency range Q-RING paster 9, described first rectangular patch 11 is arranged on inside Ka frequency range Q-RING paster 10, second rectangular patch 12, 3rd rectangular patch 13 is separately positioned on outside K frequency range Q-RING paster 9, described first rectangular patch 11 is provided with the 3rd coaxial feed joint 14, described second medium substrate 6 is provided with the first plated-through hole 15 and the second plated-through hole 16, described first plated-through hole 15 runs through second medium substrate 6, 3rd medium substrate 8, the upper end of described first plated-through hole 15 is connected with the second rectangular patch 12, the lower end of the first plated-through hole 15 is connected with K frequency range coupler paster 3, described second plated-through hole 16 runs through second medium substrate 6, 3rd medium substrate 8, the upper end of described second plated-through hole 16 is connected with the 3rd rectangular patch 13, the lower end of the second plated-through hole 16 is connected with K frequency range coupler paster 3, described first medium substrate 1 is provided with the first metal throuth hole array 17 and the second metal throuth hole array 18, described first metal throuth hole array 17 runs through first medium substrate 1, second medium substrate 6, described first metal throuth hole array 17 is looped around the first plated-through hole 15 surrounding and the upper end of the first metal throuth hole array 17 is connected with the second metal level 7, the lower end of the first metal throuth hole array 17 is connected with the first metal layer 2, described second metal throuth hole array 18 is looped around the second plated-through hole 16 surrounding and the upper end of the second metal throuth hole array 18 is connected with the second metal level 7, the lower end of the second metal throuth hole array 18 is connected with the first metal layer 2, described Ka frequency range Q-RING paster 10 is by the first rectangular patch 11 couple feed, described K frequency range Q-RING paster 9 is by the second rectangular patch 12, 3rd rectangular patch 13 couple feed.The miniaturization of this two-band circular polarization Shared aperture microstrip antenna by adopting K frequency range Q-RING paster 9 antenna and Ka frequency range Q-RING paster 10 antenna can realize antenna, dimension reduction 1/3rd compared with traditional rectangular patch antenna, and by coplanar nested form, the antenna of two different frequencies is arranged on the section height that same plane reduces antenna, further reduce the size of antenna, in addition, by adopting K frequency range coupler paster 3 and using the mode of 2 feeds to improve the axial ratio performance of K band antenna, widen axial ratio bandwidth, simultaneously by arranging the shielding cavity surrounded by metal throuth hole array around plated-through hole, plated-through hole and shielding cavity is made to constitute a coaxial line structure, thus eliminate the inductive effect that plated-through hole brings, also shield its issuable radiation simultaneously, therefore the overall performance of antenna is protected, moreover, this two-band circular polarization Shared aperture microstrip antenna can adopt ripe PCB technology manufacture, there is cost low, precision is high, reproducible, easy processing, the feature of easy Planar integration, mass production manufacture can be realized.
Further, described first medium substrate 1 and second medium substrate 6 all adopt relative dielectric constant to be 2.2, and thickness is Rogers 5880 dielectric-slab of 0.254mm.Described 3rd medium substrate 8 adopts relative dielectric constant to be 2.2, and thickness is Rogers 5880 dielectric-slab of 0.787mm.
Embodiment
In the present embodiment, two-band circular polarization Shared aperture microstrip antenna is operated in K20GHz/Ka30GHz wave band.First medium substrate 1 and second medium substrate 6 adopt relative dielectric constant to be 2.2, Rogers 5880 dielectric-slab of thickness h 1=h2=0.254mm, 3rd medium substrate 8 adopt relative dielectric constant be 2.2, thickness h 3=0.787mm Rogers 5880 dielectric-slab, size is as shown in Figure 4.As shown in Figure 3, design parameter is as described below: as shown in Figure 3, and antenna is specifically of a size of: a1=3.3mm for the size of two-band circular polarization Shared aperture microstrip antenna, b1=2.6mm, L1=2mm, w1=0.3mm, s1=0.4mm, h1=0.254mm, h2=0.254mm, h3=0.787mm, a2=2.25mm, b2=1.85mm, L2=1mm, w2=0.2mm, s2=0.2mm, p=0.25mm.
This two-band circular polarization Shared aperture microstrip antenna K frequency range reflection coefficient as shown in Figure 5, owing to employing K frequency range coupler paster 3, so the impedance bandwidth of whole antenna is very wide, but the radiation bandwidth of its reality is narrow, and Fig. 5 give also the actual operating frequency scope of this antenna.Fig. 6 gives the antenna pattern of this antenna in Phi=0 ° and Phi=90 ° of plane, and its maximum gain is 6.7dB, and it can be comparable with traditional microstrip antenna.Antenna with frequency change axial ratio as shown in Figure 7, because the mode employing 2 feeds carries out feed to this antenna, therefore it has very wide axial ratio bandwidth scope, and in band of operation, axial ratio is all less than 2dB.
And this antenna Ka frequency range reflection coefficient as shown in Figure 8, its impedance bandwidth is 28.2 – 30GHz.Fig. 9 gives the antenna pattern of this antenna in Phi=0 ° and Phi=90 ° of plane, maximum gain is 7.8dB, its gain is higher than the gain of K band antenna, and this is on the one hand due to the antenna relative to K frequency range, corresponding to Ka band antenna floor electricity size larger; Be come its feed because K band antenna employs coupler on the other hand, and coupler itself have certain loss.Antenna with frequency change axial ratio as shown in Figure 10, owing to using the mode of single-point feedback to carry out feed to this antenna, therefore axial ratio bandwidth is much smaller than impedance bandwidth, and its axial ratio bandwidth is 29.5-29.9GHz.
Claims (3)
1. two-band circular polarization Shared aperture microstrip antenna, it is characterized in that: comprise the first medium substrate (1) be cascading from top to bottom, second medium substrate (6), 3rd medium substrate (8), the lower surface of described first medium substrate (1) is provided with the first metal layer (2), the upper surface of described first medium substrate (1) is provided with K frequency range coupler paster (3), described K frequency range coupler paster (3) has the first rectangular pins and the second rectangular pins, described first rectangular pins is provided with the first coaxial feed joint (4), second rectangular pins is provided with the second coaxial feed joint (5), the upper surface of described second medium substrate (6) is provided with the second metal level (7), the upper surface of described 3rd medium substrate (8) is provided with K frequency range Q-RING paster (9), Ka frequency range Q-RING paster (10), first rectangular patch (11), second rectangular patch (12), 3rd rectangular patch (13), what described Ka frequency range Q-RING paster (10) was nested is arranged on K frequency range Q-RING paster (9) inner side, described first rectangular patch (11) is arranged on Ka frequency range Q-RING paster (10) inner side, second rectangular patch (12), 3rd rectangular patch (13) is separately positioned on K frequency range Q-RING paster (9) outside, described first rectangular patch (11) is provided with the 3rd coaxial feed joint (14), described second medium substrate (6) is provided with the first plated-through hole (15) and the second plated-through hole (16), described first plated-through hole (15) runs through second medium substrate (6), 3rd medium substrate (8), the upper end of described first plated-through hole (15) is connected with the second rectangular patch (12), the lower end of the first plated-through hole (15) is connected with K frequency range coupler paster (3), described second plated-through hole (16) runs through second medium substrate (6), 3rd medium substrate (8), the upper end of described second plated-through hole (16) is connected with the 3rd rectangular patch (13), the lower end of the second plated-through hole (16) is connected with K frequency range coupler paster (3), described first medium substrate (1) is provided with the first metal throuth hole array (17) and the second metal throuth hole array (18), described first metal throuth hole array (17) runs through first medium substrate (1), second medium substrate (6), described first metal throuth hole array (17) is looped around the first plated-through hole (15) surrounding and the upper end of the first metal throuth hole array (17) is connected with the second metal level (7), the lower end of the first metal throuth hole array (17) is connected with the first metal layer (2), described second metal throuth hole array (18) is looped around the second plated-through hole (16) surrounding and the upper end of the second metal throuth hole array (18) is connected with the second metal level (7), the lower end of the second metal throuth hole array (18) is connected with the first metal layer (2), described Ka frequency range Q-RING paster (10) is by the first rectangular patch (11) couple feed, described K frequency range Q-RING paster (9) is by the second rectangular patch (12), 3rd rectangular patch (13) couple feed.
2. two-band circular polarization Shared aperture microstrip antenna as claimed in claim 1, it is characterized in that: described first medium substrate (1) and second medium substrate (6) all adopt relative dielectric constant to be 2.2, thickness is Rogers 5880 dielectric-slab of 0.254mm.
3. two-band circular polarization Shared aperture microstrip antenna as claimed in claim 2, is characterized in that: described 3rd medium substrate (8) adopts relative dielectric constant to be 2.2, and thickness is Rogers 5880 dielectric-slab of 0.787mm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856257A (en) * | 2015-12-09 | 2017-06-16 | 上海机电工程研究所 | Miniaturized dual-frequency antenna |
| CN108808233A (en) * | 2018-06-06 | 2018-11-13 | 深圳市深大唯同科技有限公司 | A kind of high-gain broadband dual-polarized patch antenna |
| CN111987465A (en) * | 2020-07-16 | 2020-11-24 | 北京自动化控制设备研究所 | Laminated satellite navigation microstrip antenna convenient to debug |
| CN113097718A (en) * | 2021-03-04 | 2021-07-09 | 西安交通大学 | Dual-frequency dual-circular-polarization common-caliber antenna for satellite communication |
| CN113113762A (en) * | 2021-03-12 | 2021-07-13 | 西安电子科技大学 | Dual-frequency dual-polarization common-aperture base station antenna and mobile communication system |
| CN114614257A (en) * | 2022-05-11 | 2022-06-10 | 电子科技大学 | Planar high-isolation K/Ka frequency band common-caliber phased array antenna |
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| CN103682601A (en) * | 2012-08-31 | 2014-03-26 | 电子科技大学 | Miniaturization shared-aperture dual-band circular polarization antenna |
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- 2015-05-06 CN CN201510225206.9A patent/CN104795638A/en active Pending
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| CN103682601A (en) * | 2012-08-31 | 2014-03-26 | 电子科技大学 | Miniaturization shared-aperture dual-band circular polarization antenna |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856257A (en) * | 2015-12-09 | 2017-06-16 | 上海机电工程研究所 | Miniaturized dual-frequency antenna |
| CN108808233A (en) * | 2018-06-06 | 2018-11-13 | 深圳市深大唯同科技有限公司 | A kind of high-gain broadband dual-polarized patch antenna |
| 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 |
| CN111987465A (en) * | 2020-07-16 | 2020-11-24 | 北京自动化控制设备研究所 | Laminated satellite navigation microstrip antenna convenient to debug |
| CN113097718A (en) * | 2021-03-04 | 2021-07-09 | 西安交通大学 | Dual-frequency dual-circular-polarization common-caliber antenna for satellite communication |
| CN113097718B (en) * | 2021-03-04 | 2022-07-12 | 西安交通大学 | Dual-frequency dual-circular-polarization common-caliber antenna for satellite communication |
| CN113113762A (en) * | 2021-03-12 | 2021-07-13 | 西安电子科技大学 | Dual-frequency dual-polarization common-aperture base station antenna and mobile communication system |
| CN113113762B (en) * | 2021-03-12 | 2022-05-03 | 西安电子科技大学 | Dual-frequency dual-polarization common-aperture base station antenna and mobile communication system |
| CN114614257A (en) * | 2022-05-11 | 2022-06-10 | 电子科技大学 | Planar high-isolation K/Ka frequency band common-caliber phased array antenna |
| CN114614257B (en) * | 2022-05-11 | 2022-07-29 | 电子科技大学 | Planar high-isolation K/Ka frequency band common-caliber phased array antenna |
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Application publication date: 20150722 |