CN105811102A - Miniature low-profile broadband dual-circular-polarization microstrip antenna - Google Patents
Miniature low-profile broadband dual-circular-polarization microstrip antenna Download PDFInfo
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- CN105811102A CN105811102A CN201610347651.7A CN201610347651A CN105811102A CN 105811102 A CN105811102 A CN 105811102A CN 201610347651 A CN201610347651 A CN 201610347651A CN 105811102 A CN105811102 A CN 105811102A
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- circle polarization
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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Abstract
The invention discloses a miniature low-profile broadband dual-circular-polarization microstrip antenna.The antenna is composed of a first dielectric substrate, a metal supporting frame, a second dielectric substrate and a third dielectric substrate.Parasitic metal surface-mounted devices are arranged on the upper surface and the lower surface of the first dielectric substrate, the surface-mounted device on the upper surface is larger than the surface-mounted device on the lower surface in size, and the surface-mounted devices are connected through four metalized through holes; a feed surface-mounted device is arranged on the upper surface of the second dielectric substrate; the third dielectric substrate comprises four strip lines, a 90-degree bridge, two feed probes and two radio frequency coaxial connectors.The 90-degree bridge and dual-feed technologies are adopted for realizing dual circular polarization, a laminated structure and a dual-parasitic surface-mounted device structure connected through the metalized through holes are adopted comprehensively to expand the bandwidth of the microstrip antenna, so that the bandwidth of the antenna reaches 19.4%, and the circular polarization ratio within the frequency band range is smaller than 1.3 dB; the antenna has miniature low-profile characteristics, and the size is 0.45 lambda0*0.45 lambda0*0.075 lambda0.
Description
Technical field
The present invention relates to the antenna technology of communication and navigation field, be specially a kind of miniaturization low section broadband double-circle polarization microstrip antenna.The present invention is suitable as the array element of phased array antenna, therefore suitable in the low section satellite mobile communication such as vehicle-mounted, airborne, bandwidth and circular polarisation performance requirement is higher occasion.
Background technology
Microstrip antenna has the advantages such as low section, lightweight and low cost, but its intrinsic narrow-band characteristic (general relative bandwidth is less than 5%) limits its range of application.People have employed a lot of technology and carry out broadening microstrip antenna bandwidth, as adopted the measures such as irregular metal patch, laminated construction.But adopt irregular metal patch to be difficult to design, and often affect the polarization performance of antenna；Adopt laminated construction design simple, it is easy to guarantee antenna polarization performance, but highly bad control.It addition, in order to realize circular polarisation, single feed point can be adopted to add perturbation paster structure, this kind of mode Circular polarization ratio narrower bandwidth；Multiple feeds technology also can be adopted to realize circular polarisation, be capable of wider Circular polarization ratio bandwidth by appropriate design feeding network.
Through patent retrieval, relevant patent closely-related with the present invention is specific as follows: the patent No.: CN200810114878.2, power feed stacked microstrip antenna array with circular polarized wide-band capacitor compensating probe, achieve the standing wave bandwidth more than 20% by laminated construction and capacitor compensating probe technology, but only achieve single circular polarisation；The patent No.: CN201010521963.8, the broadband circle polarized stacked microstrip antenna of a kind of single feedback and feeder equipment thereof, achieve the 3dB axial ratio bandwidth of 15.6% and antenna height by laminated construction > 0.14 λ0；The patent No.: CN201310444387.5, the low section air microstrip aerial of uhf band double frequency round polarized, it is possible to realize dual band operation, do not possess broadband character；The patent No.: CN201420045812.3, high wideband dual polarized microstrip antenna, antenna operating band is 5150～5850MHz, less than 13%, and is linear polarization；The patent No.: CN201420167391.1, a kind of broadband double-circle polarization microstrip antenna, it is possible to realizing double-circle polarization work, standing wave bandwidth reaches 56.5% but in frequency band, Circular polarization ratio has reached 6dB；The patent No.: CN201420206459.2, the double-circle polarization microstrip antenna of wideband wide scan, its three dB bandwidth is more than 40%, and in frequency band, axle ratio is less than 3dB, but antenna height has reached 0.42 λ0, the requirement of low section can not be met far away.
In sum, adopt the bandwidth of operation of some technical measures broadening microstrip antennas is easily realize in engineering, but often brings the circular polarization characteristics of antenna to be deteriorated, the problem such as antenna height increase.
Summary of the invention
It is an object of the invention to avoid the weak point in above-mentioned background technology, a kind of miniaturization low section broadband double-circle polarization microstrip antenna is provided, present invention achieves broadband and good double-circle polarization characteristic, and have the feature of miniaturization, low section, there is significantly high future in engineering applications.
The technology of the present invention solution is: a kind of miniaturization low section broadband double-circle polarization microstrip antenna, including the first medium substrate 3 being fixedly connected sequentially from top to bottom, metal support frame 7, second medium substrate 8 and the 3rd medium substrate 10；The upper surface corrosion of first medium substrate 3 is formed with the upper parasitic metal paster 4 that center is porose, the corrosion of its lower surface is formed with lower parasitic metal paster 5, the size of parasitic metal paster 5 and being connected by 4 plated-through holes 6 under being sized larger than of upper parasitic metal paster 4；4 plated-through holes 6 are about the centrosymmetry of first medium substrate 3；The upper surface corrosion of second medium substrate 8 is formed with fed patch 9；3rd medium substrate 10 is provided with 4 strip line, 12,2 feed probes 13 of 11,90 ° of electric bridges and 2 radio frequency (RF) coaxial connectors 2, the input of 90 ° of electric bridges 12 is connected with 2 radio frequency (RF) coaxial connector 2 one_to_one corresponding respectively through 2 strip lines 11 with isolation end, and its straight-through end is connected with 2 feed probes 13 one_to_one corresponding respectively through 2 strip lines 11 with coupled end；Fed patch 9 is connected by 2 plated-through holes and 2 feed probes 13 one_to_one corresponding.
Wherein, described upper parasitic metal paster 4, lower parasitic metal paster 5 and fed patch 9 are circle or square.
Wherein, the center of the lower parasitic metal paster 5 of first medium substrate 3 has cross crotch.
Wherein, described 90 ° of electric bridges 12 are 90 ° of electric bridge chips or 90 ° of electric bridge strip line networks.
Wherein, when 90 ° of electric bridges 12 are 90 ° of electric bridge chips, the center perforate of second medium substrate 8, this hole is used for holding 90 ° of electric bridge chips；The surrounding of 90 ° of electric bridge chips offers multiple plated-through hole.
Wherein, multiple plated-through hole is all offered around described feed probes and radio frequency (RF) coaxial connector.
Wherein, the volume of described miniaturization low section broadband double-circle polarization microstrip antenna is 0.45 λ0×0.45λ0×0.075λ0, wherein, λ0Centered by frequency electromagnetic at the wavelength of free-space propagation.
Wherein, the dielectric constant of described second medium substrate 8 is bigger than the dielectric constant of first medium substrate 3.
Wherein, the line at the center of two described feed probes 13 and fed patch 9 center is at an angle of 90.
The present invention compared with prior art has the advantage that
1, the present invention adopts fed patch and double-deck parasitic patch, produces multiple resonant frequency, through size and the spacing of each laminating sheet of appropriate design, makes multiple resonance band be connected as a single entity, the working band of broadening microstrip antenna.
2, the double-deck parasitic patch of the present invention is connected by four plated-through holes, and upper strata paster is more bigger than lower floor paster, empirical tests, compares separate two-layer parasitic patch structure, and this structure can greatly broadening working band.
3, the first medium substrate of the present invention and the dielectric constant of second medium substrate are relatively low, recycling metal frame construction air dielectric between the two, reduce further the effective dielectric constant of whole microstrip antenna, thus reducing quality factor, helping the working band of broadening antenna.
4, the present invention comprehensively adopts laminated construction and the double; two parasitic patch structures connected by plated-through hole so that the present invention has broadband character, and the relative bandwidth of ActiveVSWR≤2 reaches 19.4%.
5, the present invention adopts 90 ° of electric bridge chips and the double-fed point feeding technique of function admirable so that two feed probes place signals of inner antenna keep orthogonal in broad frequency range, and broad frequency range inner circle polarization performance is good, and axle ratio is less than 1.3dB.
6, the thickness of two medium substrates of appropriate design of the present invention and intermediate air layer so that the present invention has the feature of the low section of miniaturization, and volume is only 0.45 λ0×0.45λ0×0.075λ0, it is particularly suitable as the array element of phased array antenna, is applied in the field such as mobile communication and navigation.
Accompanying drawing explanation
Fig. 1 is tomograph above the side of the present invention.
Fig. 2 is the hierarchical diagram of the present invention.
Fig. 3 is the side top view of the first medium substrate of the present invention.
Fig. 4 is the side-lower view of the first medium substrate of the present invention.
Fig. 5 is the 3-D view of the 3rd medium substrate of the present invention.
Fig. 6 is the active standing-wave ratio bandwidth figure of the present invention.
Fig. 7 be the present invention frequency band in axle than figure.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
A kind of miniaturization low section broadband double-circle polarization microstrip antenna, as it is shown in figure 1, be a kind of layered structure.Miniaturization low section broadband double-circle polarization microstrip antenna 1 is disposed with from top to bottom: first medium substrate 3, metal support frame 7, second medium substrate 8 and the 3rd medium substrate 10, as shown in Figure 2；First medium substrate 3 is made up of upper copper-clad, intermediate medium and lower copper-clad；Second medium substrate 8 is made up of upper surface copper-clad and dielectric-slab；3rd medium substrate 10 is made up of upper copper-clad, middle strip line, lower copper-clad and two layer medium, is provided with medium between upper copper-clad and middle strip line, lower copper-clad and middle strip line.
As shown in Figure 3, Figure 4, two surfaces up and down of first medium substrate 3 are respectively arranged with parasitic metal paster 4 and lower parasitic metal paster 5, all adopt circular configuration, the size of parasitic metal paster 5 and being connected by four plated-through holes 6 under being slightly larger in dimension than of upper parasitic metal paster 4,4 plated-through holes 6 are about the centrosymmetry of first medium substrate 3；Upper parasitic metal paster 4 center drilling, cross crotch is opened at lower parasitic metal paster 5 center, and the size in hole is suitable with the size of cross crotch.In this example, the dielectric constant of first medium substrate is 2.2, and thickness is 1.5mm, and upper parasitic metal paster 4 radius is 26.5mm, and lower parasitic metal paster 5 radius is 25.5mm.
Second medium substrate 8 upper surface is provided with circular fed patch 9, and the center of second medium substrate 8 and circular fed patch 9 has the hole of formed objects, is used for putting into 90 ° of electric bridge chips 12.The dielectric constant of second medium substrate 8 is bigger than the dielectric constant of first medium substrate 3, and in this example, second medium substrate dielectric constant is 3.5, and thickness is 2.5mm, and the radius of circular fed patch 9 is 20.5mm.
3rd medium substrate 10 for realize two feed probes 13 place signals ± 90 ° of phase contrasts, form circularly polarized signal then through fed patch 9, upper parasitic metal paster 4 and lower parasitic metal paster 5, and circularly polarized signal radiate.As shown in Figure 5, (present invention adopts SMP joint to be provided with 4 strip line, 12,2 feed probes 13 of 11,90 ° of electric bridge chips and 2 radio frequency (RF) coaxial connectors 2 on 3rd medium substrate 10, and a SMP interface is left-hand circular polarization mouth, another is right-handed circular polarization mouth).Two strip line shapes between 2 feed probes 13 and 90 ° of electric bridge chips 12 are identical, and the strip line length between 2 radio frequency (RF) coaxial connectors 2 and 90 ° of electric bridge chips 12 can be different.The surrounding of 90 ° of electric bridge chips 12, radio frequency (RF) coaxial connector 2, strip line 11 and feed probes 13 is all equipped with multiple plated-through hole 6, makes upper and lower two metal surface current potentials equal, is substantially improved the standing wave performance of microstrip antenna.
90 ° of electric bridge chips 12 put into the centre bore of second medium substrate 8, the input of 90 ° of electric bridge chips 12 is connected with 2 radio frequency (RF) coaxial connectors 2 respectively through 2 strip lines 11 with isolation end, and its straight-through end is connected with 2 feed probes 13 respectively through 2 strip lines 11 with coupled end.In this example, the thickness of the 3rd medium substrate 10 is 1.0mm.
7 four jiaos of metal support frame is equipped with through hole, and between first medium substrate 3 and second medium substrate 8, as both connection and support member, this laminated construction can reduce the effective dielectric constant of microstrip antenna, thus the broadening beamwidth of antenna.Metal support frame 7 thickness is 5.5mm.
First medium substrate 3, metal support frame 7, second medium substrate 8 and the 3rd medium substrate 10 4 part are connected by four screws.
It addition, Dense metal through hole 6 is all beaten on first medium substrate 3 and second medium substrate 8 four limit, when the present invention is as phased array antenna array element, this measure can play buffer action between array element, thus reducing array element mutual coupling.
As shown in Figure 6, Figure 7, active standing-wave ratio (ActiveVSWR) bandwidth range of this example is 1.948GHz～2.365GHz, and relative bandwidth is 19.4%, axle ratio < 1.3dB in bandwidth.This example antenna volume is 0.45 λ0×0.45λ0×0.075λ0, λ0Centered by frequency electromagnetic at the wavelength of free-space propagation.
The operation principle of the present invention is:
When receiving signal: circularly polarized signal is after double-deck parasitic metal paster and fed patch receive, signal is input to 90 ° of electric bridge chips by two feed probes, synthesizes 1 road signal then through 90 ° of electric bridge chips and exports back end signal process equipment from 1 radio frequency (RF) coaxial connector that microstrip antenna is corresponding；
When launching signal: input signal by radio frequency (RF) coaxial connector to microstrip antenna, signal is divided into through 90 ° of electric bridge chips that two-way amplitude is equal, the signal of quadrature in phase, respectively through two feed probes to fed patch constrained feed, to two-layer parasitic metal paster couple feed, launch thus forming circularly polarized signal from antenna surface.
Claims (9)
1. a miniaturization low section broadband double-circle polarization microstrip antenna, it is characterised in that: include the first medium substrate (3), metal support frame (7), second medium substrate (8) and the 3rd medium substrate (10) that are fixedly connected sequentially from top to bottom；The upper surface corrosion of first medium substrate (3) is formed with the upper parasitic metal paster (4) that center is porose, the corrosion of its lower surface is formed with lower parasitic metal paster (5), the size of parasitic metal paster (5) and being connected by 4 plated-through holes (6) under being sized larger than of upper parasitic metal paster (4)；4 plated-through holes (6) are about the centrosymmetry of first medium substrate (3)；The upper surface corrosion of second medium substrate (8) is formed with fed patch (9)；3rd medium substrate (10) is provided with 4 strip lines (11), 90 ° of electric bridges (12), 2 feed probes (13) and 2 radio frequency (RF) coaxial connectors (2), the input of 90 ° of electric bridges (12) is connected with 2 radio frequency (RF) coaxial connector (2) one_to_one corresponding respectively through 2 strip lines (11) with isolation end, and its straight-through end is connected with 2 feed probes (13) one_to_one corresponding respectively through 2 strip lines (11) with coupled end；Fed patch (9) is connected by 2 plated-through holes and 2 feed probes (13) one_to_one corresponding.
2. a kind of miniaturization low section broadband double-circle polarization microstrip antenna according to claim 1, it is characterised in that: described upper parasitic metal paster (4), lower parasitic metal paster (5) and fed patch (9) are circle or square.
3. a kind of miniaturization low section broadband double-circle polarization microstrip antenna according to claim 1 and 2, it is characterised in that: the center of the lower parasitic metal paster (5) of first medium substrate (3) has cross crotch.
4. a kind of miniaturization low section broadband double-circle polarization microstrip antenna according to claim 1, it is characterised in that: 90 ° of described electric bridges (12) are 90 ° of electric bridge chips or 90 ° of electric bridge strip line networks.
5. a kind of miniaturization low section broadband double-circle polarization microstrip antenna according to claim 4, it is characterized in that: when 90 ° of electric bridges (12) are 90 ° of electric bridge chips, the center perforate of second medium substrate (8), this hole is used for holding 90 ° of electric bridge chips；The surrounding of 90 ° of electric bridge chips offers multiple plated-through hole.
6. a kind of miniaturization low section broadband double-circle polarization microstrip antenna according to claim 1, it is characterised in that: all offer multiple plated-through hole around described feed probes and radio frequency (RF) coaxial connector.
7. a kind of miniaturization low section broadband double-circle polarization microstrip antenna according to claim 1, it is characterised in that: the volume of described miniaturization low section broadband double-circle polarization microstrip antenna is 0.45 λ0×0.45λ0×0.075λ0, wherein, λ0Centered by frequency electromagnetic at the wavelength of free-space propagation.
8. a kind of miniaturization low section broadband double-circle polarization microstrip antenna according to claim 1, it is characterised in that: the dielectric constant of described second medium substrate (8) is bigger than the dielectric constant of first medium substrate (3).
9. a kind of miniaturization low section broadband double-circle polarization microstrip antenna according to claim 1, it is characterised in that: the center of two described feed probes (13) is with the line at fed patch (9) center at an angle of 90.
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Cited By (22)
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| CN106067590A (en) * | 2016-07-29 | 2016-11-02 | 南京信息职业技术学院 | A kind of double frequency omnibearing substrate integration wave-guide spiral slit antenna |
| CN106374228A (en) * | 2016-11-21 | 2017-02-01 | 广东工业大学 | Single-patch double-frequency broadband patch antenna |
| CN106384885A (en) * | 2016-11-28 | 2017-02-08 | 中国电子科技集团公司第二十九研究所 | Four-leaf-clover-shaped broadband circular-polarized planar antenna |
| CN107394381A (en) * | 2017-07-18 | 2017-11-24 | 东南大学 | A kind of broadband circle polarized array antenna of low section using stacking travelling-wave aerial unit |
| 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 |
| CN109904584A (en) * | 2019-01-29 | 2019-06-18 | 中国电子科技集团公司第三十八研究所 | A kind of dual polarized microstrip patch antenna unit and antenna array |
| CN110323543A (en) * | 2019-07-30 | 2019-10-11 | 人天通信设备股份有限公司 | Convenient for radiating element, microstrip antenna, antenna array and the street lamp antenna of stealth camouflage |
| CN110380202A (en) * | 2019-07-05 | 2019-10-25 | 上海安费诺永亿通讯电子有限公司 | A kind of low cost low section broadband Massive mimo antenna unit |
| CN110943294A (en) * | 2019-12-16 | 2020-03-31 | 电子科技大学 | Broadband low-profile dual-circular-polarization panel antenna |
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| CN112271451A (en) * | 2020-11-02 | 2021-01-26 | 河南普大信息技术有限公司 | Left-handed and right-handed integrated design microstrip antenna |
| CN112332106A (en) * | 2020-09-15 | 2021-02-05 | 上海大学 | Lens unit with polarization and phase adjustable by 360 degrees |
| CN113097704A (en) * | 2021-03-16 | 2021-07-09 | 华南理工大学 | Low-profile dual-frequency common-caliber monopole antenna based on cross-layer folding structure |
| CN113381177A (en) * | 2021-06-11 | 2021-09-10 | 重庆航天火箭电子技术有限公司 | S-band dual-circular-polarization high-integration-level broadband phased array sub-array antenna |
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| CN113922076A (en) * | 2021-10-15 | 2022-01-11 | 中国人民解放军国防科技大学 | Disc coupling feed miniaturized circularly polarized antenna for collecting microwave energy |
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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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