CN102185182B - Circularly polarized multimode wideband antenna and microstrip power division phase shift network - Google Patents
Circularly polarized multimode wideband antenna and microstrip power division phase shift network Download PDFInfo
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- CN102185182B CN102185182B CN201110088512.4A CN201110088512A CN102185182B CN 102185182 B CN102185182 B CN 102185182B CN 201110088512 A CN201110088512 A CN 201110088512A CN 102185182 B CN102185182 B CN 102185182B
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Abstract
The invention discloses a circularly polarized multimode wideband antenna and microstrip power division phase shift network, which comprises an antenna and feed network, wherein the feed network consists of a primary feed circuit and a secondary feed circuit; the primary feed circuit consists of a power divider and a 180-degree wideband phase shifter which are concatenated, and is externally connected with a master port of a signal source; the secondary feed circuit comprises two feed circuit units; and each feed circuit consists of the power divider and a 90-degree wideband phase shifter which are concatenated. The circularly polarized multimode wideband antenna and microstrip power division phase shift network has high performance, and can be applied to four conventional satellite navigation positioning service systems; the antenna adopts radiation patch grooving to improve an impedance bandwidth, greatly reduces an antenna thickness, and has high radiation characteristics and electrical characteristics; and quadruple power division phase shift network feed is adopted so as to greatly increase a circular polarization bandwidth and circular polarization purity.
Description
Technical field
The present invention relates to a kind of circular polarization multimode wideband antenna and micro-band merit is divided phase-shift network.
Background technology
GPS (Global Position System) is to utilize satellite to provide high-quality location, navigation and time service service to global user, and not only in economic field, (civilian) has major application for it, and (military) also has irreplaceable effect aspect national defence.At present, the GPS of the U.S., Muscovite GLONASS is widely used, and the Galileo in Europe and Chinese Compass have also all served society.Following NAVSTAR covers blank problem in order to improve positioning precision and to solve triangular web, will be to adopt the multiple satellite navigation system pattern of compatibility mutually, this will propose new requirement to terminal antenna, the terminal antenna of therefore studying a kind of compatible multi-mode satellite positioning navigation system is of great immediate significance.
Microstrip antenna is due to plurality of advantages such as its volume are little, lightweight, section is low and be easy to processing and circuit is integrated, become the optimal selection of satellite positioning navigation antenna, but its intrinsic frequency band is narrow, the bandwidth of general typical microstrip antenna, in 0.7% to 7% left and right, has limited the design of multi-mode satellite positioning antenna.Traditional gps antenna or be only applicable to GPS navigation system, or for compatible four kinds of NAVSTAR, adopted the structure of low-k foamed material and stacked patch, and by the be coupled structure of feed of L-type tape, cause antenna volume larger.
Summary of the invention
The present invention is directed to single band and the bulky defect of existing traditional gps antenna described above, a kind of rectangle fluting paster microstrip antenna that is applicable to four kinds of satellite navigation patterns is proposed, adopt the separately design of antenna and feeding network, use cable connects, and eliminates the impact of feeding network on antenna pattern in traditional design; Antenna part adopts rectangular microband paste structure, in radiation patch surrounding symmetric position, opens rectangular aperture, improves the impedance bandwidth of microstrip antenna; Feed partly adopts the even feed of four merit distribution phase-shift networks, improves circular polarization bandwidth and circular polarization purity.
Technical scheme of the present invention is as follows:
A kind of circular polarization multimode wideband antenna and micro-band merit are divided phase-shift network, it is characterized in that: include antenna and feeding network, described antenna comprises medium substrate, the surface attachment of described medium substrate has rectangular radiation patch, the surrounding of rectangular radiation patch is respectively equipped with rectangle crack, and the surrounding of rectangular radiation patch has respectively many outward extending microstrip lines; Described feeding network is comprised of first and second grade of feed circuit, first order feed circuit is comprised of power splitter and 180 ° of broad-band phase shifter cascades, total port in first order feed circuit outer signal source, second level feed circuit comprises two feed circuit unit, each feed circuit unit forms by power splitter and 90 ° of broad-band phase shifter cascades, second level feed circuit has a plurality of feed port and is electrically connected to respectively with many microstrip lines of rectangular radiation patch surrounding, and the phase place of described a plurality of feed port differs 90 ° successively.
Described circular polarization multimode wideband antenna and micro-band merit are divided phase-shift network, it is characterized in that: the dielectric constant of described medium substrate is 2 ~ 4.
Described circular polarization multimode wideband antenna and micro-band merit are divided phase-shift network, it is characterized in that: the frequency coverage of described antenna is: 1150 ~ 1320MHz and 1550 ~ 1620MHz.
Described circular polarization multimode wideband antenna and micro-band merit are divided phase-shift network, it is characterized in that: described aerial radiation polarization of ele is right-handed circular polarization, and axial ratio AR<3dB.
Described circular polarization multimode wideband antenna and micro-band merit are divided phase-shift network, it is characterized in that: the gain G ain>6dB of described antenna.
Described circular polarization multimode wideband antenna and micro-band merit are divided phase-shift network, it is characterized in that: described power splitter is Wilkinson power splitter.
Analyzing Antenna Design will seek knowledge, and impedance bandwidth wider (BW=470MHz), is wide band circular polarization requirement on the other hand on the one hand.Because this antenna impedance relative bandwidth reaches 34%, therefore use the conventional microstrip antenna at all cannot complete design requirement.The method of conventional broadening microstrip antenna bandwidth has use stacked patch; Increase the thickness of medium substrate, reduce the dielectric constant of medium; Paster surface fluting loading technique etc.Obviously, the drawback that first two method all can bring antenna volume to increase, use paster surface fluting technology can not bring this impact, and flexible design is changeable, has increased the degree of freedom of design.
For the good circular polarization performance that will realize wide-band like this, choice for use of the present invention is presented the scheme that a feed is realized circular polarization more, adopts broadband four merits to divide phase-shift network feed.Utilize four signals that differ successively 90 ° on locus in symmetrical and phase place to encourage mutually orthogonal electric field component to realize circular polarization, this design not only can effectively improve Circular polarization ratio bandwidth and purity, and owing to being the circumferential symmetry that symmetrical structure can improve phase pattern, guaranteed the stable of phase center.
Beneficial effect of the present invention:
Function admirable of the present invention, can be applied to four kinds of current satellite positioning navigation service systems, and antenna adopts radiation patch to slot to improve impedance bandwidth, has greatly reduced antenna thickness, has good radiation characteristic and electrical characteristics; The present invention adopts four merits to divide phase-shift network feed, has greatly improved circular polarization bandwidth and circular polarization purity.
Accompanying drawing explanation
Fig. 1 is antenna structure view of the present invention.
Fig. 2 is feeding network structural representation of the present invention.
Fig. 3 is the stickogram of multimodal satellite navigation antenna of the present invention, i.e. S (1,1) figure.
Fig. 4 is antenna gain of the present invention and axial ratio figure.
Fig. 5 is the directional diagram of multimodal satellite navigation antenna of the present invention, wherein (a) be antenna at the antenna pattern at 1207MHz frequency place, be (b) that antenna is at the antenna pattern at 1575MHz frequency place.
Embodiment
Referring to Fig. 1,2, a kind of circular polarization multimode wideband antenna and micro-band merit are divided phase-shift network, include antenna and feeding network, antenna comprises medium substrate 1, the surface attachment of medium substrate 1 has rectangular radiation patch 2, the surrounding of rectangular radiation patch 2 is respectively equipped with rectangle crack 3, and the surrounding of rectangular radiation patch 2 has respectively four outward extending microstrip lines 4, feeding network is by first, two stage feeding the electric circuit constitute, first order feed circuit is comprised of power splitter and 180 ° of broad-band phase shifter cascades, total port in first order feed circuit outer signal source, second level feed circuit comprises two feed circuit unit, each feed circuit unit forms by power splitter and 90 ° of broad-band phase shifter cascades, second level feed circuit has four feed port 5, 6, 7, 8 and be electrically connected to respectively with four microstrip lines 4 of rectangular radiation patch surrounding, four feed port 5, 6, 7, 8 phase place differs 90 ° successively, i.e. four feed port 5, 6, 7, 8 phase place is followed successively by: 0 °, 90 °, 180 °, 270 °.
The dielectric constant of medium substrate 1 is 2 ~ 4.
The frequency coverage of antenna is: 1150 ~ 1320MHz and 1550 ~ 1620MHz.
Aerial radiation polarization of ele is right-handed circular polarization, and axial ratio AR<3dB.
The gain G ain>6dB of antenna.
Power splitter is Wilkinson power splitter.
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Referring to Fig. 3, as seen from the figure, the impedance bandwidth of this antenna S11<-10db is 1.07GHz ~ 1.79GHz, has reached 48.6% relative bandwidth.
Referring to Fig. 4, as seen from the figure, antenna gain is greater than 6dB in working frequency range, and zenith axis is all less than 3dB than in working frequency range, and this antenna gain is higher as seen, and circular polarization purity is better.
Fig. 5 has provided antenna in 1207MHz(Compass system) and 1575MHz(GPS system) directional diagram, by figure, know that the cross polarization of antenna on two frequencies is all better than 25dB, antenna main lobe directional diagram is symmetrical, half-power beam width is greater than 70 °, and raise with frequency, the narrowing of directional pattern, this is the relative cause increasing of electric size due to ground.The above results shows that this invention is applicable to multi-mode satellite positioning navigation system very much.
Claims (5)
1. a circular polarization multimode wideband antenna and micro-band merit are divided phase-shift network, it is characterized in that: include antenna and feeding network, described antenna comprises medium substrate, the surface attachment of described medium substrate has rectangular radiation patch, the surrounding of rectangular radiation patch is respectively equipped with rectangle crack, and the surrounding of rectangular radiation patch has respectively 4 outward extending microstrip lines, described feeding network is by first, two stage feeding the electric circuit constitute, first order feed circuit is comprised of power splitter and 180 ° of broad-band phase shifter cascades of an one-to-two, total port in first order feed circuit outer signal source, second level feed circuit comprises two feed circuit unit, each feed circuit unit forms by power splitter and 90 ° of broad-band phase shifter cascade of an one-to-two, second level feed circuit has 4 feed port and is electrically connected to respectively with 4 microstrip lines of rectangular radiation patch surrounding, the phase place of described 4 feed port differs 90 ° successively, one of them of the power splitter of first order feeding network is along separate routes by being electrically connected to one of them power splitter of second level feed circuit respectively after 180 ° of broad-band phase shifter phase shifts, and another is directly electrically connected to another power splitter of second level feed circuit along separate routes, described power splitter is Wilkinson power splitter.
2. circular polarization multimode wideband antenna according to claim 1 and micro-band merit are divided phase-shift network, it is characterized in that: the dielectric constant of described medium substrate is 2 ~ 4.
3. circular polarization multimode wideband antenna according to claim 1 and micro-band merit are divided phase-shift network, it is characterized in that: the frequency coverage of described antenna is: 1150 ~ 1320MHz and 1550 ~ 1620MHz.
4. circular polarization multimode wideband antenna according to claim 1 and micro-band merit are divided phase-shift network, it is characterized in that: described aerial radiation polarization of ele is right-handed circular polarization, and axial ratio AR<3dB.
5. circular polarization multimode wideband antenna according to claim 1 and micro-band merit are divided phase-shift network, it is characterized in that: the gain G ain>6dB of described antenna.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110088512.4A CN102185182B (en) | 2011-04-09 | 2011-04-09 | Circularly polarized multimode wideband antenna and microstrip power division phase shift network |
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| CN201110088512.4A CN102185182B (en) | 2011-04-09 | 2011-04-09 | Circularly polarized multimode wideband antenna and microstrip power division phase shift network |
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| CN102185182B true CN102185182B (en) | 2014-02-12 |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102420351B (en) * | 2012-01-04 | 2014-06-11 | 镇江中安通信科技有限公司 | Power dividing phase shifter |
| CN102637963B (en) * | 2012-03-28 | 2015-03-18 | 中国联合网络通信集团有限公司 | Indoor distributed antenna system and multiple input multiple output method |
| CN102683900B (en) * | 2012-05-22 | 2014-10-22 | 中国联合网络通信集团有限公司 | Multi-input multi-output antenna system and multi-input multi-output method |
| CN105428791A (en) * | 2014-09-16 | 2016-03-23 | 镇江红宝利电子有限公司 | Dual-polarized patch probe antenna with frequency band from 800MHZ to 960MHZ |
| CN105703081A (en) * | 2016-01-13 | 2016-06-22 | 深圳华天信通科技有限公司 | Array antenna apparatus |
| CN106229686B (en) * | 2016-08-31 | 2023-03-17 | 上海捷士太通讯技术有限公司 | Broadband circularly polarized microstrip antenna |
| CN106450762B (en) * | 2016-10-19 | 2023-10-10 | 厦门致联科技有限公司 | Compact symmetrical feed network |
| CN108808220B (en) * | 2018-06-07 | 2020-06-05 | 南京理工大学 | Broadband microstrip array antenna adopting waveguide feed |
| CN108761502B (en) * | 2018-08-31 | 2024-02-02 | 广东圣大电子有限公司 | Multimode GNSS test receiver with accurate phase center |
| CN109638422B (en) * | 2018-11-15 | 2021-02-05 | 中国电子科技集团公司第三十八研究所 | Broadband circularly polarized common-caliber communication navigation array antenna |
| CN109687133B (en) * | 2019-01-08 | 2024-02-20 | 国网福建省电力有限公司南平供电公司 | Miniaturized big dipper satellite terminal antenna |
| CN109755721B (en) * | 2019-01-22 | 2021-03-05 | 中信科移动通信技术有限公司 | Microstrip radiating element and array antenna |
| CN111682304B (en) * | 2020-05-25 | 2022-09-27 | 四川九洲电器集团有限责任公司 | Sequence feed circularly polarized antenna with broadband phase-shifting network |
| CN112688051A (en) * | 2020-12-16 | 2021-04-20 | 深圳市鸿陆技术有限公司 | RFID antenna and RFID reader |
| CN114050413A (en) * | 2021-12-27 | 2022-02-15 | 陕西海积信息科技有限公司 | Broadband feed network, antenna and communication equipment |
| CN114421184B (en) * | 2022-01-19 | 2023-02-28 | 湖南大学 | High-performance circularly polarized Beidou array antenna loaded with broadband feed network |
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| CN101286592A (en) * | 2008-06-13 | 2008-10-15 | 航天恒星科技股份有限公司 | Multimodal satellite navigation terminal antennae with wide-band circular polarized wide wave beam |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101286592A (en) * | 2008-06-13 | 2008-10-15 | 航天恒星科技股份有限公司 | Multimodal satellite navigation terminal antennae with wide-band circular polarized wide wave beam |
Non-Patent Citations (3)
| Title |
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| 宋朝晖，张乘风，刘美佳，丁志勇.缝隙加载圆极化微带天线特性研究.《2007年全国微波毫米波会议论文集》.2008,445-448. * |
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| 说明书附图1-5. |
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