CN104393424A - Satellite navigation precision approach quadrifilar helix wide-band array antenna - Google Patents
Satellite navigation precision approach quadrifilar helix wide-band array antenna Download PDFInfo
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Abstract
The invention discloses a satellite navigation precision approach quadrifilar helix wide-band array antenna which comprises seven quadrifilar helix laminated antenna array elements with the same structures, wherein six quadrifilar helix laminated antenna array elements are uniformly distributed on the circumference, and one quadrifilar helix laminated antenna array element is arranged at the center. Each quadrifilar helix laminated antenna array element comprises a quadrifilar helix laminated antenna, a feed network and a low-noise amplifying circuit in cascade connection, wherein the quadrifilar helix laminated antenna comprises an upper quadrifilar helix antenna and a lower quadrifilar helix antenna which are laminated and respectively receive satellite signals on different frequency bands. The signals on L1 and L2C frequency bands of a GPS (global positioning system), B1 and B2 frequency bands of a big dipper and E1 and E5 frequency bands of a GALILEO are received, the array antenna is uniform in gain and has a high phase center, and multisystem, multi-frequency-point and intact processing needed by precision approach of an aircraft can be realized.
Description
Technical field
The present invention relates to a kind of four arm spiral Wide band array antennas, especially a kind of satellite navigation precision approach four arm spiral Wide band array antenna, belong to satellite navigation aviation and strengthen technical field.
Background technology
The essence of satellite navigation system is radio distance-measuring.Receiver antenna is the key component realizing radio signal reception, and the indexs such as its directional diagram, bandwidth of operation and phase stability directly determine receiver overall performance.
Multiple single antenna is rearranged antenna system by array antenna according to certain rules, by adjusting feeding classification and the arrangement regulation of each antenna element, realizing specific directional diagram, polarization characteristic and bandwidth characteristic needs, having important application prospect and meaning.
Satellite navigation becomes a kind of important technology approach of aviation aircraft location, can be applicable to Route reform and precision approach.For meeting precision and the integrity requirement in aircraft accurate stage, need to introduce enhancing system, it is made up of multiple stage reference receiver and integrity process information facility.For ease of integrity monitoring, the antenna gain of reference receiver wishes to have uniform properties.In addition, satellite navigation signals is weak, is subject to external interference, and reference receiver wishes that having signal strength signal intensity improves and AF panel function.
Array antenna can improve anti-multipath, the interference free performance of reference receiver, improves navigation and positioning accuracy, makes satellite navigation be applicable to aircraft landing, the use occasion of the high-precision requirement such as warship.But current reference receiver antenna adopts high-precision antenna usually, do not possess flatness, signal strength signal intensity is improved and interference rejection capability.
Lopez, A.R etc. are at GPS landing system reference antenna, IEEE, Volume:52, ISSE:1,2010,21 array elements are used to form 1 road signal in Page:104-113, the antenna pattern gain formed is even, but only receives L1, L2 and L5 frequency of GPS, does not consider that radio frequency interference suppresses, and its antenna is in " bar " shape, add Module of aerial, overall dimensions has certain altitude, needs the limit for height requirement considering airport during installation.NAVSYS company have developed the array antenna being applied to GPS, for improving signal gain, strengthening antijamming capability, but does not consider antenna gain uniformity.
Current technical scheme, mainly for gps system, does not comprise other satellite navigation system; " antenna gain uniformity " and " signal strength signal intensity is improved and possessed AF panel " two aspect designs do not possess simultaneously.
The present invention is according to four-arm spiral antenna feature, devise the satellite navigation four arm helical array antenna of multisystem multifrequency point, by the antenna pattern selecting suitable physical size to form uniform gain, to meet precision approach reference receiver high-performance treatments demand.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of satellite navigation precision approach four arm spiral Wide band array antenna.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of satellite navigation precision approach four arm spiral Wide band array antenna, the four arm spiral laminated bays identical by 7 structures form, wherein 6 four arm spiral laminated sky array element lines are evenly distributed on circumferentially, and 1 four arm spiral laminated bay is arranged on center; Described four arm spiral laminated bays are made up of four arm spiral laminated antennas of cascade, feeding network and low noise amplifier circuit; Described four arm spiral laminated antennas comprise upper strata four-arm spiral antenna and lower floor's four-arm spiral antenna of stacked placement; Described upper strata four-arm spiral antenna and lower floor's four-arm spiral antenna receive the satellite-signal of different frequency range respectively.
Described upper strata four-arm spiral antenna and lower floor four-arm spiral antenna, by the consistent spiral conducting line of four length, equidistantly enclose axis coiling and form.Described upper strata four-arm spiral antenna receives the satellite-signal of 1.5G frequency range, and described lower floor four-arm spiral antenna receives the satellite-signal of 1.2G frequency range.
The lead angle of described upper strata four-arm spiral antenna is 45 °, and antenna diameter is 25mm; Its lead angle of described lower floor four-arm spiral antenna is 65 °, and the width of spiral arm is 2mm, and antenna diameter is 35mm.
Described feeding network is electric bridge feeding network.
Described electric bridge feeding network comprises electric bridge chip N1-N6; 3 pin of described electric bridge chip N1, N3 and 4 pin connect the feed port of each spiral conducting line of layer four-arm spiral antenna respectively; 3 pin of described electric bridge chip N5, N7 and 4 pin connect the feed port of each spiral conducting line of lower floor's four-arm spiral antenna respectively; 3 pin of described electric bridge chip N2 and 4 pin connect 1 pin of described electric bridge chip N1 and N3 respectively, and its 1 pin is as the first output of described electric bridge feeding network; 3 pin of described electric bridge chip N6 and 4 pin connect 1 pin of described electric bridge chip N5 and N7 respectively, and its 1 pin is as the second output of described electric bridge feeding network.
Described low noise amplifier circuit is made up of low noise amplifier A1-A3, band pass filter Z1-Z2, mixer N4, resistance R1-R6, electric capacity C1-C4, inductance L 1; The input of described low noise amplifier A1 and A2 connects the first output and second output of described electric bridge feeding network respectively, and its output connects 1 pin of described band pass filter Z1 and Z2 respectively; Described resistance R1-R3 is end to end, and the node between resistance R1 and R2 connects 2 pin of described band pass filter Z1, and the node between resistance R1 and R3 connects 3 pin of mixer N4, the node ground connection between resistance R2 and R3; Described resistance R4-R6 is end to end, and the node between resistance R4 and R5 connects 2 pin of described band pass filter Z2, and the node between resistance R4 and R6 connects 4 pin of mixer N4, the node ground connection between resistance R5 and R6; The 1 foot meridian capacitor C3 of described low noise amplifier A3 connects 6 pin of mixer N4, and its 6 pin connects+3.3V power supply through inductance L 1, and its 4 pin meets electric capacity C4; The other end of electric capacity C4 is as the output of described low noise amplifier circuit.
The beneficial effect adopting technique scheme to produce is:
1, the present invention adopts the Wide-Band Design, achieves the array received of L1 and the L2C frequency range of GPS, B1 and the B2 frequency range of the Big Dipper, E1 and the E5 frequency band signals of GALILEO, has broadband feature, meets the multimode multi-frequency point demand of reference receiver; Signal syntheses 1 tunnel, every road exports, and is convenient to connect use.
2, antenna gain of the present invention has uniform properties, can carry out satellite navigation signals enhancing and AF panel, is conducive to realizing the multisystem needed for aircraft precision approach, multifrequency point, integrity process.Mutual coupling of antenna is little, has high stability phase center.
3, inventive antenna has desirable hemispherical radiation properties, is convenient to ARRAY PROCESSING and forms higher gain at low elevation angle place.Meet satellite navigation aviation and strengthen application demand.
4, two frequency band signals of the present invention amplify filtering more respectively, ensure that and are not subject to being with outer interference signal to affect, and have good channels selectivity.
5, the present invention is conducive to reducing equipment volume and power consumption, is convenient to high-acruracy survey.
Accompanying drawing illustrates:
Fig. 1 is vertical view of the present invention;
Fig. 2 is the theory diagram of the present invention four arm spiral laminated bay;
Fig. 3 is the structure chart of the present invention four arm spiral laminated bay;
Fig. 4 is the circuit theory diagrams of feed networking of the present invention and low noise amplifier.
1: upper strata four-arm spiral antenna, 2: copper bar, 3: lower floor's four-arm spiral antenna, 4: base
Embodiment
As shown in Figure 1, a kind of satellite navigation precision approach four arm spiral Wide band array antenna, the four arm spiral laminated bays identical by 7 structures form, and wherein 6 four arm spiral laminated sky array element lines are evenly distributed on circumferentially, and 1 four arm spiral laminated bay is arranged on center.As shown in Figure 2, described four arm spiral laminated bays are made up of four arm spiral laminated antennas of cascade, feeding network and low noise amplifier circuit.Described four arm spiral laminated antennas comprise upper strata four-arm spiral antenna and lower floor's four-arm spiral antenna of stacked placement; Described upper strata four-arm spiral antenna and lower floor's four-arm spiral antenna receive the satellite-signal of different frequency range respectively.
As shown in Figure 3, described upper strata four-arm spiral antenna and lower floor four-arm spiral antenna, by the consistent spiral conducting line of four length, equidistantly enclose axis coiling and form.Described upper strata four-arm spiral antenna and lower floor four-arm spiral antenna, by the consistent spiral conducting line of four length, equidistantly enclose axis coiling and form.Described upper strata four-arm spiral antenna receives the satellite-signal of 1.5G frequency range, and described lower floor four-arm spiral antenna receives the satellite-signal of 1.2G frequency range.
In order to ensure broad beam, the gain uniform properties of precision approach system reference antenna, the antenna with side radiation direction characteristic of antenna is made key design.Wavelength corresponding to helical antenna resonance frequency is determined by antenna diameter and lead angle:
λ＝πd(1+cosα)/sinα
According to this design formula, be optimized design to antenna, optimization Simulation result is:
Upper strata four-arm spiral antenna receives the satellite-signal of 1.5G frequency range, and its lead angle is 45 °, and diameter is 25mm; Lower floor's four-arm spiral antenna receives the satellite-signal of 1.2G frequency range, and its lead angle is 65 °, and the width of spiral arm is 2mm, and diameter is 35mm.
Described feeding network is electric bridge feeding network.
As shown in Figure 4, described electric bridge feeding network comprises electric bridge chip N1-N6; 3 pin of described electric bridge chip N1, N3 and 4 pin connect the feed port of each spiral conducting line of layer four-arm spiral antenna respectively; 3 pin of described electric bridge chip N5, N7 and 4 pin connect the feed port of each spiral conducting line of lower floor's four-arm spiral antenna respectively; 3 pin of described electric bridge chip N2 and 4 pin connect 1 pin of described electric bridge chip N1 and N3 respectively, and its 1 pin is as the first output of described electric bridge feeding network; 3 pin of described electric bridge chip N6 and 4 pin connect 1 pin of described electric bridge chip N5 and N7 respectively, and its 1 pin is as the second output of described electric bridge feeding network.
As shown in Figure 4, described low noise amplifier circuit is made up of low noise amplifier A1-A3, band pass filter Z1-Z2, mixer N4, resistance R1-R6, electric capacity C1-C4, inductance L 1; The input of described low noise amplifier A1 and A2 connects the first output and second output of described electric bridge feeding network respectively, and its output connects 1 pin of described band pass filter Z1 and Z2 respectively; Described resistance R1-R3 is end to end, and the node between resistance R1 and R2 connects 2 pin of described band pass filter Z1, and the node between resistance R1 and R3 connects 3 pin of mixer N4, the node ground connection between resistance R2 and R3; Described resistance R4-R6 is end to end, and the node between resistance R4 and R5 connects 2 pin of described band pass filter Z2, and the node between resistance R4 and R6 connects 4 pin of mixer N4, the node ground connection between resistance R5 and R6; The 1 foot meridian capacitor C3 of described low noise amplifier A3 connects 6 pin of mixer N4, and its 6 pin connects+3.3V power supply through inductance L 1, and its 4 pin meets electric capacity C4; The other end of electric capacity C4 is as the output of described low noise amplifier circuit.
According to the frequency point setting of L1 and the L2C frequency range of GPS, B1 and the B2 frequency range of the Big Dipper, E1 and the E5 frequency band signals of GALILEO, the two frequency bins of each system, belong to two frequency ranges respectively: L1, B1, E1 signal belongs to 1.5GHz frequency range, L2C, B2, E5 signal belongs to 1.2GHz frequency range.
Four arm spiral laminated antennas adopt and two four-arm spiral antennas are carried out lamination placement form, and upper strata helical antenna is operated in 1.5GHz frequency range, and lower floor's helical antenna is operated in 1.2GHz frequency range.Four spiral arm current amplitudes of upper strata helical antenna are equal, and adopt electric bridge feed, the phase difference between 4 ports is followed successively by 0 °, 90 °, 180 °, 270 ° modes and carries out feed.Four spiral arm current amplitudes of lower floor's helical antenna are equal, and adopt electric bridge feed, the phase difference between 4 ports is followed successively by 0 °, 90 °, 180 °, 270 ° modes and carries out feed.
Upper strata helical antenna adopts flexible PCB structure, is bent, and is formed in one with antenna radiating element printing.Plane P CB structural design is adopted bottom lower floor's helical antenna.
The feeder cable of upper strata helical antenna is from being highly 69mm, and diameter is that the copper pipe inside of 10mm is passed, upper strata helical antenna and lower floor helical antenna distance 51mm.
Feed networking adopts the XC1400P-03S of Anaren company, and its imbalance of amplitude and phase degree is 0.3dB/4 °, has good width and to balance each other characteristic, and ensure that axial ratio and the Phase center stability of antenna excellence.
Low noise amplifier prime adopts the ultra-low noise device WHM14-3020LE of WANTCOM company, and the satellite navigation signals of 1.5GHz frequency range and 1.2GHz frequency range leaches by band pass filter CMF44C1575C32B and NBF4565C1166C98A respectively.
Resistance R1, R2, R3 and R4, R5, R6 form two inter-stage matching networks, ensure that the port of band pass filter has less voltage standing wave ratio, thus the amplitude-frequency characteristic making band pass filter good is not by the impact of rear end.
Two frequency band signals are closed road by the SBTC-2-25 of application MINI-CIRCUITS, and carry out low noise amplification afterwards, the noise factor that whole amplitude limit field is put is less than 0.8dB, and gain is 40dB.
The design that two frequency band signals amplify filtering more respectively ensure that and is not subject to being with outer interference signal to affect, and has good channels selectivity.
Claims (6)
1. a satellite navigation precision approach four arm spiral Wide band array antenna, it is characterized in that: the four arm spiral laminated bays identical by 7 structures form, wherein 6 four arm spiral laminated sky array element lines are evenly distributed on circumferentially, and 1 four arm spiral laminated bay is arranged on center; Described four arm spiral laminated bays are made up of four arm spiral laminated antennas of cascade, feeding network and low noise amplifier circuit; Described four arm spiral laminated antennas comprise upper strata four-arm spiral antenna and lower floor's four-arm spiral antenna of stacked placement; Described upper strata four-arm spiral antenna and lower floor's four-arm spiral antenna receive the satellite-signal of different frequency range respectively.
2. a satellite navigation precision approach four arm spiral Wide band array antenna according to claim 1, it is characterized in that: described upper strata four-arm spiral antenna and lower floor four-arm spiral antenna, by the consistent spiral conducting line of four length, equidistantly enclose axis coiling and form; Described upper strata four-arm spiral antenna receives the satellite-signal of 1.5G frequency range.
3. a satellite navigation precision approach four arm spiral Wide band array antenna according to claim 2, it is characterized in that: its lead angle is 45 °, diameter is 25mm; Described lower floor four-arm spiral antenna receives the satellite-signal of 1.2G frequency range, and its lead angle is 65 °, and the width of spiral arm is 2mm, and diameter is 35mm.
4. basis is by a satellite navigation precision approach four arm spiral Wide band array antenna according to claim 1, it is characterized in that: described feeding network is electric bridge feeding network.
5. a satellite navigation precision approach four arm spiral Wide band array antenna according to claim 4, is characterized in that: described electric bridge feeding network comprises electric bridge chip N1-N6; 3 pin of described electric bridge chip N1, N3 and 4 pin connect the feed port of each spiral conducting line of layer four-arm spiral antenna respectively; 3 pin of described electric bridge chip N5, N7 and 4 pin connect the feed port of each spiral conducting line of lower floor's four-arm spiral antenna respectively; 3 pin of described electric bridge chip N2 and 4 pin connect 1 pin of described electric bridge chip N1 and N3 respectively, and its 1 pin is as the first output of described electric bridge feeding network; 3 pin of described electric bridge chip N6 and 4 pin connect 1 pin of described electric bridge chip N5 and N7 respectively, and its 1 pin is as the second output of described electric bridge feeding network.
6. the arbitrary satellite navigation precision approach four arm spiral Wide band array antenna according to claim 1-5, is characterized in that: described low noise amplifier circuit is made up of low noise amplifier A1-A3, band pass filter Z1-Z2, mixer N4, resistance R1-R6, electric capacity C1-C4, inductance L 1; The input of described low noise amplifier A1 and A2 connects the first output and second output of described electric bridge feeding network respectively, and its output connects 1 pin of described band pass filter Z1 and Z2 respectively; Described resistance R1-R3 is end to end, and the node between resistance R1 and R2 connects 2 pin of described band pass filter Z1, and the node between resistance R1 and R3 connects 3 pin of mixer N4, the node ground connection between resistance R2 and R3; Described resistance R4-R6 is end to end, and the node between resistance R4 and R5 connects 2 pin of described band pass filter Z2, and the node between resistance R4 and R6 connects 4 pin of mixer N4, the node ground connection between resistance R5 and R6; The 1 foot meridian capacitor C3 of described low noise amplifier A3 connects 6 pin of mixer N4, and its 6 pin connects+3.3V power supply through inductance L 1, and its 4 pin meets electric capacity C4; The other end of electric capacity C4 is as the output of described low noise amplifier circuit.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025516A (en) * | 2016-06-16 | 2016-10-12 | 王博 | Multi-band common-caliber composite miniature cloud tower antenna |
| CN107425273A (en) * | 2017-07-18 | 2017-12-01 | 福建福大北斗通信科技有限公司 | A kind of Big Dipper spar buoy antenna |
| CN107706508A (en) * | 2017-08-21 | 2018-02-16 | 中国电子科技集团公司第五十四研究所 | A kind of anti-multipath antenna for satellite navigation precision approach system |
| CN110519684A (en) * | 2019-08-20 | 2019-11-29 | 深圳市微能信息科技有限公司 | For measuring the aerial array and positioning system of Bluetooth carrier phase and phase difference |
| CN110988925A (en) * | 2019-12-17 | 2020-04-10 | 北京遥测技术研究所 | Pulse interference detection and parameter determination method for satellite navigation receiver |
| WO2021082016A1 (en) * | 2019-11-01 | 2021-05-06 | 华为技术有限公司 | Antenna array and communication device |
| CN115458955A (en) * | 2022-10-19 | 2022-12-09 | 无锡国芯微电子***有限公司 | Multi-band single-winding helical antenna |
| CN115642389A (en) * | 2022-09-27 | 2023-01-24 | 深圳市阿瑞仕科技有限公司 | Multi-frequency-band four-arm spiral antenna of portable communication equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020196193A1 (en) * | 2001-06-22 | 2002-12-26 | Butler Derek A. | Mechanism for differential dual-directional antenna array |
| CN204179236U (en) * | 2014-11-24 | 2015-02-25 | 中国电子科技集团公司第五十四研究所 | Satellite navigation precision approach Wide band array antenna |
-
2014
- 2014-11-24 CN CN201410679814.2A patent/CN104393424B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020196193A1 (en) * | 2001-06-22 | 2002-12-26 | Butler Derek A. | Mechanism for differential dual-directional antenna array |
| CN204179236U (en) * | 2014-11-24 | 2015-02-25 | 中国电子科技集团公司第五十四研究所 | Satellite navigation precision approach Wide band array antenna |
Non-Patent Citations (2)
| Title |
|---|
| MOHAMED A. ELMANSOURI 等: ""Ultra-Wideband Spiral-Helix Antenna Array"", 《2014 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM》 * |
| 张涛: ""一种用于星间链路的四臂螺旋天线的研究"", 《中国优秀硕士学位论文》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025516A (en) * | 2016-06-16 | 2016-10-12 | 王博 | Multi-band common-caliber composite miniature cloud tower antenna |
| CN107425273A (en) * | 2017-07-18 | 2017-12-01 | 福建福大北斗通信科技有限公司 | A kind of Big Dipper spar buoy antenna |
| CN107706508A (en) * | 2017-08-21 | 2018-02-16 | 中国电子科技集团公司第五十四研究所 | A kind of anti-multipath antenna for satellite navigation precision approach system |
| CN110519684A (en) * | 2019-08-20 | 2019-11-29 | 深圳市微能信息科技有限公司 | For measuring the aerial array and positioning system of Bluetooth carrier phase and phase difference |
| WO2021082016A1 (en) * | 2019-11-01 | 2021-05-06 | 华为技术有限公司 | Antenna array and communication device |
| CN110988925A (en) * | 2019-12-17 | 2020-04-10 | 北京遥测技术研究所 | Pulse interference detection and parameter determination method for satellite navigation receiver |
| CN115642389A (en) * | 2022-09-27 | 2023-01-24 | 深圳市阿瑞仕科技有限公司 | Multi-frequency-band four-arm spiral antenna of portable communication equipment |
| CN115458955A (en) * | 2022-10-19 | 2022-12-09 | 无锡国芯微电子***有限公司 | Multi-band single-winding helical antenna |
| CN115458955B (en) * | 2022-10-19 | 2023-10-10 | 无锡国芯微电子***有限公司 | Multi-band single-winding helical antenna |
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