CN102509845A - Multimode occulting antenna with stable phase center - Google Patents
Multimode occulting antenna with stable phase center Download PDFInfo
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- CN102509845A CN102509845A CN2011102886437A CN201110288643A CN102509845A CN 102509845 A CN102509845 A CN 102509845A CN 2011102886437 A CN2011102886437 A CN 2011102886437A CN 201110288643 A CN201110288643 A CN 201110288643A CN 102509845 A CN102509845 A CN 102509845A
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Abstract
A multimode occulting antenna with a stable phase center comprises a reflection cavity, a lower radiation paster, an upper radiation paster, four feed probe sleeves, four feed probe inner cores and two support columns. Each feed probe sleeve comprises a metal seat and filler, one end of the metal seat is a metal column, the other end of the metal seat is a cylindrical metal cavity, and the filler is used for filling the cylindrical cavity of the metal seat. The sleeve-shaped probes are coupled with feed through four points, probes are uniformly distributed on the circumference, an aerial radiation paster consists of an upper layer and a lower layer, the lower layer is coupled with the feed through the sleeve-shaped probes, the upper layer is coupled with the feed through the lower radiation paster, the middle is supported by the metal support columns, and the reflection cavity is of a round bowl-shaped structure and higher than the upper radiation paster. The occulting antenna is excellent in performance and structure, simple and reliable in process, wide in frequency band, capable of meeting use requirements of a GPS (global positioning system), BD-2, GALILEO and GLONASS, wide in beam coverage, high in gain, stable in phase center, excellent in axial ratio performance, and applicable to a precise obscuration detection system and other high-precision detection systems.
Description
Technical field
The present invention relates to the stable occultation antenna of a kind of multimode phase center, be applicable to aircraft LEO occultation and other detected with high accuracy systems such as accurate satellite, unmanned plane, dirigible, belong to the detected with high accuracy antenna technical field.
Background technology
Late 1980s; Abroad begin one's study and a kind ofly new survey the earth atmosphere environment method based on the gps satellite radio signal: the GPS radio signal receives the atmospheric refraction influence when passing through earth atmosphere; Propagation path bends, and the signal phase that causes receiver user to receive produces and postpones, and obtains information such as temperature in the atmosphere, pressure, humidity, electron density through measuring these retardations; This method is called as the Radio Occultation measuring technique; In order to improve the LEO occultation inversion accuracy, the detection system based on GLONASS (GNSS, Global Navigation Satellite System) has been proposed.As the critical component in the LEO occultation system, high accuracy occultation antenna technology has become current urgent problem.
The occultation antenna is a kind of broad beam antenna, requires antenna in wide angular domain scope, to have higher gain and stable phase center.The occultation antenna adopts beam-shaped antenna formation formula more at present, comes antenna is carried out wave beam forming through the variation to each cell input signal phase place of aerial array, reaches the purpose of broadening wave beam.The advantage of this antenna is to realize that various special shape directional diagrams cover through each array element phase change of antenna; But the beam-shaped antenna battle array need realize the signal excitation of out of phase to each array element of antenna; Cause antenna feeding network complicated, antenna array phase change in wide angular domain scope is bigger, the phase center poor stability; Need carry out accurately phase center demarcation; And because the phase-shift network bandwidth is narrower, big limitations the overall bandwidth of antenna, can not fully cover the frequency range of GPS, BD-2, GALILEO and GLONASS.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiency of prior art, provide a kind of multimode phase center stable occultation antenna, phase center is stable, structure and processing technology are simple, is applicable to aircraft such as satellite, unmanned plane, dirigible.
Technical solution of the present invention is:
The occultation antenna that a kind of multimode phase center is stable comprises under reflection cavity, the radiation paster, four feed probes sleeves, four feed probes inner cores, first support column and second support columns in paster, the radiation; Said feed probes sleeve comprises metal pedestal and filler again, and an end of metal pedestal is a metal column, and the other end is the metal cylinder cavity, and filler fills up the cylindrical cavity of metal pedestal;
Said reflection cavity is the hollow metal cylinder cavity of a bottom surface sealing; Said second support column is a metal cylinder; And said second support column is installed in the inner chamber bottom surface home position of reflection cavity; Align with the center of circle, inner chamber bottom surface of said reflection cavity in the center of circle, bottom surface of said second support column; Paster is circular foil member and is installed in the said second support column top under the said radiation, and paster is concentric with second support column under the radiation, and the height of paster is lower than the housing depth of said reflection cavity under the radiation; Said first support column is a metal cylinder and is installed under the said radiation on the paster, and is concentric with paster under the said radiation; Paster is circular foil member and is installed in the said first support column top in the said radiation, is higher than the housing depth of said reflection cavity with paster in the concentric and said radiation of first support column;
The metal column of four metal pedestal one ends is fixed on the inner chamber bottom surface of said reflection cavity and is the center of circle with the center of circle, inner chamber bottom surface of said reflection cavity, is evenly distributed on the same circumference, and paster contacts under the filler in the cylindrical cavity of metal pedestal and the radiation;
Said four feed probes inner cores vertically pass under the radiation paster and be inserted among the filler and between said feed probes inner core and the metal pedestal electricity isolate; Fixedly mount between the paster under feed probes inner core and the radiation, and the feed probes inner core is concentric with said metal pedestal.
In the said radiation diameter of paster at 68mm between the 72mm, thickness at 1mm between the 3mm.
Under the said radiation diameter of paster at 99mm between the 101mm, thickness at 1mm between the 3mm.
The height of said first support column at 14mm between the 16mm.
The height of said second support column at 15mm between the 17mm.
The equally distributed circumference of said feed probes sleeve, diameter at 44mm between the 48mm, the metal column height of an end of the metal pedestal of said feed probes sleeve at 7mm between the 9mm, the cylindrical cavity of metal pedestal part height at 5mm between the 7mm.
To between the 3mm, length 8mm is between the 10mm at 1.5mm for said feed probes inner core diameter.
Said filler adopts polyimides.
The present invention's beneficial effect compared with prior art is:
1, the present invention adopts tube-in-tube structure metal feed probes to the feed that is coupled of paster under the radiation; Directly be connected feed with conventional probe and compare,, improved the impedance operator of input port owing to the capacitive coupling effect of sleeve metal feed probes; Through experimental verification; This mode can expand 30%～35% with the antenna bandwidth of operation, increases the frequency coverage of antenna, can fully cover the frequency range of GPS, BD-2, GALILEO and GLONASS;
2, the primary requirement of device is exactly a high reliability on the star, and the coupling feeding classification of design is stable inadequately on structural design in the past, and the present invention passes feed probes and be fixed under the radiation on the paster; Insert within the filler polyimides its lower end; The insulating properties of polyimides makes feed probes and metal feed probes sleeve electricity isolate, thereby makes feed probes play the effect that feed is coupled, simultaneously; Use polyimides also feed probes to be played fixation; Prevent that the feed probes hunting range is excessive and cause damaging, and make the space that feed probes can flexible deformation when carrier vibrates, strengthened the reliability of antenna greatly.
3, form circular polarization through the four-point feed form; Compare from circular polarization and 2 feeds formation circular polarization with more existing; Four-point feed form structure symmetry can effectively suppress the unnecessary higher modes that asymmetric feed structure brings, and improves the purity that antenna element transmits main mould; When expanding the antenna element matching properties; Effectively improve the radiation characteristic of antenna element in wide angular domain scope, improve axial ratio characteristic and the phase center characteristic of antenna element in wide angular domain scope, for characteristics such as the entire gain after the antenna element group battle array, phase center stability are established down good basis.
4, enough cover the frequency range of GPS, BD-2, GALILEO and GLONASS among the present invention for the operating frequency range that guarantees antenna; Radiation patch adopts the form of circular metal plate; And according to operating frequency of antenna; In the radiation diameter of paster at 68mm between the 72mm, under the radiation diameter of paster at 99mm between the 101mm.Consider the reliability of antenna structure; The Thickness Design of radiation patch is that 1mm is between the 3mm; Adopt metal cylinder to connect and be fixed on the home position of reflection cavity between the radiation patch; To between the 17mm, the height of first support column, and adds long radius in metallic support post and paster coupling part and guarantees reliability of structure between the 16mm at 14mm the height of second support column at 15mm.
It is that 44mm realizes four-point feed to the circumference between the 46mm that four feed probes sleeves are evenly distributed on diameter; Its support section height at 7mm between the 9mm; Sleeve part length at 5mm between the 7mm, four metal feed probes inner core diameter at 1.5mm between the 3mm, length at 8mm between the 10mm; Above design can strengthen the capacitive coupling characteristic of the feed probes of form of sleeve, makes the operating frequency of antenna further expand.In order further to improve a day live width angular domain characteristic, the height through paster in suitable increase reflection cavity and the radiation reduces the degree of coupling between feed probes, with the height of first support column 6 at 14mm between the 16mm, improve antenna port reflects coefficient under the operating state.
Description of drawings
Fig. 1 is the array layout sketch map of the stable occultation antenna of multimode phase center of the present invention;
Fig. 2 is the generalized section of the stable occultation antenna element of multimode phase center of the present invention;
Fig. 3 is the stable occultation antenna jacket tubular feed probes schematic layout pattern of multimode phase center of the present invention;
Fig. 4 is the stable occultation antenna jacket tubular feed probes generalized section of multimode phase center of the present invention.
Embodiment
Late 1980s, abroad begin one's study and a kind ofly new survey the earth atmosphere environment method: the Radio Occultation measuring technique based on the gps satellite radio signal.In order to improve the LEO occultation inversion accuracy; Proposed based on GLONASS (GNSS; Global Navigation Satellite System; This system comprises GPS (Global Positioning System, U.S.'s navigational satellite system), BD-2 (Big Dipper, China Navigater satellite system), GALILEO (European navigational satellite system) and GLONASS (Russian navigational satellite system)) detection system.As the critical component in the LEO occultation system, high accuracy occultation antenna technology has become current urgent problem.
The invention provides the stable occultation antenna of a kind of multimode phase center; Improve the impedance operator of input port, can the antenna bandwidth of operation have been expanded 30%～35%, increased the frequency coverage of antenna; Can fully cover the frequency range of GPS, BD-2, GALILEO and GLONASS; Its concrete structure is as shown in Figure 2, and the stable occultation antenna of multimode phase center of the present invention mainly comprises under reflection cavity 1, the radiation in paster 2, the radiation paster 3, four metal feed probes sleeves 4 and inner core 5, first support column 6 and second support columns 7, and feed probes sleeve 4 comprises metal pedestal 42 and filler 41 again; As shown in Figure 4; One end of metal pedestal 42 is a metal column, and the other end is the metal cylinder cavity, and filler 41 fills up the cylindrical cavity of metal pedestal 42.
The aerial radiation sheet is by two-layerly up and down constituting (under the radiation in paster 2 and the radiation paster 3), and lower floor is through sleeve shaped probe coupling feed, and the upper strata is through lower floor's radiation fin coupling feed, and the middle metal column that leans on supports; Reflection cavity is circular bowl structure (the hollow metal cylinder cavity of bottom surface sealing), highly is lower than the upper strata radiation fin.
Reflection cavity 1 is the hollow metal cylinder cavity of a bottom surface sealing; Diameter 150mm is to about the 160mm; Between the height 35 to 40mm; Height through suitable raising reflection cavity 1 can reduce the degree of coupling between feed probes, improves antenna port reflects coefficient under the operating state, improves the low elevation direction gain of antenna.
Four metal feed probes sleeves 4 are vertically mounted on the inner chamber bottom surface of reflection cavity 1 and are the center of circle with the center of circle, inner chamber bottom surface of reflection cavity 1, are evenly distributed on the same circumference.Directly being connected feed with conventional probe compares; Owing to the capacitive coupling effect of sleeve shaped metal feed probes, improved the impedance operator of input port, through experimental verification; This mode can be expanded the antenna bandwidth of operation to 30%～35%, increases the frequency coverage of antenna.
Four sleeve shaped feed probes layouts are as shown in Figure 3; Four feed probes are that 44mm evenly distributes to the circumference between the 46mm along diameter; Four sleeve shaped metal feed probes sections are as shown in Figure 4; The metal column of four metal pedestal 42 1 ends is fixed on the inner chamber bottom surface of said reflection cavity 1 and is the center of circle with the center of circle, inner chamber bottom surface of said reflection cavity 1, is evenly distributed on the same circumference, and paster 2 contacts under the filler 41 in the cylindrical cavity of metal pedestal 42 and the radiation;
Said four feed probes inner cores 5 vertically pass under the radiation paster 2 and be inserted among the filler 41 and between said feed probes inner core 5 and the metal pedestal 42 electricity isolate; Fixed installation between the paster 2 under feed probes inner core 5 and the radiation; And feed probes inner core 5 is concentric with said metal pedestal 42; Support section (metal columns of metal pedestal 42 1 ends) height at 7mm between the 9mm, sleeve (cylindrical cavities of metal pedestal 42 1 ends) part height at 5mm between the 7mm, four feed probes inner core 5 diameters at 1.5mm between the 3mm; Length between the 10mm, adopts the fixing and electricity isolation of polyimides at 8mm between metal feed probes sleeve 4 and its inner core 5.The present invention adopts the four-point feed mode, and the FD feed amplitude equates that phase place differs 90 degree successively; Realize right-handed circular polarization, compare from circular polarization and 2 feeds formation circular polarization with more existing, because the symmetry of feed structure; Can effectively suppress the transmission of unnecessary higher modes, improve the purity of antenna transmission master mould, reduce antenna cross-polarization; When expanding the antenna match characteristic; Effectively improve the radiation characteristic of antenna in wide angular domain scope, improve axial ratio and the phase center characteristic of antenna in wide angular domain scope, for characteristics such as the entire gain after the antenna element group battle array, phase center stability are established down good basis.FD feed can divide feeding network to realize through one minute four merit; Its output directly welds through metal-cored pin and four feed probes sleeves 4; And through screw in reflection cavity 1 chamber back, form the antenna system of sealing, reduce of the influence of environment such as space irradiation to dielectric material.
Radiation patch adopts circular metal plate.But the application broadening working band of paster in the radiation improves directivity, improves the isolation between port.Following paster is mainly realized feed.
In order to realize that antenna gain covers, can antenna sets of the present invention be become antenna 1 * 4 linear array, as shown in Figure 1, the spacing between the adjacent antenna is identical and be 0.5～0.8 times antenna operation wavelength.Compare with the wave beam forming array, this array structure is simple, and 4 unit constant amplitude homophase feeds, has reduced the complexity of feeding network, can better guarantee the antenna broadband character.Because the stable wide angular domain phase center characteristic of antenna element has guaranteed the phase center characteristic of array in certain angular domain scope.
Embodiment:
1, the housing depth of reflection cavity 1 is 35mm, cavity diameter 160mm;
2, the diameter of paster 3 is 68mm in the radiation, and thickness 2mm leaves four circular holes and evenly distributes along same circumference on the paster in the radiation, and Circularhole diameter is 6mm, and the diameter of paster 2 is 106mm under the radiation, thickness 2mm;
3, the height of first support column 6 is 15mm, and diameter 10mm, the height of second support column 7 are 16mm, diameter 10mm; First support column 6 and second support column 7 be through being threaded, in the radiation under paster 3 and the radiation paster 2 through first support column 6 and the 7 screw thread crimping of second support column;
4, four feed probes sleeve 4 equally distributed circumference; Diameter 46mm; Four feed probes sleeve 4 support columns (metal columns of metal pedestal 42 1 ends) are height 8mm, the metal cylinder of diameter 3mm, and sleeve (cylindrical cavities of metal pedestal 42 1 ends) part is height 6mm, internal diameter 6mm, external diameter 8mm metal cylinder cavity; Four feed probes inner core 5 diameter 2mm, height 8.5mm;
5, array is 1 * 4 linear array, and each unit interval equates, spacing 170mm.
Through a large amount of emulation and processing test; This embodiment antenna can fully cover the frequency range of GPS, BD-2, GALILEO and GLONASS; And spend in linear array direction-35+35 degree angular domain scopes in, vertical linear array direction-8 is spent+8 degree phase center stability≤2mm, gain is higher than 10dB; Axial ratio is less than 3dB, and this performance is superior to existing occultation antenna.
Claims (8)
1. occultation antenna that the multimode phase center is stable is characterized in that: comprise under reflection cavity (1), the radiation paster (3), four feed probes sleeves (4), four feed probes inner cores (5), first support column (6) and second support column (7) in paster (2), the radiation; Said feed probes sleeve (4) comprises metal pedestal (42) and filler (41) again, and an end of metal pedestal (42) is a metal column, and the other end is the metal cylinder cavity, and filler (41) fills up the cylindrical cavity of metal pedestal (42);
Said reflection cavity (1) is the hollow metal cylinder cavity of a bottom surface sealing; Said second support column (7) is a metal cylinder; And said second support column (7) is installed in the inner chamber bottom surface home position of reflection cavity (1); Align with the center of circle, inner chamber bottom surface of said reflection cavity (1) in the center of circle, bottom surface of said second support column (7); Paster under the said radiation (2) is for circular foil member and be installed in said second support column (7) top, and paster under the radiation (2) is concentric with second support column (7), and the height of paster under the radiation (2) is lower than the housing depth of said reflection cavity (1); Said first support column (6) is a metal cylinder and is installed on the paster under the said radiation (2), and is concentric with paster (2) under the said radiation; Paster in the said radiation (3) is circular foil member and be installed in said first support column (6) top, is higher than the housing depth of said reflection cavity (1) with paster (3) in the concentric and said radiation of first support column (6);
The metal column of four metal pedestal (42) one ends is fixed on the inner chamber bottom surface of said reflection cavity (1) and is the center of circle with the center of circle, inner chamber bottom surface of said reflection cavity (1); Be evenly distributed on the same circumference, paster (2) contacts under the filler (41) in the cylindrical cavity of metal pedestal (42) and the radiation;
Said four feed probes inner cores (5) vertically pass paster under the radiation (2) and be inserted among the filler (41) and said feed probes inner core (5) and metal pedestal (42) between electricity isolate; Fixed installation between the paster (2) under feed probes inner core (5) and the radiation, and feed probes inner core (5) is concentric with said metal pedestal (42).
2. according to the stable occultation antenna of the said a kind of multimode phase center of claim 1, it is characterized in that: the diameter of paster in the said radiation (3) at 68mm between the 72mm, thickness at 1mm between the 3mm.
3. according to the stable occultation antenna of the said a kind of multimode phase center of claim 1, it is characterized in that: the diameter of paster under the said radiation (2) at 99mm between the 101mm, thickness at 1mm between the 3mm.
4. according to the stable occultation antenna of the said a kind of multimode phase center of claim 1, it is characterized in that: the height of said first support column (6) at 14mm between the 16mm.
5. according to the stable occultation antenna of the said a kind of multimode phase center of claim 1, it is characterized in that: the height of said second support column (7) at 15mm between the 17mm.
6. according to the stable occultation antenna of the said a kind of multimode phase center of claim 1; It is characterized in that: the equally distributed circumference of said feed probes sleeve (4); Diameter at 44mm between the 48mm; The metal column height of one end of the metal pedestal (42) of said feed probes sleeve (4) at 7mm between the 9mm, the cylindrical cavity of metal pedestal (42) part height at 5mm between the 7mm.
7. according to the stable occultation antenna of the said a kind of multimode phase center of claim 1, it is characterized in that: between the 3mm, length 8mm is between the 10mm at 1.5mm for said feed probes inner core (5) diameter.
8. according to the stable occultation antenna of the said a kind of multimode phase center of claim 1, it is characterized in that: said filler (41) adopts polyimides.
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| CN102882013A (en) * | 2012-09-26 | 2013-01-16 | 华为技术有限公司 | Low-profile broadband antenna array and antenna |
| CN102891374A (en) * | 2012-08-17 | 2013-01-23 | 航天恒星科技有限公司 | Tri-band integrated antenna |
| CN103165988A (en) * | 2013-03-13 | 2013-06-19 | 电子科技大学 | Broadband Circularly Polarized RFID Reader Antenna |
| CN104269646A (en) * | 2014-10-23 | 2015-01-07 | 福建京奥通信技术有限公司 | High isolation microstrip antenna |
| CN104916915A (en) * | 2015-05-28 | 2015-09-16 | 冯赵 | Full-frequency-band navigation antenna |
| CN105655716A (en) * | 2014-11-13 | 2016-06-08 | 航天信息股份有限公司 | Microstrip antenna apparatus |
| WO2017113092A1 (en) * | 2015-12-29 | 2017-07-06 | 海能达通信股份有限公司 | Helical antenna, antenna and communication device |
| CN108011190A (en) * | 2017-11-30 | 2018-05-08 | 北京卫星信息工程研究所 | Multiband integration wide area detects reception antenna |
| CN109216918A (en) * | 2017-06-30 | 2019-01-15 | 惠州硕贝德无线科技股份有限公司 | A kind of antenna applied on metal shell and antenna system |
| CN109390671A (en) * | 2018-11-06 | 2019-02-26 | 西安矩阵无线科技有限公司 | Spaceborne high-precision navigator fix antenna |
| CN109888454A (en) * | 2018-12-29 | 2019-06-14 | 瑞声精密制造科技(常州)有限公司 | A kind of encapsulating antenna mould group and electronic equipment |
| CN110739532A (en) * | 2019-10-30 | 2020-01-31 | 上海华测导航技术股份有限公司 | ultra-wideband high-precision satellite navigation antenna |
| CN111146573A (en) * | 2019-12-20 | 2020-05-12 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | High-precision navigation antenna designed based on disc excitation cup-shaped antenna |
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| CN102891374B (en) * | 2012-08-17 | 2015-04-22 | 航天恒星科技有限公司 | Tri-band integrated antenna |
| CN102882013A (en) * | 2012-09-26 | 2013-01-16 | 华为技术有限公司 | Low-profile broadband antenna array and antenna |
| CN103165988A (en) * | 2013-03-13 | 2013-06-19 | 电子科技大学 | Broadband Circularly Polarized RFID Reader Antenna |
| CN104269646A (en) * | 2014-10-23 | 2015-01-07 | 福建京奥通信技术有限公司 | High isolation microstrip antenna |
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| CN104916915A (en) * | 2015-05-28 | 2015-09-16 | 冯赵 | Full-frequency-band navigation antenna |
| WO2017113092A1 (en) * | 2015-12-29 | 2017-07-06 | 海能达通信股份有限公司 | Helical antenna, antenna and communication device |
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| CN109390671B (en) * | 2018-11-06 | 2020-08-14 | 西安矩阵无线科技有限公司 | Satellite-borne high-precision navigation positioning antenna |
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| 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 |
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