CN102437430A - L/C dual-band feed source - Google Patents
L/C dual-band feed source Download PDFInfo
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- CN102437430A CN102437430A CN2011102808508A CN201110280850A CN102437430A CN 102437430 A CN102437430 A CN 102437430A CN 2011102808508 A CN2011102808508 A CN 2011102808508A CN 201110280850 A CN201110280850 A CN 201110280850A CN 102437430 A CN102437430 A CN 102437430A
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Abstract
The invention relates to an L/C dual-band feed source, belonging to a feed source of a radar reflector antenna. The L/C dual-band feed source comprises an L-band feed source, a C-band feed source, a choke groove, a feedback type coaxial waveguide transformer and a standard circular waveguide, the L-band feed source and the C-band feed source are embedded as a whole and have a compact structure and small size, the degree of isolation between the two band feed sources is high, and the mutual coupling between the two band feed sources is small; the L-band feed source and the C-band feed source are arranged at the focus of a reflector and share the same radar reflector for operation, and the phase centers of the L-band feed source and the C-band feed source are overlapped; and the choke groove is additionally arranged on the two sides of the L-band feed source, and edge radiating characteristics are improved. The L/C dual-band feed source has a good performance in amplitude distribution and phase distribution within the radiating angle of the reflector, and can well meet the requirements of radar antenna feed sources with low side lobe-shaped reflectors.
Description
Technical field
The invention belongs to the feed that reflector antenna is used, particularly a kind of L of common reflective surface, C two waveband feed.
Background technology
At present, shared reflecting surface and the two waveband feed under different polarization modes of working alone separately is a wave band feed mostly is positioned at the reflecting surface along and just presents.China's utility model patent " dual-band antenna four function feeds " (application number: 99208073.8) disclosed; Be that the C-band feed is made in one on the whole with Ku wave band feed through series feed the connection; It is placed on the focus of parabolic antenna; Be connected with external signal through 4 waveguide delivery outlets, realize twoly receiving, two function, can't satisfy feed amplitude distribution and PHASE DISTRIBUTION performance in the illumination angle scope of two wave bands.China's utility model patent " C/Ku two waveband, dual polarization rear feed antenna " (application number: 98202706.0) disclosed; Be a kind of two waveband, dual polarization compound feed; The C-band signal is the coaxial waveguide transmission; Level and perpendicular polarization are probe and window output or are probe or are window output; The straight-through waveguide that the Ku band signal is made for the coaxial waveguide inner wire, level and perpendicular polarization are the quadrature waveguide, and it can't satisfy feed amplitude distribution and PHASE DISTRIBUTION performance in the illumination angle scope of two wave bands.
Summary of the invention
The objective of the invention is to the said deficiency of background technology; A kind of radar feed of working simultaneously at L, C two waveband common reflective surface is provided; The feed amplitude distribution in the illumination angle scope that has realized two waveband is functional, can the fine requirement of satisfying as Low Sidelobe figuration reflecting surface radar antenna feed.
Technical scheme of the present invention is: a kind of L, C two waveband feed, comprise L-band feed, C-band feed, choke groove, connecting plate, and it is characterized in that: L-band feed actinal surface and C-band feed actinal surface are in same horizontal plane, install to overlap with phase center; The L-band feed is made up of two L-band loudspeaker, and two L-band loudspeaker are the Y-axis symmetry about feed mounting center line, are positioned at the horizontal both sides of C-band feed; C-band feed central axis overlaps with two waveband feed mounting center; The actinal surface center distance of two L-band loudspeaker is 120mm ~ 160mm, and the internal diameter of C-band feed is 78mm ~ 94mm; Respectively there is one section circular lance at the loudspeaker that two L-band loudspeaker and C-band feed the join place of dehiscing, and this otch is closely nested with C-band feed outside circular arc metallic walls; Choke groove is installed on the outer wall of L-band loudspeaker; Use the connecting plate fixed with relative positions between L-band feed and the C-band feed.Its beneficial effect is that the feed of two wave bands amplitude distribution and PHASE DISTRIBUTION in the illumination angle scope are functional; Phase center overlaps; Two waveband feed edge illumination level is all greater than-15dB in the illumination angle scope of horizontal plane-54 °～+ 54 °; PHASE DISTRIBUTION can the fine requirement of satisfying as Low Sidelobe figuration reflecting surface radar antenna feed in ± 30 °.
Aforesaid a kind of L, C two waveband feed; It is characterized in that: the actinal surface center distance of two L-band loudspeaker is 140mm; The internal diameter of C-band feed is 86mm, and its beneficial effect is that the feed of two wave bands amplitude distribution and PHASE DISTRIBUTION in the illumination angle scope are functional.
Aforesaid a kind of L, C two waveband feed is characterized in that: said L-band feed is become by pyramid loudspeaker or conical horn group formation.Its beneficial effect is: aperture field is evenly distributed, and magnitude-phase characteristics is good, and the mutual coupling influence is little between the C-band feed.
Aforesaid a kind of L, C two waveband feed is characterized in that: said C-band feed is bimodulus conical horn or corrugated horn form.Its beneficial effect is: the C-band feed can be realized circular polarization, and magnitude-phase characteristics is good in the frequency band.
Aforesaid a kind of L, C two waveband feed, it is characterized in that: said choke groove is the metalwork of a bending, is fixed on and forms symmetrical groove, groove depth 30mm ~ 45mm, groove width 15mm ~ 25mm on two horizontal outer walls of L-band feed.Its beneficial effect is: the choke groove that installs additional in L-band feed both sides has improved the edge illumination characteristic of L-band feed.
Aforesaid a kind of L, C two waveband feed is characterized in that: said groove depth 37mm, groove width 20mm.Its beneficial effect is: the edge illumination characteristic of L-band feed is better.
Aforesaid a kind of L, C two waveband feed is characterized in that: it also comprises conversion of feedback type coaxial waveguide and standard round waveguide, and the conversion of feedback type coaxial waveguide is adopted in said L-band feed feed input; C-band feed feed is input as the standard round Waveguide interface.Its beneficial effect is: L-band feed voltage standing wave(VSW) and C-band feed voltage standing wave ratio are little, are easy to be connected with other system.
Description of drawings
Fig. 1 is the front view of two waveband feed.
Fig. 2 is the rearview of two waveband feed.
Fig. 3 is the top plan view of two waveband feed.
Embodiment
The explanation of mark among the figure: L-band feed 1; C-band feed 2; L-band loudspeaker 3; First connecting plate 4; Second connecting plate 5; The 3rd connecting plate 6; Choke groove 7; Feedback type coaxial waveguide conversion 8; Standard round waveguide 9.
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
As shown in Figure 1; The present invention is made up of L-band feed 1 and C-band feed 2; The L-band feed is made up of two L-band loudspeaker 3, and two L-band loudspeaker 3 are symmetrical about the center Y-axis of C-band feed 2, and L-band feed actinal surface and C-band feed actinal surface are in same horizontal plane.
The actinal surface center distance of two L-band loudspeaker 3 is 120mm ~ 160mm, preferably 140mm; The internal diameter of C-band feed 2 is 78mm ~ 94mm, 86mm preferably, and two L-band loudspeaker 3 are cut off with the position that C-band feed 2 overlaps, and C-band feed 2 is nested between two L-band loudspeaker 3.
As shown in Figure 2; Two L-band loudspeaker 3 of present embodiment are connected with pin by two first connecting plates 4 with C-band feed 2 confirms its relative position; Two second connecting plate symmetry placements about in the of 5; Be fixed on C-band feed 2 outer walls and fill L-band loudspeaker 3 and 2 spaces of C-band feed, two the 3rd connecting plates 6 be fixed on two L-band loudspeaker 3 with guarantee between feed nested closely, sound construction.
As shown in Figure 3, choke groove 7 is the metalwork of a L type bending, is fixed on two L-band loudspeaker, the 3 horizontal outer walls to form symmetrical groove groove depth 30mm ~ 44mm, groove width 17mm ~ 23mm, groove depth 37mm preferably, groove width 20mm.Feedback type coaxial waveguide conversion 8 is as the coaxial input interface of L-band loudspeaker 3, and standard round waveguide 9 is standard round waveguide input interfaces of C-band feed 2.
Owing to adopt such scheme, L-band feed 1 works alone with C-band feed 2 separately, between two wave band feeds the mutual coupling influence little, phase center overlaps.The two waveband feed receives and the emission process contrary.When the two waveband feed is operated in emission state following time; Two-way constant amplitude homophase L-band signal enters into two feedback type coaxial waveguides conversion 8 respectively; It is synthetic and radiate with horizontal polarization mode in the space to deliver to two L-band loudspeaker 3 back then, and choke groove 7 distributes through the actinal surface edge current that changes L-band feed 1 and improves its secondary lobe characteristic; The C-band signal gets into C-band feed 2 backs through standard round waveguide 9 and goes out to space radiation, and its polarization characteristic is by the C-band signal deciding of input.All greater than-15dB, PHASE DISTRIBUTION can the fine requirement of satisfying as Low Sidelobe figuration reflecting surface radar antenna feed in ± 30 ° for two waveband feed edge illumination level in the angular range of horizontal plane-54 °～+ 54 °.
Claims (8)
1. a L, C two waveband feed comprise L-band feed, C-band feed, choke groove, connecting plate, and it is characterized in that: L-band feed actinal surface and C-band feed actinal surface are in same horizontal plane, install to overlap with phase center; The L-band feed is made up of two L-band loudspeaker, and two L-band loudspeaker are the Y-axis symmetry about feed mounting center line, are positioned at the horizontal both sides of C-band feed; C-band feed central axis overlaps with two waveband feed mounting center; The actinal surface center distance of two L-band loudspeaker is 120mm ~ 160mm, and the internal diameter of C-band feed is 78mm ~ 94mm; Respectively there is one section circular lance at the loudspeaker that two L-band loudspeaker and C-band feed the join place of dehiscing, and this otch is closely nested with C-band feed outside circular arc metallic walls; Choke groove is installed on the outer wall of L-band loudspeaker; Use the connecting plate fixed with relative positions between L-band feed and the C-band feed.
2. two waveband feed according to claim 1 is characterized in that: the actinal surface center distance of two L-band loudspeaker is 140mm, and the internal diameter of C-band feed is 86mm.
3. two waveband feed according to claim 1 is characterized in that: said L-band feed is become by pyramid loudspeaker or conical horn group formation.
4. two waveband feed according to claim 1 is characterized in that: the C-band feed is bimodulus conical horn or corrugated horn form.
5. according to claim 1,2 or 3 described two waveband feeds, it is characterized in that: said choke groove is the metalwork of a bending, is fixed on and forms symmetrical groove, groove depth 30mm ~ 45mm, groove width 15mm ~ 25mm on two horizontal outer walls of L-band feed.
6. two waveband feed according to claim 5 is characterized in that: said groove depth 37mm, groove width 20mm.
7. according to claim 1,2,3 or 4 described two waveband feeds, it is characterized in that: it also comprises conversion of feedback type coaxial waveguide and standard round waveguide, and the conversion of feedback type coaxial waveguide is adopted in said L-band feed feed input; C-band feed feed is input as the standard round Waveguide interface.
8. two waveband feed according to claim 5 is characterized in that: it also comprises conversion of feedback type coaxial waveguide and standard round waveguide, and the conversion of feedback type coaxial waveguide is adopted in said L-band feed feed input; C-band feed feed is input as the standard round Waveguide interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102808508A CN102437430A (en) | 2011-09-21 | 2011-09-21 | L/C dual-band feed source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102808508A CN102437430A (en) | 2011-09-21 | 2011-09-21 | L/C dual-band feed source |
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| CN102437430A true CN102437430A (en) | 2012-05-02 |
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| CN2011102808508A Pending CN102437430A (en) | 2011-09-21 | 2011-09-21 | L/C dual-band feed source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709681A (en) * | 2012-06-25 | 2012-10-03 | 南京长江电子信息产业集团有限公司 | High insulation wave guide crevice transmitting/receiving antenna |
| CN103682574A (en) * | 2012-09-26 | 2014-03-26 | 北京航天长征飞行器研究所 | High temperature-resistant Ka-band wide-beam receiving-transmitting antenna |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0403894A2 (en) * | 1989-06-23 | 1990-12-27 | Hughes Aircraft Company | Nested horn radiator assembly |
-
2011
- 2011-09-21 CN CN2011102808508A patent/CN102437430A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0403894A2 (en) * | 1989-06-23 | 1990-12-27 | Hughes Aircraft Company | Nested horn radiator assembly |
Non-Patent Citations (1)
| Title |
|---|
| 张强等: "L/C双波段高功率微波同轴馈源的辐射特性", 《强激光与粒子束》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709681A (en) * | 2012-06-25 | 2012-10-03 | 南京长江电子信息产业集团有限公司 | High insulation wave guide crevice transmitting/receiving antenna |
| CN103682574A (en) * | 2012-09-26 | 2014-03-26 | 北京航天长征飞行器研究所 | High temperature-resistant Ka-band wide-beam receiving-transmitting antenna |
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Application publication date: 20120502 |