CN108011190B - Multi-frequency-band integrated wide-area detection receiving antenna - Google Patents
Multi-frequency-band integrated wide-area detection receiving antenna Download PDFInfo
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- CN108011190B CN108011190B CN201711231847.0A CN201711231847A CN108011190B CN 108011190 B CN108011190 B CN 108011190B CN 201711231847 A CN201711231847 A CN 201711231847A CN 108011190 B CN108011190 B CN 108011190B
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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
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/288—Satellite antennas
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/104—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
Abstract
The invention provides a multi-band integrated wide area detection receiving antenna, which comprises: the antenna consists of an L-frequency band multi-beam and VHF-frequency band shaped beam antenna array; the L-frequency band multi-beam antenna array comprises an upper sub-array (1), a left sub-array (2) and a right sub-array (3) which are fixedly arranged on a support (4) and are arranged in a trapezoid shape, wherein a gap is formed between every two adjacent sub-arrays; the VHF frequency band shaped beam antenna array comprises two VHF frequency band radiating units (5a and 5b) and a VHF frequency band feed network (6), wherein the VHF frequency band radiating units are positioned at the gap position between two adjacent sub-arrays, and the two VHF frequency band radiating units (5a and 5b) are subjected to constant-amplitude reverse phase synthesis by the VHF frequency band feed network (6) arranged on a support (4) to obtain the beam of the VHF frequency band shaped beam antenna array. The invention simultaneously realizes ground-based shaped beams of a VHF frequency band and high-gain simultaneous multi-beams of an L frequency band, and meets the requirements of AIS and ADS-B integrated system satellite-based wide area detection.
Description
Technical Field
The invention belongs to the technical field of satellite antennas, and relates to a multi-band integrated wide area detection receiving antenna.
Background
The satellite carries an AIS (automatic Identification System) and an ADS-B (automatic dependent Surveillance-Broadcast) system, can collect data sent by an AIS terminal and an ADS-B terminal in a visible area under the satellite, and forwards the data to a ground station, so that services such as supervision, coordination, anti-collision and the like are provided for civil aircrafts and ships. The satellite-based data acquisition system can break through the restriction of the ground detection on the terrain environment, has wider detection range and is increasingly widely applied at home and abroad.
The wide area detection requires that antenna beams have a wide area coverage capacity with certain gain, and different requirements on antenna gain and instantaneous coverage are provided due to different detection objects of the ADS-B system and the AIS system. The ADS-B antenna works in an L frequency band (1090ES mode 1090MHz), the system has high requirements for antenna gain, the gain in the beam width is required to reach 7-10 dB according to the difference of the track height, and a plurality of high-gain beams are required to be generated simultaneously for realizing wide area coverage and anti-collision, and are usually realized by using an array. On the other hand, the AIS antenna operates in the VHF band (162MHz), and the wavelength is in the meter level, so the AIS antenna has a large size, large-scale array formation is not possible, and to achieve wide-area coverage, a ground-based shaped beam needs to be achieved with a small number of antennas for link loss caused by large-view path loss.
The document 'Multi-Beam Antenna for Space-Based ADS-B' proposes a Multi-Beam array Antenna, and 7 beams are formed by spatial arrangement and network synthesis of 4 sub-arrays; the document "novel space-based ADS-B system deployable antenna structure design" proposes to use 7 deployable helical antennas to achieve 7 beams. The designs are only applied to ADS-B single systems, and the problem of how to fuse with VHF frequency band antennas is not involved.
The document "Deployment vertical large CFRP high-gain antenna for AIS signals" proposes a deployable helical antenna scheme for a space-based AIS application, wherein the helical antenna occupies a large installation area although the weight is light and the height is low after being retracted, and the Deployment control mechanism of the helical antenna with such a large size is complex. The document "Compact antenna for Automatic Identification System (AIS)" proposes an AIS patch antenna, the size of the antenna floor is 70cm × 70cm, and the document "minor array antenna Using Artificial Magnetic Materials for Satellite-Based AIS System" proposes a planar antenna Based on Artificial electromagnetic Materials, the size of the antenna is reduced to 50cm × 50cm, and the antenna has a square radiation aperture, which is advantageous in that dual-polarization reception can be realized, and has the advantages of occupying a large installation area and having no space to integrate with the ADS-B antenna. Patent "a satellite antenna suitable for satellite-borne AIS", application number: CN201521064444.8, which represents a similar type of AIS antenna in inverted F form, has a narrow profile to reduce the installation area and provide linearly polarized reception, but the radiation characteristic and port characteristic of the inverted F antenna are relatively susceptible to the installation environment, and it is usually ensured that there is no other metal around the installation site, so it is not convenient to integrate with the ADS-B antenna. In addition, some commercial microsatellites adopt a monopole antenna array to realize shaped beams in a VHF frequency band, and similar to an inverted F antenna, the monopole antenna is extremely easy to be influenced by the installation environment, the radiation pattern is not easy to control, and different star structures are often required to be optimized again.
One of the development trends of satellite-mounted data acquisition systems is multi-system integration, and the conventional ADS-B antenna array or AIS antenna cannot meet the requirements of AIS and ADS-B system integration because the integrated design and implementation of the antenna are not considered on the whole.
Disclosure of Invention
The invention aims to solve the problem that the existing ADS-B antenna array or AIS antenna cannot take the integrated design and implementation of the antenna into consideration on the whole and cannot meet the requirement of AIS and ADS-B system integration.
The invention provides a multi-band integrated wide area detection receiving antenna, which is a satellite-borne L, VHF frequency band integrated wide area detection receiving antenna suitable for an ADS-B and AIS integrated system.
The invention provides a multi-band integrated wide area detection receiving antenna, which comprises: the antenna consists of an L frequency band multi-beam antenna array and a VHF frequency band shaped beam antenna array; the L-band multi-beam antenna array comprises an upper subarray, a left subarray and a right subarray which are fixedly arranged on the support and are arranged in a trapezoidal shape, wherein a gap exists between every two adjacent subarrays; the VHF frequency band shaped beam antenna array comprises two VHF frequency band radiating units and a VHF frequency band feed network, wherein the two VHF frequency band radiating units are arranged on the support and positioned at the gap position between the two adjacent sub-arrays, and the VHF frequency band feed network arranged on the support performs constant-amplitude reverse-phase synthesis on the two VHF frequency band radiating units to obtain the beam of the VHF frequency band shaped beam antenna array.
Further, as a preferred technical solution of the present invention, in the L-band multi-beam antenna array, an included angle between a horizontal plane and a normal direction of the left side sub-array and the right side sub-array is determined according to a required beam coverage.
Further, as a preferred technical solution of the present invention, each subarray in the L-band multi-beam antenna array includes: the antenna comprises an antenna unit, a sub-array bottom plate, a sub-array feed network and a sub-array multi-beam network; the antenna unit is arranged on the upper side of a sub-array bottom plate fixed on the bracket, the sub-array feed network is arranged in the sub-array bottom plate, and a feed point of the antenna unit is connected with an input port of the sub-array feed network; the output port of the subarray feed network is connected with the input port of the subarray multi-beam network through a cable, and the output port of the subarray multi-beam network is connected with the receiving equipment through a cable.
Further, as a preferred technical solution of the present invention, the subarray feed networks are all passive synthesis networks; and the subarray multi-beam network is an active network.
Further, as a preferred technical solution of the present invention, each of the sub-array multi-beam networks in the L-band multi-beam antenna array includes a low noise amplifier, a power divider, a phase shifter, and a combiner, which are connected in sequence.
Further, as a preferred technical solution of the present invention, each VHF band radiating unit in the VHF band shaped beam antenna array includes: the antenna comprises a radiation piece, a feed assembly, a metal support column and a reflection piece, wherein the radiation piece and the reflection piece are respectively arranged at the top and the bottom of the metal support column; the feed component is vertically fixed on one side of the radiation sheet and is positioned between the radiation sheet and the reflection sheet.
Further, as a preferred technical solution of the present invention, the radiation sheet and the reflection sheet are both rectangular.
Further, as a preferred technical solution of the present invention, the feeding assembly includes a metal probe, a dielectric insulating sleeve and a metal sleeve, wherein the metal probe is vertically fixed on a surface of the radiating patch, and the dielectric insulating sleeve and the metal sleeve are sequentially sleeved on the surface of the metal probe.
Further, as a preferred technical solution of the present invention, the dielectric insulating sleeve and the metal sleeve are sequentially sleeved on the surface of the metal probe in a threaded manner.
Further, as a preferred technical solution of the present invention, the VHF band shaped beam antenna array beam obtained by the VHF band feed network is a saddle-shaped ground shaped beam.
The satellite-borne L, VHF frequency band integrated wide area detection receiving antenna suitable for the ADS-B and AIS integrated system has the advantages that the L frequency band antenna simultaneously generates a plurality of beams to cover the earth view field, the VHF frequency band antenna generates saddle-shaped earth forming beams, the radiation characteristic is not easily influenced by the installation environment, the overall structure of the antenna is compact, the integration level is high, and the antenna is suitable for satellite-based wide area detection of civil ships and civil aircrafts based on the AIS and ADS-B integrated system.
Compared with the prior art, the invention has the advantages that:
(1) the VHF frequency band antenna utilizes the gap arrangement array among the L frequency band antenna arrays, does not additionally occupy the installation space on the surface of a star body, and has compact integral structure and high integration level.
(2) The VHF frequency band radiation unit is provided with a radiation directional diagram with a back direction as a zero point, so that the radiation performance of the radiation directional diagram is not easily influenced by the installation environment; when the antenna is integrated with the L-band antenna array, the L-band antenna array is not affected.
(3) For the L-band array, a plurality of wave beams with different angles are generated by combining the array surface physical arrangement inclination angle and the preset wave beam electrical inclination angle; by combining the passive feed network and the active beam forming network, the implementation mode of simultaneous multi-beam is simplified, and the complexity of the system is reduced.
(4) The invention simultaneously realizes ground forming wave beams in a VHF frequency band and high-gain simultaneous multi-wave beams in an L frequency band, and can meet the requirement of AIS and ADS-B integrated system wide area detection.
Drawings
Fig. 1 is a schematic perspective view of an antenna according to the present invention.
Fig. 2 is a schematic cross-sectional view of an antenna according to the present invention.
Fig. 3 is a schematic structural diagram of a VHF band radiating element according to the present invention.
Fig. 4 is a schematic diagram of the radiation pattern of the VHF band radiating element of the present invention.
Fig. 5 shows the beam-to-ground coverage of the VHF band shaped beam antenna array of the present invention.
Fig. 6 shows a 9-beam generation method of the L-band multi-beam antenna array according to the present invention.
Fig. 7 shows the 9-beam ground coverage of the L-band multi-beam antenna array according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
As shown in FIG. 1, the invention relates to a multi-band integrated wide area detecting and receiving antenna, which is a satellite-borne L, VHF frequency band integrated wide area detecting and receiving antenna suitable for ADS-B and AIS integrated systems, and comprises two parts, namely an L frequency band multi-beam antenna array and a VHF frequency band shaped beam antenna array.
The L-band multi-beam antenna array comprises an upper sub-array 1, a left sub-array 2 and a right sub-array 3 which are fixedly arranged on a support 4 and are arranged in a trapezoid shape, the three sub-arrays are arranged in the trapezoid shape, preferably, an included angle between the normal direction of the left sub-array 2 and the right sub-array 3 and the horizontal plane is α and is determined according to the coverage range of required beams, the distance between the sub-arrays is about 0.5 time of the working wavelength, and a gap exists between any two adjacent sub-arrays.
As shown in fig. 2, the VHF band shaped-beam antenna array includes two VHF band radiating units 5a and 5b and a VHF band feeding network 6, wherein the two VHF band radiating units 5a and 5b are disposed on a support 4 and located at a gap between two adjacent subarrays, and are disposed along a long side of a top surface of a trapezoidal platform; the two VHF frequency band radiation units 5a and 5b are subjected to constant-amplitude reverse phase synthesis by a VHF frequency band feed network 6 arranged on the bracket 4 to obtain the wave beam of the shaped wave beam antenna array of the VHF frequency band, and the distance between the two VHF frequency band radiation units is about 0.2 times of the working wavelength.
The structure of each sub-array in the L-band multi-beam antenna array is shown in fig. 2, and may include: antenna units 11, 21, 31, subarray base plates 12, 22, 32, subarray feed networks 13, 23, 33 and subarray multi-beam networks 14, 24, 34; the antenna units 11, 21 and 31 are mounted on the upper side of a subarray base plate fixed on the support 4, the subarray feed networks 13, 23 and 33 are mounted in the subarray base plate, and feed points of the antenna units 11, 21 and 31 are connected with input ports of the subarray feed networks 13, 23 and 33; the output ports of the sub-array feed networks 13, 23, 33 are connected to the input ports of the sub-array multi-beam networks 14, 24, 34 through cables, so that the output signals are sent to the input ports of the sub-array multi-beam networks through cables, and the output ports of the sub-array multi-beam networks 14, 24, 34 are connected to the receiving device through cables, so that the output signals of the sub-array multi-beam networks are sent to the receiving device through cables. Preferably, the L-band multi-beam antenna array simultaneously generates a plurality of beam splices covering the field of view over the ground.
Preferably, the sub-array feed networks 13, 23, and 33 of the L-band multi-beam antenna array are all passive synthesis networks; and the subarray multi-beam network is an active network; each of the sub-array multi-beam networks 14, 24, and 34 of the L-band multi-beam antenna array includes a low noise amplifier, a power divider, a phase shifter, and a combiner, which are connected in sequence; after each path of signals input into the subarray multi-beam network is amplified, the signals are divided into n paths by the power divider, wherein n is the number of beams formed by the subarray, the phase shifting is respectively carried out, the phase shifting phase is determined according to the required beam direction, and the signals after phase shifting are synthesized into n paths of signals through the combiner to be output.
In the present invention, the structure of each VHF band radiating element in the VHF band shaped beam antenna array is shown in fig. 3, and specifically includes: the antenna comprises a radiation sheet 51, a feed component 52, a metal support column 53 and a reflector 54, wherein the radiation sheet 51 and the reflector 54 are respectively installed at the top and the bottom of the metal support column 53, and preferably, the installation point is located at the geometric center of the radiation sheet and the reflector; for the convenience of being fused with the L-band multi-beam antenna array, the horizontal part of the radiation sheet 51 and the reflection sheet 54 are both long and narrow rectangles; the feeding member 52 is perpendicularly fixed to one side of the radiation plate 51 and is located between the radiation plate 51 and the reflection plate 54.
The feeding component 52 may include a metal probe 521, a dielectric insulating sleeve 522 and a metal sleeve 523, wherein the metal probe 521 is perpendicularly fixed on the surface of the radiating patch 51, and the dielectric insulating sleeve 522 and the metal sleeve 523 are sequentially sleeved on the surface of the metal probe 521. Preferably, the connection between the metal probe 521 and the radiation sheet 51 is realized by a metal screw; the surface of the metal probe 521 is sequentially sleeved with a dielectric insulating sleeve 522 and a metal sleeve 523 in a thread manner. Because the connection is in a full mechanical mode, higher reliability can be ensured.
The VHF band radiating elements 5a and 5b have radiation patterns facing away from the zero point, and the radiation characteristics are not easily affected by the installation environment. The VHF frequency band shaped beam antenna array beam obtained by the VHF frequency band feed network 6 is a saddle-shaped ground shaped beam.
Therefore, the structure has the characteristics of compact structure, high integration level and high reliability, simultaneously realizes ground-based shaped beams in a VHF frequency band and high-gain simultaneous multi-beam in an L frequency band, and meets the requirements of AIS and ADS-B integrated system satellite-based wide area detection.
In order to verify that the antenna of the present invention has the function of simultaneously realizing ground forming beams in the VHF band and high-gain simultaneous multi-beam in the L band, a verification example is specifically listed for description.
In this verification example, a multi-band integrated wide area detection receiving antenna is provided, which is composed of two major parts, namely an L-band multi-beam antenna array and a VHF-band shaped beam antenna array.
As shown in fig. 1, the L-band multi-beam antenna array includes an upper sub-array 1, a left sub-array 2, a right sub-array 3, and a support 4, where the three sub-arrays are disposed in a trapezoid shape, in this embodiment, an included angle between a normal direction of the upper sub-array 1 and a horizontal plane is 90 degrees, and an included angle between a normal direction of the left sub-array 2 and a normal direction of the right sub-array 3 and the horizontal plane is 45 degrees; the upper sub-array 1 includes 10 antenna elements 11 arranged in a 2 × 5 array, and the left sub-array 2 and the right sub-array 3 each include 15 antenna elements 21, 31 arranged in a 3 × 5 array, with an array pitch of 140 mm.
As shown in fig. 2, each subarray of the L-band multi-beam antenna array includes antenna elements 11, 21, 31, subarray base plates 12, 22, 32, subarray feed networks 13, 23, 33, and subarray multi-beam networks 14, 24, 34.
The VHF frequency band shaped beam antenna array comprises two VHF frequency band radiation units 5a and 5b, and is placed in a gap between three sub-arrays 1, 2 and 3 of the L frequency band multi-beam antenna array, and in the embodiment, the distance between the two VHF frequency band radiation units is 374 mm. In order to reduce the shielding of the L-band multi-beam antenna by the VHF-band radiating unit, the VHF-band radiating unit is placed by inclining 22.5 degrees.
As shown in fig. 3, the VHF band radiating element includes a radiating plate 51, a feeding component 52, a metal supporting column 53 and a reflecting plate 54. In this embodiment, the radiation sheet 51, the reflection sheet 54 and the metal support column 53 are connected, the metal probe 521 and the radiation sheet 51 are connected by a metal screw, and the dielectric insulating sleeve 522 and the metal probe 521 are connected by threads. Because the connection is in a full mechanical mode, higher reliability can be ensured. The dielectric insulating sleeve is made of polyimide which is a mature spacecraft material, so that the requirement of the space environment is met. The feeding components 521, 522 and 523 are used for introducing capacitive coupling, and because the VHF band has a long wavelength, if the feeding probe is directly fed, the feeding probe is too long, which may cause inductance at the port, and the use of the feeding components can effectively improve the impedance characteristics of the port.
By adjusting the length of the horizontal part of the radiation sheet 51 of the VHF band radiation unit, the length of the reflector sheet 54 and the distance between the two, the VHF band radiation unit has a radiation pattern with a back direction as a zero point, and the shape of the pattern is as shown in fig. 4. In this embodiment, the length of the horizontal portion of the radiation sheet 51 is 704mm, the length of the reflection sheet 54 is 716mm, and the distance between the two is 110 mm. Signals received by the two VHF band radiating units 5a and 5b are subjected to constant-amplitude phase-reversal synthesis through the VHF band feed network 6, so that a saddle-shaped ground-to-ground shaped beam can be formed, and the beam coverage condition is shown in fig. 5.
In this embodiment, the antenna units 11, 21, and 31 are in the form of air microstrip, and the main structure of this form is metal, so that the space adaptability is good. The antenna units 11, 21 and 31 are arranged on the upper sides of the sub-array bottom plates 12, 22 and 32, the sub-array feed networks 13, 23 and 33 are arranged in the sub-array bottom plates 12, 22 and 32, the bottom plates of the antenna units, the sub-array bottom plates and the feed network external shields form a whole in structure, and the feed points of the antenna units are directly connected with the input of the sub-array feed networks. The subarray feed networks are passive networks 13, 23 and 33, and the subarray multi-beam networks are active networks 14, 24 and 34, so that the antenna units 11, 21 and 31, the subarray base plates 12, 22 and 32, and the subarray feed networks 13, 23 and 33 can be used as extra-cabin equipment, and the subarray multi-beam networks 14, 24 and 34 can be used as in-cabin equipment. The output signals of the sub-array feed networks 13, 23, 33 are connected to the sub-array multi-beam networks 14, 24, 34 by cables.
The multi-beam generation method is illustrated by taking an example that an L-band multi-beam antenna array generates 9 beams: the sub-array feed network 13 of the upper sub-array synthesizes 2 rows and 5 columns of antenna units according to the rows, synthesizes 5 paths of signals and outputs the signals to be sent to the corresponding sub-array multi-beam network 14; the sub-array feed networks 23 and 33 of the left/right sub-arrays synthesize the antenna units of 3 rows and 5 columns according to the columns, synthesize the signals into 5 paths of signals, and send the signals into corresponding sub-array multi-beam networks 24 and 34; the schematic block diagram of each subarray multi-beam network is shown in fig. 6, 5 paths of input signals are respectively amplified, and each path of signals is divided into 3 paths by a power divider to obtain 15 paths of signals; respectively shifting the phase of the 15 paths of signals, and synthesizing the signals after phase shifting into 3 paths of signals through a combiner to output; the three subarray multi-beam networks output 9 paths of signals in total. Fig. 7 shows the actual measurement results of 8dB coverage of 9 beams, with the upper sub-array 1 generating beam 1, beam 2, and beam 3, the left sub-array 2 generating beam 4, beam 5, and beam 6, and the right sub-array 3 generating beam 7, beam 8, and beam 9.
In conclusion, the L-band multi-beam antenna array can simultaneously generate a plurality of beams to splice and cover the field of view to the ground; the two VHF frequency band radiating units are fed and synthesized by a VHF frequency band feeding network to form a saddle-shaped ground forming beam. Meanwhile, high-gain simultaneous multi-beam of ground-based shaped beams in a VHF frequency band and high-gain simultaneous multi-beam of an L frequency band are realized, and the requirements of AIS and ADS-B integrated system satellite-based wide area detection are met; the method is particularly suitable for civil ship and civil aircraft satellite-based wide area detection based on AIS and ADS-B integrated systems with high integration level requirements and high beam coverage requirements.
It should be noted that the above description is only a preferred embodiment of the present invention, and it should be understood that various changes and modifications can be made by those skilled in the art without departing from the technical idea of the present invention, and these changes and modifications are included in the protection scope of the present invention.
Claims (10)
1. A multi-band integrated wide area detection receiving antenna is characterized in that the antenna consists of an L-band multi-beam antenna array and a VHF-band shaped beam antenna array; the L-frequency band multi-beam antenna array comprises an upper sub-array (1), a left sub-array (2) and a right sub-array (3) which are fixedly arranged on a support (4) and are arranged in a trapezoid shape, wherein a gap is formed between every two adjacent sub-arrays; the VHF frequency band shaped beam antenna array comprises two VHF frequency band radiating units (5a and 5b) and a VHF frequency band feed network (6), wherein the two VHF frequency band radiating units (5a and 5b) are respectively arranged on a support (4) along the long edge of the trapezoidal table top surface and are positioned at the gap position between two adjacent sub-arrays, and the two VHF frequency band radiating units (5a and 5b) are subjected to constant-amplitude reverse phase synthesis by the VHF frequency band feed network (6) arranged on the support (4) to obtain the beam of the VHF frequency band shaped beam antenna array.
2. The multiband integrated wide area sounding receiving antenna of claim 1, wherein the angle between the normal direction of the left side sub-array (2) and the right side sub-array (3) and the horizontal plane is determined according to the required beam coverage in the L-band multi-beam antenna array.
3. The multiple band-integrated wide area sounding receive antenna of claim 1, wherein each subarray in the L-band multi-beam antenna array comprises: antenna units (11, 21, 31), sub-array substrates (12, 22, 32), sub-array feed networks (13, 23, 33) and sub-array multi-beam networks (14, 24, 34); the antenna unit (11, 21, 31) is arranged on the upper side of a subarray base plate fixed on a support (4), the subarray feed network (13, 23, 33) is arranged in the subarray base plate, and a feed point of the antenna unit (11, 21, 31) is connected with an input port of the subarray feed network (13, 23, 33); output ports of the subarray feed network (13, 23, 33) are connected with input ports of the subarray multi-beam network (14, 24, 34) through cables, and output ports of the subarray multi-beam network (14, 24, 34) are connected with receiving equipment through cables.
4. The multiband integrated wide area probe receive antenna of claim 3, wherein the subarray feed networks (13, 23, 33) are all passive synthesis networks; and the sub-array multi-beam network (14, 24, 34) is an active network.
5. The multiband integrated wide area detection receiving antenna of claim 3, wherein the subarray multi-beam network (14, 24, 34) in the L-band multi-beam antenna array comprises a low noise amplifier, a power divider, a phase shifter, and a combiner, which are connected in sequence.
6. The multiple band-integrated wide area probe receiving antenna of claim 1, wherein each VHF band radiating element in the VHF band shaped beam antenna array comprises: the antenna comprises a radiation sheet (51), a feed component (52), a metal support column (53) and a reflector sheet (54), wherein the radiation sheet (51) and the reflector sheet (54) are respectively arranged at the top and the bottom of the metal support column (53); the feeding component (52) is vertically fixed on one side of the radiation sheet (51) and is positioned between the radiation sheet (51) and the reflection sheet (54).
7. The multiple band-integrated wide area probe receiving antenna of claim 6, wherein the radiating patch (51) and the reflecting patch (54) are rectangular.
8. The multiband integrated wide area detection receiving antenna of claim 6, wherein the feeding component (52) comprises a metal probe (521), a dielectric insulating sleeve (522) and a metal sleeve (523), wherein the metal probe (521) is vertically fixed on the surface of the radiating patch (51), and the dielectric insulating sleeve (522) and the metal sleeve (523) are sequentially sleeved on the surface of the metal probe (521).
9. The multi-band integrated wide area probe receiving antenna of claim 8, wherein the surface of the metal probe (521) is sequentially sleeved with the dielectric insulating sleeve (522) and the metal sleeve (523) in a threaded manner.
10. The multiband integrated wide area detection receiving antenna of claim 1, wherein the VHF band shaped beam antenna array beam obtained by the VHF band feeding network (6) is a saddle-shaped ground shaped beam.
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| CN108011190A (en) | 2018-05-08 |
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