CN218158314U

CN218158314U - Radar cross section test antenna boom

Info

Publication number: CN218158314U
Application number: CN202221961969.1U
Authority: CN
Inventors: 马晓雪; 李锦军; 李玮
Original assignee: Naval Sergeant School Of Chinese Pla
Current assignee: Naval Sergeant School Of Chinese Pla
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-12-27
Anticipated expiration: 2032-07-27

Abstract

The utility model discloses a radar cross section test aerial [ insulated ] support, including target RCS accredited testing organization, target RCS accredited testing organization includes mount pad, manual polarizer, transmission horn antenna and receipt horn antenna demountable installation respectively be in the both ends of polarization revolving stage. The utility model discloses in, utilize target RCS accredited testing organization to replace traditional test body antenna boom structure, install transmission horn antenna and receiving horn antenna angle respectively and position on the polarization revolving stage adjustably, two sets of antennas can erect under level, diversified polarization state such as perpendicular respectively, satisfy the test demand to the target object of awaiting measuring under the not equidirectional angle polarization state, and then cooperate the single-station or the use of two-station tests of target RCS more high-efficiently, improve the convenience and the accuracy of test.

Description

Radar cross section test antenna boom

Technical Field

The utility model relates to an antenna boom technical field, specifically speaking relate to a radar cross section test antenna boom.

Background

The radar scattering cross section is a physical quantity for measuring the strength of an echo generated by a target under the irradiation of radar waves, and is called RCS for short. It is the imaginary area of the target, represented by the projected area of an isotropic reflector having the same echo power in the unit solid angle of reception direction as the defined target.

The calculation of electromagnetic scattering of complex targets is an important aspect of the electromagnetic field problem, and is particularly important in the characterization, identification and design of military targets. It is known that the analysis of radar cross sections of different shapes coated with complex targets is of great significance to the study of stealth technology, and therefore, the test of radar cross sections is not necessarily small. In the existing radar scattering cross section testing technology, an antenna bracket used for testing mostly adopts an integrated structure, namely, a transmitting antenna and a receiving antenna are positioned at the same position, so that the target to be tested is difficult to test from different directions or states.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a can realize radar scattering cross-section test aerial stand of diversified state test is provided.

In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides a radar scattering cross section test antenna boom, includes target RCS accredited testing organization, target RCS accredited testing organization includes mount pad, manual polarizer, transmission horn antenna and receipt horn antenna, manual polarizer is fixed on the mount pad, the adjustable polarization revolving stage of installing on the manual polarizer, transmission horn antenna and receipt horn antenna demountable installation respectively are in the both ends of polarization revolving stage.

Furthermore, adjusting grooves in a strip shape are respectively formed in two ends of the polarization rotating platform, a first antenna mounting disc and a second antenna mounting disc are respectively fixed to the back portions of the transmitting horn antenna and the receiving horn antenna, a first locking nut and a second locking nut are respectively fixed to the back portions of the first antenna mounting disc and the second antenna mounting disc, and the first locking nut and the second locking nut can respectively penetrate through the adjusting grooves in the two ends in a sliding mode and are in locking fit with the polarization rotating platform.

The polarization rotating table is arranged on the base, and the isolation assembly is arranged on the polarization rotating table in the center and separates the transmitting horn antenna from the receiving horn antenna;

keep apart the subassembly and include fixed plate, shield plate and at least two shielding flabellum, the fixed plate laminating extremely the front of polarization revolving stage is fixed between two parties, the shield plate perpendicular to polarization revolving stage to fixed connection to the fixed plate, just inlay on the shield plate and install the connector link, it is a plurality of the shielding flabellum laminates extremely respectively the top surface and the bottom surface of shield plate, and via the connector link with shield plate normal running fit.

The system further comprises a transmitting unit and a receiving unit, wherein the transmitting unit and the receiving unit respectively comprise a mobile trolley and an antenna bracket assembly, the transmitting unit further comprises a vector network analyzer, and the receiving unit further comprises the target RCS testing mechanism;

the method comprises the steps of drawing a mark ring with the radius of R by taking a target object to be detected as the center of a circle, forming a test field in the mark ring, standing the transmitting unit on the mark ring to keep static, and enabling the receiving unit to move along the mark ring and not to coincide with the transmitting unit in position.

Further, the antenna bracket component includes base, lifter and mount table, the base adopts metal material, the lifter adopts non-metal material, the lifter is fixed between two parties on the base, just the top surface of base centers on the lifter evenly encircles and is equipped with a plurality of strengthening ribs, the mount table is fixed the top of lifter, vector network analyzer or target RCS accredited testing organization installs respectively on the mount table.

The vector network analyzer is connected to a communication interface of the main control computer through a radio frequency cable, the radio frequency power amplifier, the low noise amplifier, the directional coupler and the attenuator are all electrically connected to the communication interface of the main control computer, measurement and control software with a time domain gate function is installed in the main control computer, and an output port of the main control computer is connected to the display unit.

Further, the radio frequency power amplifier and the directional coupler may be both mounted on the transmitting unit via a jig, and the low noise amplifier and the attenuator may be both mounted on the receiving unit via the jig.

The beneficial effects of the utility model are embodied in:

the utility model discloses in, utilize target RCS accredited testing organization to replace traditional test body antenna boom structure, install transmission horn antenna and receiving horn antenna angle respectively and position on the polarization revolving stage adjustably, because the polarization revolving stage can carry out 0 ~ 360 rotations, so above-mentioned two sets of strip antennas can be respectively at the level, erect under diversified polarization states such as perpendicular, satisfy the test demand to the target object that awaits measuring under different direction angle polarization states, and then cooperate the use of target RCS's single standing or two standing tests more high-efficiently, improve the convenience and the accuracy of test.

Drawings

Fig. 1 is a top view of the overall structure of an embodiment of the present invention.

Fig. 2 is a front view of an antenna mounting assembly according to an embodiment of the present invention.

Figure 3 is a side view of a target RCS testing mechanism in accordance with an embodiment of the present invention.

Fig. 4 is a front view of a polarization rotation platform according to an embodiment of the present invention.

Fig. 5 is a top view of the isolation assembly in a closed state according to an embodiment of the present invention.

Fig. 6 is a top view of the isolation assembly in an expanded state according to an embodiment of the present invention.

The components in the drawings are labeled as follows: 1. a marker ring; 2. moving the trolley; 3. an antenna bracket assembly; 301. a base; 302. a lifting rod; 303. an installation table; 304. reinforcing ribs; 4. a vector network analyzer; 5. a target RCS testing mechanism; 6. a mounting seat; 7. a manual polarizer; 701. a polarization rotating table; 702. an adjustment groove; 8. a transmitting horn antenna; 801. a first antenna mounting plate; 802. a first lock nut; 9. a receiving horn antenna; 901. a second antenna mounting plate; 902. a second lock nut; 10. an isolation component; 1001. a fixing plate; 1002. a shielding plate; 1003. shielding the fan blades; 1004. a connecting buckle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. It should be noted that if the embodiments of the present invention are described with reference to "first", "second", etc., the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature.

See fig. 1-6.

The utility model provides a radar cross section test antenna boom, including target RCS accredited testing organization 5, target RCS accredited testing organization 5 includes mount pad 6, manual polarizer 7, transmission horn antenna 8 and receipt horn antenna 9, manual polarizer 7 is fixed on the mount pad 6, adjustable installation has polarization revolving stage 701 on the manual polarizer 7, transmission horn antenna 8 and receipt horn antenna 9 respectively demountable installation be in polarization revolving stage 701's both ends.

In an embodiment, two ends of the polarization rotating platform 701 are respectively provided with a strip-shaped adjusting groove 702, the back parts of the transmitting horn antenna 8 and the receiving horn antenna 9 are respectively fixed with a first antenna mounting plate 801 and a second antenna mounting plate 901, the back parts of the first antenna mounting plate 801 and the second antenna mounting plate 901 are respectively fixed with a first locking nut 802 and a second locking nut 902, and the first locking nut 802 and the second locking nut 902 can respectively pass through the adjusting grooves 702 at the two ends in a sliding manner and are in locking fit with the polarization rotating platform 701. By such design, the target RCS testing mechanism 5 is easy to mount and dismount, the transmitting horn antenna 8 or the receiving horn antenna 9 is mounted on the polarization rotating platform 701 through the first antenna mounting plate 801 or the second antenna mounting plate 901 respectively, and the mounting position of the transmitting horn antenna 8 or the receiving horn antenna 9 on the polarization rotating platform 701 is changed by the sliding adjustment of the first locking nut 802 or the second locking nut 902 in the adjustment groove 702;

it should be noted that the target RCS testing mechanism 5 may only perform data collection, not data processing.

In one embodiment, it further comprises an isolation assembly 10, said isolation assembly 10 being centrally mounted on said polarization rotation stage 701 and separating said transmitting feedhorn 8 and receiving feedhorn 9;

isolation component 10 includes fixed plate 1001, shield plate 1002 and at least two shielding flabellum 1003, fixed plate 1001 laminates extremely polarization rotating stage 701's front and fixed in the middle, shield plate 1002 perpendicular to polarization rotating stage 701, and fixed connection to fixed plate 1001, just inlay on the shield plate 1002 and install connector link 1004, it is a plurality of shielding flabellum 1003 laminates respectively extremely the top surface and the bottom surface of shield plate 1002, and via connector link 1004 with shield plate 1002 normal running fit. Design like this, isolation component 10 plays and inhales the wave effect, avoids emission horn antenna 8 with receiving the mutual interference of wave band between the horn antenna 9, helps improving the accuracy of test, can launch as required shielding flabellum 1003 increases the isolation area, reinforcing shielding effect.

In one embodiment, the device comprises a transmitting unit and a receiving unit, wherein the transmitting unit and the receiving unit both comprise a mobile trolley 2 and an antenna bracket assembly 3, the transmitting unit further comprises a vector network analyzer 4, and the receiving unit further comprises a target RCS testing mechanism 5;

making a mark ring 1 with the radius of R by taking a target object to be detected as the center of a circle, forming a test field in the mark ring 1, standing the transmitting unit on the mark ring 1 and keeping still, wherein the receiving unit can move along the mark ring 1 and does not coincide with the position of the transmitting unit;

placing an object to be tested at the center of a circle of the mark ring 1, namely a test center, placing the transmitting unit and the receiving unit on the mark ring 1, forming a test field in the mark ring 1, in the actual test process, standing the transmitting unit and keeping the transmitting unit still, moving the receiving unit along the mark ring 1, sequentially setting three factors of radian of a distance between the receiving unit and the transmitting unit, rotation angle and rotation speed of the object to be tested as independent variables, completing RCS measurement on the object to be tested in the test field, and in single measurement, only changing one of the independent variables, and keeping the other two independent variables unchanged to finally obtain test data of the 'RCS vs angle' and 'RCS vs frequency' of the object;

by the design, multiple independent variables are selected and tested for multiple times, and the double-station RCS measurement test with more accurate and reliable measurement results is facilitated.

In an embodiment, the antenna bracket assembly 3 includes a base 301, a lifting rod 302 and a mounting platform 303, the base 301 is made of metal, the lifting rod 302 is made of nonmetal, the lifting rod 302 is fixed on the base 301 in the middle, the top surface of the base 301 surrounds the lifting rod 302 and is evenly provided with a plurality of reinforcing ribs 304 in a surrounding manner, the mounting platform 303 is fixed on the top of the lifting rod 302, and the vector network analyzer 4 or the target RCS testing mechanism 5 is respectively installed on the mounting platform 303. By the design, the antenna bracket assembly 3 is stable in structure and convenient to assemble and disassemble, and plays a role in supporting the vector network analyzer 4 or the target RCS testing mechanism 5, the antenna bracket assembly 3 is placed on the movable trolley 2, the movable trolley 2 can be manually pushed and can move forward, backward and turn, and the trolley has the functions of fixing, damping and horizontal adjustment, and is convenient for pushing the transmitting unit and the receiving unit to move and adjust the positions;

because this test system is carried out in the open air, because the protection of dampproofing damp proof is carried out to the instrument needs, so can add the canopy in the outside of travelling car 2, play the guard action to accurate instrument.

In one embodiment, the vector network analyzer 4 is connected to a communication interface of the main control computer through a radio frequency cable, the radio frequency power amplifier, the low noise amplifier, the directional coupler and the attenuator are all electrically connected to the communication interface of the main control computer, measurement and control software with a time domain gate function is installed in the main control computer, and an output port of the main control computer is connected to a display unit;

the RCS test related to the device is a set of automatic test and control system based on an intelligent instrument and a main control computer, and has the capacity of data acquisition, analysis and processing, a radio frequency source and a microwave receiver are arranged in the vector network analyzer 4, and the receiving horn antenna 9 and the transmitting horn antenna 8 are respectively connected to an output port and an input port of the vector network analyzer 4 (S21 state), namely the radio frequency source and the microwave receiver are correspondingly arranged;

in the testing process, firstly the main control computer sends a control instruction to the vector network analyzer 4, controls the radio frequency source to throw in radio wave signal energy, receives the radio wave signal energy by the receiving horn antenna 9, transfers the radio wave signal energy to the transmitting horn antenna 8 after the radio wave signal energy is in place, finally transmits the radio wave signal energy to the microwave receiver by the transmitting horn antenna 8 to perform data acquisition, changes an independent variable, repeats a plurality of tests, and finally measures the scattering quantity of the reflected electromagnetic wave of the target object to be tested within a required angle range (0-360 degrees);

by the design, the vector network analyzer 4 is used as a signal receiving and transmitting unit, FFT and IFFT conversion can be realized during frequency sweep test, and the signal receiving and transmitting unit is in communication connection with the main control computer through a radio frequency cable, and the radio frequency cable has high stable-amplitude stable-phase electrical performance and high bending resistance mechanical performance, so that the cable loss can be greatly reduced, and the signal conduction speed can be greatly improved;

the display unit comprises but is not limited to an LCD, a printer and the like, the measurement and control software is used for analyzing the scattering characteristic parameters of the target, realizing one-dimensional imaging, two-dimensional imaging and three-dimensional imaging and finally obtaining the RCS value series parameters of the target, and the time domain gate can improve the test precision;

it should be noted that all the equipment or intelligent instruments used in the RCS test involved in the present device are known in the art, i.e. commercially available.

In an embodiment, the radio frequency power amplifier and the directional coupler may each be mounted on the transmitting unit via a clamp, and the low noise amplifier and the attenuator may each be mounted on the receiving unit via the clamp. By the design, in the test process, when the dynamic range of a high-frequency band is insufficient, the equipment can be clamped and installed on the transmitting unit or the receiving unit in a one-to-one correspondence mode through the clamps, the radio-frequency power amplifier plays a role in compensating loss of a radio-frequency cable and space loss so as to exert the dynamic performance of the vector network analyzer 4, and in order to enable the energy received by the microwave receiver to be matched with the energy at the output port, the directional coupler couples an output signal to the attenuator with 30dB attenuation accessed to the instrument port.

It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the present invention, and that various modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this application.

Claims

1. The utility model provides a radar cross section tests antenna boom which characterized in that: including target RCS accredited testing organization (5), target RCS accredited testing organization (5) are including mount pad (6), manual polarizer (7), transmission horn antenna (8) and receiving horn antenna (9), manual polarizer (7) are fixed on mount pad (6), adjustable installation is gone up in manual polarizer (7) has polarization revolving stage (701), transmission horn antenna (8) and receiving horn antenna (9) demountable installation respectively be in the both ends of polarization revolving stage (701).

2. The radar cross section test antenna mount of claim 1, wherein: two ends of the polarization rotating platform (701) are respectively provided with a strip-shaped adjusting groove (702), the back parts of the transmitting horn antenna (8) and the receiving horn antenna (9) are respectively fixed with a first antenna mounting disc (801) and a second antenna mounting disc (901), the back parts of the first antenna mounting disc (801) and the second antenna mounting disc (901) are respectively fixed with a first locking nut (802) and a second locking nut (902), and the first locking nut (802) and the second locking nut (902) can respectively penetrate through the adjusting grooves (702) at the two ends in a sliding manner and are in locking fit with the polarization rotating platform (701).

3. The radar cross section test antenna mount of claim 1, wherein: further comprising an isolation assembly (10), said isolation assembly (10) being centrally mounted on said polarization rotation stage (701) and separating said transmitting (8) and receiving (9) feedhorns;

isolation component (10) are including fixed plate (1001), shielding plate (1002) and at least two shielding flabellum (1003), fixed plate (1001) laminate extremely the front of polarization rotating stage (701) is fixed between two parties, shielding plate (1002) perpendicular to polarization rotating stage (701), and fixed connection to fixed plate (1001), just inlay on shielding plate (1002) and install connector link (1004), and be a plurality of shielding flabellum (1003) laminate respectively extremely the top surface and the bottom surface of shielding plate (1002), and via connector link (1004) with shielding plate (1002) normal running fit.

4. The radar cross section test antenna mount of claim 1, wherein: the device comprises a transmitting unit and a receiving unit, wherein the transmitting unit and the receiving unit both comprise a moving trolley (2) and an antenna bracket assembly (3), the transmitting unit further comprises a vector network analyzer (4), and the receiving unit further comprises a target RCS testing mechanism (5);

the method comprises the following steps that a mark ring (1) with the radius of R is made by taking a target object to be detected as the circle center, a test field is formed in the mark ring (1), a transmitting unit stands on the mark ring (1) and keeps static, and a receiving unit can move along the mark ring (1) and does not coincide with the transmitting unit in position.

5. The radar cross section test antenna mount of claim 4, wherein: antenna bracket component (3) include base (301), lifter (302) and mount table (303), base (301) adopt metal material, lifter (302) adopt non-metal material, lifter (302) are fixed between two parties on base (301), just the top surface of base (301) centers on the even ring of lifter (302) is equipped with a plurality of strengthening ribs (304), mount table (303) are fixed the top of lifter (302), vector network analyzer (4) or target RCS accredited testing organization (5) are installed respectively on mount table (303).

6. The radar cross section test antenna mount of claim 4, wherein: the vector network analyzer (4) is connected to a communication interface of the main control computer through a radio frequency cable, the radio frequency power amplifier, the low noise amplifier, the directional coupler and the attenuator are all electrically connected to the communication interface of the main control computer, and an output port of the main control computer is connected to the display unit.

7. The radar cross section test antenna mount of claim 6, wherein: the radio frequency power amplifier and the directional coupler may be both mounted on the transmitting unit via a jig, and the low noise amplifier and the attenuator may be both mounted on the receiving unit via the jig.