Variable polarization test system for high-frequency radiation sensitivity horn antenna

Abstract

The utility model provides a variable polarization test system for a high-frequency radiation sensitivity horn antenna, and relates to the technical field of electromagnetic compatibility detection. The variable polarization test system for the high-frequency radiation sensitivity horn antenna comprises a lifting vehicle body, a cabinet is installed on the top of the lifting vehicle body, and a baffle is installed on the cabinet. By arranging the lifting vehicle body, the height of the horn antenna body can be conveniently adjusted, a transmitting antenna is aligned to a tested area to be tested, the height and polarization of the antenna are adjusted, meanwhile, the adjusting steps are simple, operation is convenient, the transmission path from a power amplifier output waveguide port to the antenna is short, loss is low, the system is stable and easy to use, and the vibration resistance is high; the test efficiency is greatly improved, and the waveguide rotary joint is arranged and is installed on the baffle through the rotary joint clamp, so that the waveguide rotary joint can drive the horn antenna body to rotate, and the purpose of angle adjustment is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromagnetic compatibility detection, in particular to a high-frequency radiation sensitivity horn antenna variable polarization test system. BACKGROUND

[0002] With the rapid development of electronic technology, various electrical appliances in life are also increasing, the electromagnetic environment is becoming more and more complex, and the power density is continuously improving. When various electronic and electrical equipment works in the same space at the same time, it will generate a certain intensity of electromagnetic field around it. Whether in life or in the working environment, there are a large number of electromagnetic fields of different frequencies, both natural electromagnetic interference sources such as lightning, static electricity, etc., and strong man-made interference sources such as radar, electronic warfare, communication, etc. The high electric field radiation of the external radio frequency environment is an important part of the complex electromagnetic environment, and the development of modern equipment systems must consider the high radiation field under the complex electromagnetic environment. In the strong electromagnetic environment, in order to enable various electrical and electronic equipment to work normally in the complex electromagnetic environment, the electromagnetic compatibility of the equipment is required to be very high. Among them, the radiation sensitivity test is a test for detecting whether the electronic and electrical equipment can work normally under the high-intensity electromagnetic radiation of different frequencies and amplitudes.

[0003] In the electromagnetic compatibility test of military equipment and subsystems, electric field radiation disturbance test is a widely used test. Desktop equipment is usually placed on a test table at a height of 0.8m in a semi-anechoic chamber, and floor-standing equipment is usually placed on a grounded panel in a semi-anechoic chamber. The radiation sensitivity test equipment usually includes signal source, power amplifier, transmitting antenna, field intensity sensor and other equipment. During the test, the power amplifier radiates the electromagnetic wave of the specified frequency generated by the signal source to the sample to be tested through the transmitting antenna, and the field intensity is monitored through the field sensor. In this way, an electromagnetic interference environment is generated around the sample to be tested, and the working performance of the sample to be tested under different frequency and field intensity interference is detected.

[0004] In electromagnetic compatibility tests, coaxial cables are usually used between various radio frequency devices to transmit test signals. Due to the transmission characteristics of electromagnetic waves, the transmission attenuation of electromagnetic waves in coaxial cables is very small at low frequencies, while the transmission attenuation will rise sharply with the increase of frequency at higher frequencies. The attenuation value of most radio frequency cables per meter can reach 2dB or more at 40GHz, which means that the radio frequency signal will lose nearly half of the power per meter on the transmission cable. The radiation sensitivity test has high requirements for field intensity, which requires that the transmission loss between the power amplifier and the antenna should be minimized as much as possible, so most radio frequency power amplifiers use rectangular waveguide form for the output interface above 18GHz.

[0005] Due to the characteristic that the higher the frequency of electromagnetic wave is, the shorter the wavelength is, the size of the high-frequency transmitting antenna is smaller, the 3dB beam angle of the transmitting antenna is smaller, the directivity of the antenna is higher, the influence of the object behind the antenna on the test is lower, and the transmitting antenna can be directly installed on the waveguide port of the power amplifier. This method can obtain the minimum transmission loss. Since the antenna is directly fixed to the power amplifier, the antenna cannot be conveniently aligned with the measured sample during use. In addition, the waveguide port of the power amplifier is fixed at a certain angle, and the antenna can only be fixed in one polarization direction. When the polarization is rotated, the power amplifier is rotated together, which is very inconvenient to use.

[0006] Therefore, it is necessary to use a new technical means to realize the high-frequency horn transmitting antenna height and polarization adjustable while the transmission loss is also relatively low. Practical new type content

[0007] In order to overcome the existing deficiencies, the application provides a high-frequency radiation sensitivity horn antenna variable polarization test system, which can solve the problem of inconvenient adjustment of the existing horn antenna.

[0008] The technical scheme adopted by the application to solve the technical problem is: a high-frequency radiation sensitivity horn antenna variable polarization test system, comprising a lifting vehicle body, a cabinet is installed on the top of the lifting vehicle body, a baffle is installed on the cabinet, a detachable rotary joint clamp is installed on the baffle, a waveguide rotary joint is rotatably connected in the rotary joint clamp, and a horn antenna body connected with the cabinet is installed on the waveguide rotary joint.

[0009] In a specific embodiment, the rotary joint clamp comprises a clamp lower cover and a clamp upper cover, the clamp upper cover is connected with the clamp lower cover, and the waveguide rotary joint is inserted between the clamp lower cover and the clamp upper cover.

[0010] In a specific embodiment, the opposite surfaces of the clamp lower cover and the clamp upper cover are arc-shaped, the waveguide rotary joint is cylindrical, and is in sliding contact with the arc-shaped surfaces of the clamp lower cover and the clamp upper cover.

[0011] In a specific embodiment, a plurality of first screw holes are formed in the top of the clamp lower cover, a plurality of first screw rods are slidably penetrated through the clamp upper cover, and the plurality of first screw rods are connected with the plurality of first screw holes, respectively.

[0012] In a specific embodiment, a strip-shaped mounting groove and a plurality of long-narrow holes are formed in the baffle, the waveguide rotary joint is arranged in the strip-shaped mounting groove, a second screw rod is penetrated through each of the plurality of long-narrow holes, and the plurality of second screw rods are threadedly connected with the clamp lower cover.

[0013] In a specific embodiment, the arc-shaped surface of the clamp lower cover and the clamp upper cover are provided with anti-skid rubber pads.

[0014] In a specific embodiment, the waveguide rotary joint is provided with a through hole for the waveguide tube to pass through.

[0015] The beneficial effects of the present application are as follows: by providing the lifting vehicle body, the height of the horn antenna body can be easily adjusted, so that the transmitting antenna is aligned with the measured area to be tested and the antenna height and polarization are adjusted, the adjustment steps are simple, the operation is convenient, the transmission path from the waveguide output port of the power amplifier to the antenna is short, the loss is low, the system is stable and easy to use, the anti-vibration performance is high, and the test efficiency is greatly improved. By providing the waveguide rotary joint, the waveguide rotary joint is installed on the baffle through the rotary joint clamp, and the waveguide rotary joint drives the horn antenna body to rotate to achieve the purpose of adjusting the angle. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the main structure schematic diagram of the high-frequency radiation sensitivity horn antenna variable polarization test system provided by the embodiment of the present application;

[0017] Figure 2 is the cabinet and baffle connection structure schematic diagram of the high-frequency radiation sensitivity horn antenna variable polarization test system provided by the embodiment of the present application;

[0018] Figure 3 is the rotary joint clamp structure schematic diagram of the high-frequency radiation sensitivity horn antenna variable polarization test system provided by the embodiment of the present application;

[0019] Figure 4 is the baffle and rotary joint clamp structure schematic diagram of the high-frequency radiation sensitivity horn antenna variable polarization test system provided by the embodiment of the present application.

[0020] In the figure: 10-lifting vehicle body; 20-cabinet; 30-baffle; 310-strip-shaped mounting groove; 320-long waist-shaped hole; 330-second screw rod; 40-rotary joint clamp; 410-clamp lower cover; 420-clamp upper cover; 430-first screw hole; 440-first screw rod; 50-waveguide rotary joint; 510-through hole; 60-horn antenna body. DETAILED DESCRIPTION

[0021] The technical solution in the embodiment of the present application is to solve the problem of inconvenient adjustment of the existing horn antenna, and the general idea is as follows:

[0022] Embodiment:

[0023] Please refer to Figures 1-4The application provides a high-frequency radiation sensitivity horn antenna variable polarization test system, which comprises a lifting vehicle body 10, a cabinet 20 is installed on the top of the lifting vehicle body 10, a baffle 30 is installed on the cabinet 20, a detachable rotary joint clamp 40 is installed on the baffle 30, a waveguide rotary joint 50 is rotatably connected in the rotary joint clamp 40, a horn antenna body 60 connected with the cabinet 20 is installed on the waveguide rotary joint 50, specifically, the lifting vehicle body 10 is a hydraulic lifting vehicle with universal wheels and can be flexibly moved, so as to adjust the height of the horn antenna body 60, in addition, the cabinet 20 is used for fixing a power amplifier, and the cabinet 20 can be fixed on the lifting platform of the lifting vehicle body 10 through an existing bolt connection structure, further, the waveguide rotary joint 50 can realize a polarization rotation function of 0°-90° from the input port to the output port, so as to conveniently adjust the horn antenna body 60.

[0024] The rotary joint clamp 40 comprises a clamp lower cover 410 and a clamp upper cover 420, the clamp upper cover 420 is connected with the clamp lower cover 410, the waveguide rotary joint 50 is inserted between the clamp lower cover 410 and the clamp upper cover 420, when arranged, the clamp lower cover 410 is installed on the baffle 30, the waveguide rotary joint 50 is clamped between the clamp lower cover 410 and the clamp upper cover 420 through cooperation of the clamp lower cover 410 and the clamp upper cover 420, and the waveguide rotary joint 50 can rotate to adjust the angle of the horn antenna body 60.

[0025] Opposite surfaces of the clamp lower cover 410 and the clamp upper cover 420 are arc-shaped, the waveguide rotary joint 50 is column-shaped and in sliding contact with the arc-shaped surfaces of the clamp lower cover 410 and the clamp upper cover 420, it should be noted that the rotary joint clamp 40 and the waveguide rotary joint 50 adopt a concentric circle design.

[0026] A plurality of first screw holes 430 are formed in the top of the clamp lower cover 410, a plurality of first screw rods 440 are slidably penetrated through the clamp upper cover 420, the plurality of first screw rods 440 are connected with the plurality of first screw holes 430 respectively, when arranged, a plurality of connecting holes are formed in the clamp upper cover 420, the plurality of connecting holes correspond to the plurality of first screw holes 430 respectively, so that the first screw rods 440 are connected with the first screw holes 430 through the connecting holes, so as to adjust the clamping degree between the clamp lower cover 410 and the clamp upper cover 420, and the waveguide rotary joint 50 can rotate.

[0027] The baffle plate 30 is provided with a strip-shaped mounting groove 310 and a plurality of long waist-shaped holes 320. The waveguide rotary joint 50 is arranged in the strip-shaped mounting groove 310. The second screw rods 330 pass through the long waist-shaped holes 320. The second screw rods 330 are in threaded connection with the clamp lower cover 410. Specifically, the strip-shaped mounting groove 310 is arranged, so that the rotary joint clamp 40 has a certain movement range up, down, left and right when being fixed. The output port of the power amplifier can be conveniently aligned. Further, a plurality of second screw holes are arranged on the front surface of the clamp lower cover 410. The second screw holes correspond to the long waist-shaped holes 320, so that the second screw rods 330 pass through the long waist-shaped holes 320 and are connected with the second screw holes, thereby achieving the mounting of the clamp lower cover 410 on the baffle plate 30.

[0028] The arc-shaped surfaces of the clamp lower cover 410 and the clamp upper cover 420 are provided with anti-skid rubber pads. When the arc-shaped surfaces are provided with the anti-skid rubber pads, the anti-skid rubber pads can not only play the anti-skid fixing role, but also have a certain anti-vibration effect.

[0029] The waveguide rotary joint 50 is provided with a through hole 510 for the waveguide tube to pass through. It should be noted that the soft waveguide tube is connected with the horn antenna body 60 by passing through the through hole 510. One end of the soft waveguide tube is connected with the output port of the power amplifier. Since the waveguide rotary joint 50 is very heavy, and the lifting and moving operations are frequently required during the test, the relative displacement between the output port of the power amplifier and the waveguide rotary joint 50 will inevitably occur due to vibration. The structure of the soft waveguide can allow a certain displacement between the waveguide ports on both sides. Compared with the hard waveguide, the method can greatly relieve the additional stress between the output port of the power amplifier and the waveguide rotary joint 50 due to the vibration displacement.

[0030] When the application is used:

[0031] The lifting vehicle body 10 carrying the power amplifier cabinet 20 is moved to the front of the to-be-tested sample area to be tested, and the front and rear distances are adjusted. The height of the lifting vehicle body 10 is adjusted, so that the transmitting antenna is aligned with the irradiation area of the to-be-tested sample. Then the power amplifier radiates the electromagnetic wave of the specified frequency generated by the signal source to the to-be-tested sample through the horn antenna body 60, and monitors the field strength through the field sensor, so as to achieve the detection purpose. Further, the polarization direction of the transmitting antenna can be adjusted by rotating the waveguide rotary joint 50.

[0032] It should be noted that the specific model and specifications of the lifting vehicle body 10, the cabinet 20 and the horn antenna body 60 need to be determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in the art, and therefore will not be described in detail.

[0033] The power supply of the lift car body 10, the cabinet 20 and the horn antenna body 60 and its principle are clear to those skilled in the art, and will not be described in detail here.

[0034] Finally, it should be noted that: apparently, the above embodiments are only examples for clearly illustrating the present application, and are not limitations on the embodiments. Based on the above description, other different forms of changes or variations can also be made by those of ordinary skill in the art. Here, it is not necessary and impossible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A high-frequency radiation sensitivity horn antenna variable polarization test system, characterized in that, The utility model provides a kind of waveguide rotary joint, including lift car body (10), the machine cabinet (20) is mounted on the top of lift car body (10), the baffle (30) is mounted on the machine cabinet (20), detachable rotary joint clamp (40) is mounted on the baffle (30), waveguide rotary joint (50) is rotatably connected in the rotary joint clamp (40), waveguide rotary joint (50) is mounted on the horn antenna body (60) connected with the machine cabinet (20).

2. The variable polarization test system for high-frequency radiation-sensitive horn antennas according to claim 1, characterized in that The rotary joint clamp (40) includes a clamp lower cover (410) and a clamp upper cover (420), the clamp upper cover (420) is connected with the clamp lower cover (410), and the waveguide rotary joint (50) is inserted between the clamp lower cover (410) and the clamp upper cover (420).

3. The variable polarization test system of claim 2, wherein, The opposite surfaces of the clamp lower cover (410) and the clamp upper cover (420) are arc-shaped, the waveguide rotary joint (50) is cylindrical, and is in sliding contact with the arc surfaces of the clamp lower cover (410) and the clamp upper cover (420).

4. The variable polarization test system for high-frequency radiation-sensitive horn antennas according to claim 2, characterized in that, The clamp lower cover (410) has a plurality of first screw holes (430) on the top, the clamp upper cover (420) has a plurality of first screw rods (440) slidingly penetrating through, and the plurality of first screw rods (440) are connected with the plurality of first screw holes (430) respectively.

5. The variable polarization test system for high-frequency radiation-sensitive horn antennas according to claim 2, characterized in that, The baffle (30) has a strip-shaped mounting groove (310) and a plurality of long-narrow holes (320), the waveguide rotary joint (50) is placed in the strip-shaped mounting groove (310), the plurality of long-narrow holes (320) have second screw rods (330) penetrating through, and the plurality of second screw rods (330) are threadedly connected with the clamp lower cover (410).

6. The variable polarization test system of claim 3, wherein, The arc surfaces of the clamp lower cover (410) and the clamp upper cover (420) are provided with anti-skid rubber pads.

7. The high-frequency radiation sensitivity horn antenna variable polarization test system according to claim 1, wherein, The waveguide rotary joint (50) has a through hole (510) for a waveguide tube to penetrate through.

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