Frequency conversion antenna near field frequency sweeping testing system and testing method thereof

A technology of frequency sweep test and radio frequency test, which is applied in the direction of transmission system, electrical components, transmitter monitoring, etc., can solve the problems that cannot be realized, and there is no fast near-field test system with variable frequency antenna, so as to improve test accuracy, improve test efficiency, Configure simple effects

Active Publication Date: 2016-04-20
XIAN INSTITUE OF SPACE RADIO TECH
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Using traditional antenna plane near-field test methods, it is impossible to achieve
[0003] Through research, it is known that no domestic unit has conducted near-field frequ

Method used

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  • Frequency conversion antenna near field frequency sweeping testing system and testing method thereof

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0035]The frequency-variable antenna near-field sweep test system and testing method provided by the present invention are used for testing the plane near-field amplitude and phase distribution of the frequency-variable antenna.

[0036] (1) Test system

[0037] Such as figure 1 As shown in the system composition block diagram, the frequency-variable antenna near-field sweep test system of the present invention includes a test signal source, a coupling module, a test channel, a reference channel, a receiver and a control computer.

[0038] (1), test signal source

[0039] In the present invention, the test signal source generates frequency f RF The CW signal is used as the RF test signal. The signal source sends the generated radio frequency test signal to the coupling module after receiving the trigger signal sent by the receiver, and forwa...

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Abstract

The invention provides a frequency conversion antenna near field frequency sweeping testing system and a testing method thereof. The system comprises a testing signal source, a coupling module, a testing channel, a reference channel, a receiver and a controlling computer. The testing channel comprises a transmitting module, a to-be-tested frequency conversion antenna, a second frequency mixing module and a third frequency mixing module. The second frequency mixing module in the testing channel performs frequency conversion on multiple frequency point signals output by the to-be-tested frequency conversion antenna; local signals of the second frequency mixing module are selected in sequence according to a predetermined frequency list, and the frequency of the local signal is changed when a trigger signal is received each time, so that time shared test of the output signal of each frequency point antenna is realized; and each time the frequency of an output signal of one frequency point is converted into the frequency band of a radio frequency transmitting signal, then the local signal the same as a reference module is adopted for down conversion so as to obtain a middle frequency reference signal and a middle frequency testing signal for phase comparison and amplitude comparison. Through adoption of the method, phases of link signals can be guaranteed to be consistent, the plane near field rapid frequency sweeping testing function of the frequency conversion antenna is realized, and the test efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of antenna testing, in particular to a near-field frequency sweep testing system and a testing method for frequency-variable antennas. Background technique [0002] With the development of aerospace technologies such as mobile communication satellites, the requirements for the function and performance of the antenna are getting higher and higher. Antenna testing technology can no longer meet the requirements of satellite antenna testing. A variable-frequency multi-beam antenna has an effective antenna diameter of more than 10 meters, forming hundreds of national land point beams to cover the national land, and frequency reuse. During the test, the entrance frequency of the antenna is inconsistent with the frequency radiated into the space. It cannot be realized by using the traditional antenna plane near-field test method. [0003] Through investigation, it is known that no unit in China has conducted near...

Claims

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Application Information

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IPC IPC(8): H04B17/12H04B17/24H04B1/00H04B1/52
CPCH04B1/0096H04B1/52
Inventor 刘灵鸽马玉丰焦婧赵兵张启涛崔雷
Owner XIAN INSTITUE OF SPACE RADIO TECH
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