Input-output characteristic automatic testing method of travelling wave tube with pre-stage amplifier

A traveling wave tube and input terminal technology, which is applied in the field of automatic testing of input and output characteristics of traveling wave tubes, can solve problems such as limitations, and achieve the effects of being simple and convenient to use, improving work efficiency, and improving test accuracy and efficiency.

Inactive Publication Date: 2017-04-05
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

This shortcoming has caused the existing automatic test system to be greatly limited in the actual testing of the input and output characteristics of the traveling wave tube. The i

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  • Input-output characteristic automatic testing method of travelling wave tube with pre-stage amplifier
  • Input-output characteristic automatic testing method of travelling wave tube with pre-stage amplifier
  • Input-output characteristic automatic testing method of travelling wave tube with pre-stage amplifier

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Embodiment Construction

[0027] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the examples are for reference and illustration only, and do not constitute a limitation to the protection scope of the present invention.

[0028] This embodiment provides an automatic test method for the input and output characteristics of a traveling wave tube with a preamplifier, which uses a test system such as figure 2 As shown: two instruments are mainly used in the system: the signal source with GPIB / LAN interface and the dual-channel power meter; in order to ensure the measurement quality, the harmonic component of the signal source should be small; the power head and high-power load used by the power meter There must be good matching performance; the directional coupler must have flat coupling, high directivity and good port matching; depending on the traveling wave tube to be tested, the operating frequency ...

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Abstract

The invention belongs to the microwave test technical field, and specifically provides an input-output characteristic automatic testing method of a travelling wave tube with a pre-stage amplifier; a feedback mechanism is added on the output end (input end of a measured travelling wave tube) of the pre-stage amplifier, thus ensuring the input power of the travelling wave tube to be valid, and obtaining the correct travelling wave tube input-output characteristic testing result; the method can automatically test the travelling wave tube input-output characteristics; a travelling wave tube working linear region and a gradual saturation process can be directly viewed in real time on a computer in a testing process; special parameters can be parsed from the test data, like a saturation point, a 1dB compression point and small signal gain, and the data can be stored for other purposes, thus greatly improving testing accuracy and efficiency.

Description

technical field [0001] The invention belongs to the technical field of microwave testing, in particular to an automatic testing method for input and output characteristics of a traveling wave tube with a preamplifier. Background technique [0002] Traveling wave tube is an important electric vacuum device, which has been widely used in the fields of electronic countermeasures, radar and satellite communication. Power is the most basic parameter of the traveling wave tube. The research on the input and output characteristics of the traveling wave tube shows that when the input power of the traveling wave tube is small, the relationship between the output power and the input power is linear, or the traveling wave tube works in the linear region . At the high end of the linear region, when the input power is further increased, the output power still increases with the increase of the input power, but the increase speed becomes slower, and the output power and the input power a...

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Application Information

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IPC IPC(8): G01R31/25
CPCG01R31/25
Inventor 黄桃周小社宫大鹏李斌
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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