Abstract
Normally, most researches on phase calibration of shipborne USB system focus on the means of phase calibration. This article starts with the research on the channel of the system. The composition of the channel is introduced, and the characteristics of the channel is analyzed. Taking the channel of the field effect amplifier front-end as the research object, a mathematical fitting algorithm is used to derive the functional relationship between the phase of the field effect amplifier front-end and the working frequency. The actual calibration data is used for simulation analysis to obtain the fitting order of the function. Combining the phase-frequency relationship of the field effect amplifier front-end and the microwave self-checking phase correction of the field effect amplifier back-end, a new phase calibration method is proposed.
Highlights
IntroductionThere are many advantages in the tracking receiver of the system[1] ,such as relatively simple structure, high tracking accuracy, excellent angular error demodulation performance, and easy implementation
The shipborne USB system uses a dual-channel monopulse program
The sum and difference signals pass through the waveguide, field effect amplifier and switch, down-converter, slip ring, intermediate frequency level adjustment, switch matrix, until the tracking receiver performs angular error demodulation
Summary
There are many advantages in the tracking receiver of the system[1] ,such as relatively simple structure, high tracking accuracy, excellent angular error demodulation performance, and easy implementation. It is widely used in precise tracking and measuring radars, and it is a program used most in the tracking and controlling system currently.[2] The phase calibration module of the tracking receiver obtains the phase value and slope of both azimuth and pitch through angle calibration, which is used to demodulate the angle error during tracking[3] to realize tracking the target automatically.
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