An x-band digital phased array distributed sub-array t/r component feed circuit

Abstract

The invention relates to an X-band digital phased array distributed sub-array T / R component feed circuit, which belongs to the field of microwave technology. It includes a double-sided printed board and a microstrip line. There are multiple ports A on the front of the double-sided printed board, and multiple ports B on the back; the port A is connected to the antenna unit through multiple microstrip lines, and the port B is connected to the antenna unit through multiple A microstrip line is connected to the T / R component; the length of the microstrip line is equal, the difference loss is not greater than 0.2dB, the isolation is not less than 47dB, and the phase difference is less than 2°; the voltage standing wave ratio of port A and port B is not greater than 1.15; There are 112 ports A and B respectively; there are 112 microstrip lines, each with a length of 43.6 mm. Ensure that the delay time of each feeder is the same, the difference loss is small, the isolation degree and impedance matching degree are high, and the occupied space is small. It solves the problems that there is a non-fixed phase difference between the corresponding signals of the existing antenna unit or the T / R component, the beam cannot realize stable interference, and the problems of large transmission loss and large space occupation.

Description

technical field [0001] The invention relates to an X-band digital phased array distributed sub-array T / R component feed circuit, which belongs to the field of microwave technology. Background technique [0002] The digital phased array distributed T / R component of the radar integrates 112 digital array units into a sub-array module, and the phased array is composed of sub-array modules according to performance requirements. The subarray module has a compact structure, dense feeding ports, and the spacing is smaller than the antenna element spacing, so that the distance between the subarray module ports and the corresponding antenna elements is not equal, and the same phase cannot be obtained. In addition, because there are many feeders and coaxial cables are usually used, not only does it take up a lot of space, but the isolation between feeders is low and it is difficult to prevent mutual interference. Therefore, in order to ensure the electrical performance of the radio f...

AI Technical Summary

Problems solved by technology

The subarray module has a compact structure, dense feeding ports, and the spacing is smaller than the antenna element spacing, so that the distance between the subarray module ports and the corresponding antenna elements is not equal, and the same phase cannot be obtained

In addition, because there are many feeders and coaxial cables are usually used, not only does it take up a lot of space, but also the isolation between feeders is low and it is difficult to prevent mutual interference

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