Passive Phased Array Radar Excitation Module

Abstract

A novel passive phased array radar excitation module proposed by the present invention comprises a DSP digital signal processing chip running a wave control code calculation program module and an excitation pulse width generation program module and multiple field effect tubes. Between the DSP digital signal processing chip and the field effect transistors with the same number of phase shifters in the sub-array, there are correspondingly connected the isolated output terminal strong electric signal and the DSP digital signal processing chip weak electric signal, and at least one component time multiplexed Reset / set pulse width signal separated level shifting chip set, the above level shifting chip set boosts the excitation pulse width signal voltage generated by the DSP digital signal processing chip, isolates and separates the signal, and then transmits it to the field effect tube. The field effect tube amplifies the above-mentioned pulse width signal into a pulse width current, and loads it on the excitation coil of the phase shifter. The invention utilizes a pulse width generation program of a digital signal processing chip to generate excitation signals equal to the number of phase shifters, thereby reducing the volume, power consumption and cost of sub-antenna array design.

Description

Passive Phased Array Radar Excitation Module technical field The invention relates to an excitation module circuit system for controlling the phase shifter of an antenna array element in a passive phased array radar, using an electronic computer to control the phase shifter, and exciting the antenna array element to change the phase distribution of the phase shifter on the antenna aperture to realize beam electronic scanning. Background technique The phased array antenna consists of thousands of antenna radiating elements arranged in a certain way. Active components or passive phase shifters are connected between each radiating unit and the feeding network. And use the computer to control the phase shifter array of the antenna array according to a certain program, change the phase distribution of the phase shifter array on the array, and make the beam scan in space according to a certain rule. In other words, phased array radar uses a phase shifter to change the phase rel...

AI Technical Summary

Problems solved by technology

In this way, the production and debugging cost, cycle and power consumption of the whole antenna increase sharply.

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