X wave band T/R assembly with switchable output power

Abstract

According to an X wave band T / R assembly with switchable output power provided by the present invention, a receiving channel and a transmitting channel share a multifunctional chip, the six-phase shift and attenuation functions are achieved, and the amplification function of input signals is achieved; a transmitting channel can provide a large output power path and a small output power path, and the channel selection and switching is conducted through the control signals; a power amplifier is connected with a multifunctional chip and is used for amplifying the output power of the multifunctional chip so as to output an amplified signal with target power; the different amplification channels are selected by the control signal to perform the power amplification, and finally, the output signals with two different powers can be respectively generated; the amplitude-limiting low-noise amplifier chip is used for detecting and amplifying a signal outputted by the ring isolator in the receiving channel; a partition plate and a cover plate are arranged on a box body, and the partition plate is arranged between the driving amplifier and the power amplifier, so that the self-excitation caused by the mutual influence between the power amplifier devices is prevented, and the reliability of the T / R assembly is reduced. The cover plate is used for preventing the signal leakage and guaranteeing the stability of the microwave signals in a cavity.

Description

technical field [0001] The invention relates to an X-band T / R component with switchable output power. Background technique [0002] In the antenna array of phased array radar, T / R components are often required to provide output power of thousands of channels for antenna synthesis. Usually low-power continuous wave signals are used for irradiation, and high-power pulse signals are used for target tracking. In theory, two sets of antenna arrays are required. The airborne phased array has certain requirements for the volume and weight of the front, and it is an ideal solution to integrate high power and low power into the same front. For T / R components, the most direct solution is to directly back off the power of the power amplifier chip through a 6-bit digitally controlled attenuator. However, within the entire X-band bandwidth, the linear gain fluctuation of the power amplifier chip is typically ±2dB, and the linear power of the power amplifier is The output also has the s...

AI Technical Summary

Problems solved by technology

For T / R components, the most direct solution is to directly back off the power of the power amplifier chip through a 6-bit digitally controlled attenuator. However, within the entire X-band bandwidth, the linear gain fluctuation of the power amplifier chip is typically ±2dB, and the linear power of the power amplifier is The output also has the same ups and downs, which cannot meet the requirements; at the same time, the power amplifier is in the linear working area, the efficiency is extremely low, and the power consumption is basically static power consumption, which is more than twice the average power consumption under pulse work, which cannot meet the requirements

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