Novel X-band all-solid-state transmitter

Abstract

The invention discloses a novel X-band all-solid-state transmitter, relates to the technical field of microwave measurement. The transmitter comprises a feed network, two-stage GaAs power amplifiers,a first amplification module, a microstrip isolator, a first microstrip coupler, a first coaxial waveguide converter, a second amplification module, a waveguide bi-directional probe coupler and a waveguide ring / isolator, wherein the two-stage GaAs power amplifiers, the first amplification module, the microstrip isolator, the first microstrip coupler, the first coaxial waveguide converter, the second amplification module, the waveguide bi-directional probe coupler and the waveguide ring / isolator are connected in sequence. The input end of the first-stage GaAs power amplifier serves as the inputend of the all-solid-state transmitter to be connected with radio frequency signals, and the output end of the waveguide ring / isolator serves as the output end of the all-solid-state transmitter to be connected with an antenna port. The feed network is used for supplying power to the two-stage GaAs power amplifier, the first amplification module and the second amplification module; micro radio-frequency signals input to the all-solid-state transmitter are amplified by four stages of the two-stage GaAs power amplifier, the first amplification module and the second amplification module to output high-power radio-frequency signals, and the high-power device is ensured to have better power synthesis efficiency through two groups of power distributors / synthesizers.

Description

technical field [0001] The invention relates to the technical field of microwave measurement, in particular to a novel X-band all-solid-state transmitter. Background technique [0002] Compared with electric vacuum power amplifiers, microwave solid-state amplifiers have significant advantages: high reliability and long life. The power supply voltage used by the amplifier is generally lower than 50V, the operation is very safe, the volume is small, and the structure is simple. Therefore, it is favored by more radar transmitter developers and users. [0003] my country started the development of all-solid-state radar transmitters in the early 1970s. After nearly 50 years of hard work, a variety of all-solid-state radar transmitters have been put into use. At present, the working frequency is in the S-band and below, and the all-solid-state radar transmitter has gradually occupied a dominant position, and its design technology has become mature. However, at the high end of t...

AI Technical Summary

Problems solved by technology

In the past, the power tubes used in domestic X-band solid-state power amplifiers were mainly GaAs FET power tubes, and the design technology of high-power amplifiers was mainly GaAs FET amplifier design technology and power synthesis design technology, but limited by the working voltage of GaAs FET power tubes, the output The power level is relatively low. At the same time, affected by the technology level and cost, the research on domestic high-power solid-state transmitters lags far behind foreign countries. Solid-state amplifiers are only partially used in active phased array radars and as a driving force for electric vacuum transmitters. level, traditional high-power solid-state transmitters are large in size, low in efficiency, complex in circuit structure, and relatively low in output capability

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