Broadband adjustable attenuator circuit and method based on GaAs technology

Abstract

The embodiment of the invention discloses a broadband adjustable attenuator circuit and method based on a GaAs technology. The broadband adjustable attenuator circuit comprises a 0dB attenuation unit, a 0.5 dB attenuation unit, a 1dB attenuation unit and a 2dB attenuation unit. The 0dB attenuation unit is used for direct connection of input signal power and outputting signals equal to the input power. The 0.5 dB attenuation unit is used for attenuating 0.5 dB power of an input signal and outputting a signal attenuated by the 0.5 dB power; the 1dB attenuation unit is used for attenuating the 1dB power of an input signal and outputting a signal attenuated with the 1dB power; the 2dB attenuation unit is used for attenuating the 2dB power of an input signal and outputting a signal with the attenuated 2dB power; and the 0dB attenuation unit, the 0.5 dB attenuation unit, the 1dB attenuation unit and the 2dB attenuation unit are configured to be connected in a gold wire bonding mode so as to achieve one of eight attenuation states.

Description

technical field [0001] The invention relates to the field of transceiver system chips. More specifically, it relates to a broadband adjustable attenuator circuit and method based on GaAs technology. Background technique [0002] With the development of phased array radar technology, monolithic microwave integrated circuits are also developing continuously. Among them, the chips in the transceiver channel are widely used in radar systems and are the key components of radar systems. [0003] The adjustable attenuator circuit is mainly used in the transceiver channel of the phased array radar system. It is suitable for the gain consistency adjustment between multiple channels in the micro-assembly process, providing accurate attenuation value and realizing the amplitude adjustment of the input signal and output signal. After it is sent to the next-level circuit, the two ends of the attenuator are directly connected to other chips, and 50 ohm impedance matching needs to be achi...

AI Technical Summary

Problems solved by technology

[0003] The adjustable attenuator circuit is mainly used in the transceiver channel of the phased array radar system. It is suitable for the gain consistency adjustment between multiple channels in the micro-assembly process, providing accurate attenuation value and realizing the amplitude adjustment of the input signal, and the output signal After that, it is sent to the next-level circuit. Both ends of the attenuator are directly connected to other chips, and 50 ohm impedance matching is required. The disadvantage of the attenuator circuit used in most products at present is that the attenuation value is fixed too single; it is not easy to adjust the attenuation value ;Requires switch control to achieve adjustable attenuation, additional control circuit increases the cost

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