Electrically tunable amplitude equalizer with novel topological structure

Abstract

The invention provides an electrically tunable amplitude equalizer with a novel topological structure. The electrically tunable amplitude equalizer comprises an input 90-degree bridge, fixed amplitudeequalizers with different equalization quantities, electrically tunable attenuators corresponding to the different fixed amplitude equalizers, and an output 90-degree bridge. The attenuation quantities of the electrically tunable attenuators corresponding to the different fixed amplitude equalizers to be in different combination states to obtain signals with different equalization quantities anddifferent attenuation quantities, and unequal amplitude power synthesis is performed on the signals with different combination states through outputting a 90-degree bridge to realize an electric tuning function of the equalization quantities. The design thought of the electrically tunable amplitude equalizer is changed, the realization of the electrically tunable function is transferred from the interior of the amplitude equalizer circuit to a mature and simple electrically tunable attenuator, the design difficulty of the electrically tunable amplitude equalizer is greatly reduced, and variousperformances are improved. The problems that an existing fixed amplitude equalizer cannot be tuned, and an existing electric tuning amplitude equalizer is poor in equalization linearity, large in insertion loss change, poor in standing wave characteristic and low in input 1dB compression point in the electric tuning process are solved.

Description

technical field [0001] The invention relates to a novel topology electric amplitude equalizer, which belongs to the technical field of microwave circuits. Background technique [0002] Gain flatness is an important index for spaceborne microwave receivers and spaceborne linearizers. Microwave components and MMICs (Microwave Monolithic Integrated Circuits) are the basic units for implementing spaceborne microwave receivers and spaceborne linearizers, and generally have different gain flatness characteristics. The cumulative effect of the cascaded gain flatness of different microwave components and different MMICs will lead to the deterioration of the gain flatness of the spaceborne microwave receiver and spaceborne linearizer, and the impedance mismatch of the interconnection circuit between the microwave component and the MMIC will also increase. It will deteriorate the gain flatness after cascading. Because the amplitude equalizer can effectively improve the gain flatness...

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, and to propose a new topology electric amplitude equalizer using unequal-amplitude power synthesis, focusing on solving the existing space-borne microwave receiver, space-borne linearization Among them, the fixed-amplitude equalizer is not adjustable, and the electric-adjustable amplitude equalizer equalizes the problems of poor linearity, large insertion loss changes, poor standing wave characteristics, and low input 1dB compression point during the electric adjustment process.

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