Filtering-integration single-pole double-throw switch and microstrip-line filtering-integration single-pole double-throw switch

Abstract

The invention relates to a filtering-integration single-pole double-throw switch and a microstrip-line filtering-integration single-pole double-throw switch. A parallel LC resonance circuit, which does not load a switch circuit, of a common stage and two sets of parallel LC resonance circuits, which load switch circuits, of an intermediate stage are connected with parallel LC resonance circuits of a last stage through four coupling capacitors to form two signal circulation paths; and under control of direct-current bias voltage of the same absolute value and opposite polarity, the one signal circulation path shows a low-loss and high-selectivity band-pass filtering characteristic, and the other signal circulation path shows a high-suppression stopband characteristic in a wider frequency range, and thus a filtering-integration single-pole double-throw switch function is formed. The switches have the advantages that: two component functions of the switches and a filter are fused; a circuit is simple and compact in size; a conduction state has a steep broadband band-pass filtering characteristic; a cut-off state has a high-suppression full-resistance characteristic; high isolation is provided between ports, and a higher suppression function is provided for harmonics in the wider frequency range.

Description

technical field [0001] The invention belongs to the technology of switches and filters, and relates to a filtering integrated single-pole double-throw switch and a microstrip line filtering integrated single-pole double-throw switch. Background technique [0002] The switch is one of the key components of the RF front-end of systems such as time-division multiplexing, switch beamforming arrays, and multiple input and output. It is used to realize the sharing of an antenna for the transceiver channel and reduce the size and redundancy of the RF front-end. Switches are also key components of digitally controlled phase shifters, digitally controlled attenuators, etc. The traditional switch design mainly focuses on solving problems such as operating frequency and bandwidth, insertion loss, isolation, port impedance matching, power capacity, switching speed, switch life, and circuit size. The commonly used implementation methods mainly include mechanical switches, ferrite Body s...

AI Technical Summary

Problems solved by technology

This design method not only increases the circuit area and signal trans

Images