A high isolation switch module

Abstract

The invention discloses a high-isolation switch module, and specifically relates to the technical field of radio frequency switches. It solves the deficiency that the existing multi-stage radio frequency switches are connected in series and affect the performance of the switch isolation. The high-isolation switch module includes a main isolation unit, one end of the main isolation unit is provided with a signal input port, and the other end is connected to a plurality of switch lines, each switch line includes a plurality of cascaded isolation units, each switch line The last isolation unit is connected with a signal output port, and the adjacent isolation units are connected by a strip line; each isolation unit contains a radio frequency switch and a shielding wall, the radio frequency switch is a single-pole double-throw switch, and the shielding wall adopts microwave multilayer There are shielding holes evenly distributed on the shielding wall, and the shielding holes are "m-shaped" shielding holes. There is a metal shielding shell on the shielding wall, and the isolation of each switch line is 130dB in the frequency range of 100kHz‑8.5GHz.

Description

technical field [0001] The invention belongs to the technical field of radio frequency switches, and in particular relates to a high isolation switch module. Background technique [0002] The radio frequency switch is a key component of microwave communication and other electronic systems to achieve high performance. The key performance of many electronic products depends on the performance of the switch, which directly affects the stability and reliability of the system. RF switches have the characteristics of low insertion loss, high isolation, and high reliability. Isolation is the most important index of radio frequency switch, this index directly determines the performance of the switch and the circuit controlled by the switch. At present, the isolation of integrated switches is generally about 40dB in the frequency range of 100kHz-8.5GHz. There will be space radiation in series connection of multi-stage RF switches, which will affect the performance of switch isolatio...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of the performance of the existing multi-stage radio frequency switch in series that affects the isolation of the switch, and proposes a high isolation that solves the problem of space radiation affecting the isolation performance by cascading the switches at all levels. switch module

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