Broadband single-pole single-throw switch and broadband single-pole multi-throw switch based on transformer

Abstract

The invention belongs to the technical field of electronic switches, and particularly relates to a broadband single-pole single-throw switch and a broadband single-pole multi-throw switch based on a transformer. The single-pole single-throw switch comprises a first switch transistor and a second switch transistor, wherein a small on-resistance is presented when the first switch transistor and thesecond switch transistor are conducted, and a turn-off capacitor is presented when the first switch transistor and the second switch transistor are turned off; the transformer and the turn-off capacitor jointly form a broadband impedance matching network when the two switch transistors are turned off; and the quarter-wave transmission line is used for converting the small on-resistance when the second switch transistor is conducted into high real impedance. According to the invention, the broadband single-pole single-throw switch can be realized, the single-pole single-throw switch is turned off when the two switch transistors are turned on, and the single-pole single-throw switch is turned on when the two switch transistors are turned off; the single-pole single-throw switches are connected in parallel to form a single-pole multi-throw switch; when the broadband single-pole single-throw switch and the broadband single-pole multi-throw switch are conducted, the broadband single-pole single-throw switch and the broadband single-pole multi-throw switch have relatively wide radio frequency bandwidth and also have the functions of direct current isolation and broadband matching.

Description

technical field [0001] The invention belongs to the technical field of electronic switches, and in particular relates to a single-pole single-throw switch and a single-pole multi-throw switch. Background technique [0002] In a mobile communication system, in order to save cost and control area, the power amplifier and the low noise amplifier of the radio frequency front-end usually share the same antenna, and the gate control is controlled by switching. In recent years, people's requirements for wireless communication speed have been continuously improved. According to Shannon's theorem, under the same signal-to-noise ratio, the transmission speed of a wireless communication system is proportional to the system bandwidth. Therefore, broadband millimeter-wave communication systems have become a research hotspot. The low-pass switches based on gallium arsenide or CMOS technology commonly used in current microwave communication systems generally can only cover the current fre...

AI Technical Summary

Problems solved by technology

The low-pass switches based on gallium arsenide or CMOS technology commonly used in current microwave communication systems generally can only cover the current frequency range, that is, 0-6GHz, and it is difficult to reach the millimeter wave frequency band, which cannot meet the needs of broadband millimeter wave communication systems.

Images