Double-pole double-throw radiofrequency switch

Abstract

The invention provides a double-pole double-throw radiofrequency switch. The double-pole double-throw radiofrequency switch is characterized in that a first arm (A1) is connected between a first radiofrequency end (RF1) and a first antenna end (ANT1); a second arm (A2) is connected between the first antenna end (ANT1) and a second radiofrequency end (RF2); a third arm (A3) is connected between thesecond radiofrequency end (RF2) and a second antenna end (ANT2); a fourth arm (A4) is connected between the second antenna end (ANT2) and the first radiofrequency end (RF1); a first inductor (L1) anda second inductor (L2) are connected in series between the first antenna end (ANT1) and the second antenna end (ANT2); the first to fourth arms (A1-A4) have completely the same structure; each arm comprises two capacitors and a switch device; and the switch devices are connected in series between the two capacitors. Compared with the prior art, the double-pole double-throw radiofrequency switch has the advantages of low insertion loss, high isolation performance and smaller device size.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a double-pole double-throw radio frequency switch. Background technique [0002] With the in-depth development of modern communication technology, communication equipment is developing towards miniaturization and low energy consumption, which requires each component in communication equipment to adopt a miniaturized design, try to control the size and thickness of the device, and at the same time minimize the number of components and Component power consumption. [0003] The RF signal input and output module can mainly realize the functions of low-noise amplification of the received RF signal and power amplification of the transmitted RF signal. It is an indispensable part of the RF communication equipment. Signal flow control and other functions. In the current microwave communication system, the power switch usually adopts several forms: (1) using a discrete silicon PIN dio...

AI Technical Summary

Problems solved by technology

However, since any path must pass through two switching devices, the disadvantage of this structure is that the insertion loss is large, and the isolation between each port is not ideal, and the applicability of the device is limited.

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