公开(公告)号：US20220006483A1

公开(公告)日：2022-01-06

申请号：US17292590

申请日：2020-02-05

Applicant: COMMSCOPE ITALY S.R.L.

Inventor： Corrado Luigi SCACCABAROZZI

IPC: H04B1/48 ,  H04B1/52

Abstract: TX/RX switch circuits include an input, a first circulator having a first port coupled to the input, a circuit element having a first port coupled to a second port of the first circulator, a second circulator having a first port coupled to a second port of the circuit element, an output coupled to a second port of the second circulator, a low noise amplifier coupled between a third port of the second circulator and a third port of the first circulator, a bias circuit that is configured to set an impedance at a third port of the circuit element at a first impedance level when operating in transmit mode and to set the impedance at the third port of the circuit element to have a second impedance level when operating in receive mode, and a first PIN diode coupled between an output of the low noise amplifier and electrical ground.