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1. (WO2018128782) LOSSLESS SWITCH FOR RADIO FREQUENCY FRONT-END MODULE

Pub. No.:    WO/2018/128782    International Application No.:    PCT/US2017/066899
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Mon Dec 18 00:59:59 CET 2017
IPC: H04B 1/44
H03F 1/02
H03F 3/00
H04B 1/00
H04B 1/38
H04B 1/40
Applicants: COOLSTAR TECHNOLOGY, INC.
Inventors: XU, Shuming
Title: LOSSLESS SWITCH FOR RADIO FREQUENCY FRONT-END MODULE
Abstract:
An integrated front-end module (FEM) includes at least one power amplifier (PA) coupled to an antenna without inclusion of a switching element in a transmit signal path in the FEM between an output of the PA and the antenna. The FEM further includes at least one low-noise amplifier (LNA) and a switching circuit coupled in a receive signal path of the FEM between the antenna and an input of the LNA. The switching circuit is configured in a first mode to disable the PA and to connect the input of the LNA to the antenna for receiving signals from the antenna. The switching circuit is configured in a second mode to disconnect the input of the LNA from the antenna and to enable the PA for transmitting signals to the antenna.