Compact RF front-end configuration for short-range communication

Abstract

A compact radio frequency front-end configuration for short-range wireless communication with a novel bidirectional amplifier is presented. This configuration uses a single RF path for both transmitting and receiving. Performance prediction based on the experimental results indicates that the proposed RF front-end has the potential for use in short-range wireless applications.

Switchless bidirectional amplifier for wireless communication systems

“…There, bidirectional amplifiers realized as monolithic microwave integrated circuits (MMIC) bias a transistor circuit in such a way that it amplifies either in the one or the other direction. Full-duplex bidirectional amplifiers are presented for instance in [5][6][7][8]. In [5] a transistorized-directional coupler and in [6] a microstriplinedirectional coupler is used to combine two amplifiers for fullduplex applications.…”

“…Full-duplex bidirectional amplifiers are presented for instance in [5][6][7][8]. In [5] a transistorized-directional coupler and in [6] a microstriplinedirectional coupler is used to combine two amplifiers for fullduplex applications. However, a transistorized-directional coupler shows a high noise and can handle only low power, and microstripline-directional couplers become too big for some applications.…”