A Full-duplex Bidirectional Amplifier with Low DCPower Consumption Using Tunnel Diodes
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A low-power, switchless, full-duplex bidirectionalamplifier operating in the 915 MHz (ISM band) is proposed.It is composed of two identical reflection amplifiers and one90◦,−3dB Branch Line Coupler (BLC). The reflection ampli-fiers are designed using low DC power consumption tunnel diodesand provide a measured reflection gain of 13 dB with consumedpower of only 178μW for -30 dBm of incident signal power. Thesereflection amplifiers are integrated with a miniaturized BLC toform a bidirectional amplifier that provides 9 dB of measuredtransmission gain and 22 dB of measured return loss.
CitationKhaledian, S., Farzami, F., Erricolo, D., & Smida, B. (2017). A Full-duplex Bidirectional Amplifier with Low DCPower Consumption Using Tunnel Diodes. IEEE Microwave and Wireless Components Letters, 27(12), 1125-1127. doi:10.1109/LMWC.2017.2754341
retro-directive antenna arrays