Voltage controlled duplexer-integrated leaky-wave antenna using Magnet-less Non-reciprocal Metamaterial (MNM)

A novel voltage controlled duplexer-integrated leaky-wave antenna, consisting of an array of traveling-wave resonant particle by metal ring resonator with variable capacitance and uni-lateral component is proposed, analysed, and measured. In contrast to ferrite-based leaky-wave antenna, this antenna does not require a biasing magnet but only an bias voltage for the FETs, and beam steering voltage for varactor diodes. Bias voltage beam steering in addition to unique duplexer operation is confirmed numerically and experimentally. As a result, beam scanning property from −30° to 45° is realized for 7 GHz operation. One non-conventional property of this antenna is non-reciprocity, and duplexer integrated operation is also confirmed just in one antenna element by utilizing non-reciprocity.