MICROSTRIP PARALLEL-LINE COUPLER TO PERFORM BROADBAND OPTICALLY CONTROLLED PHASE-SHIFTING

摘要

This paper presents an optically controlled broadband phase-shifter using a parallel-line coupler, that takes advantage of high-resistivity silicon photo-absorption at 840 nm. A continuously variable phase-shifting of 120° is achieved at 11 GHz with Δ|S{sub}21| < 5 dB and with |S{sub}11| < -15 dB in a large frequency band (6-15 GHz).