A novel Broadband-Wide Phase Range digital phase shifter topology

In this work, a novel “Broadband-Wide Phase Range” and compact digital phase shifter topology is proposed based on the modified symmetrical lattice structures. The generic topology is suitable for MMIC implementation. The concept proof is exhibited on silicon substrate utilizing the 0.18 μm TSMC CMOS process. It is shown that proposed architecture results in feasible 45°, 90° and 180° phase shifting cells over combined C and X bands with less than 3 dB loss.