Design of LTCC package for DGS LPF switch

This paper presents the design of LTCC-based packages for CMOS-based defected ground structure (DGS) low pass filter (LPF) single-pole single-throw (SPST) and single-pole double-throw (SPDT) switches. The packaged SPST switch can operate from DC to 20 GHz with an insertion loss less than 1 dB, return loss large than 10 dB, and isolation larger than 15 dB. The packaged SPDT switch can operate from DC to 16 GHz with an insertion loss less than 2 dB, return loss large than 15 dB, and isolation larger than 30 dB.