ABSTRACT
This chapter discusses simple method of designing a multifrequency phase shifter bank. It explores design, development and measurement of a wideband 4-bit microelectromechanical systems (MEMS) phase shifter bank are presented using two single-pole four-throw (SP4T) switches and four distributed MEMS transmission line (DMTL) structures. Radio frequency (RF) MEMS-based phase shifters are suitable components for system-on-chip in modern RF systems that demand reconfigurable operation at different frequencies over different frequency bands. A multiband phase shifter is one of the strongest and state-of-the-art candidates for wideband multifrequency systems. All individual functional building blocks like SPST and SP4T switches, high isolation SP4T switches and four individual DMTL phase shifters are designed, fabricated and tested separately to ensure their optimum performance over the bandwidth. The complete phase shifter demonstrates measured average insertion of 6 dB, average return loss of 10 dB and maximum average phase error of 3.8° up to 60 GHz.
