A Triple Channel High Rejection RF MEMS Switched Filter Bank

• DOI: 10.4028/www.scientific.net/kem.483.132
• Publication Date: 2011-07-04T15:30:23Z
• Authors: Yuan Wei Yu; J. Zhu; Yi Shi; Jian Yu
• Keywords: Stopband; Chassis; Fractional bandwidth; Switched capacitor; Passband

This paper presents a bandpass switchable filter for 6–11GHz applications which is housed in machined aluminum chassis. The circuit consists of three fixed interdigital microstrip filters and two single-pole triple-throw (SP3T) microelectromechanical systems (MEMS) switching networks achieved by the individual series-shunt MEMS switch chips. A tuning range 36.6% was from 6.7 to 9.7 GHz with fractional bandwidth 21.1±2.7%, low mid-band insertion loss ranging 2.6 dB 3.0 dB. Rejection below -50 most cases skirt slopes are more than 50 dB/GHz at both lower higher stopband.