MEMS switchable interdigital coplanar filter
MEMS switchable interdigital coplanar filter
Résumé
This paper presents a tunable interdigital coplanar
filter with tapped-line feedings. Microelectromechanical systems capacitors are used as a high contrast capacitive switch between
a quarter-wavelength resonator and an open-ended stub to per-form the frequency shift. A two-pole tunable filter with a 13% relative bandwidth has been designed, fabricated, and measured. The center frequency can be switched from 18.5 to 21.05 GHz with low return losses (less than 15 dB) and low insertion losses (3.5 dB).
This paper presents a tunable interdigital coplanar
filter with tapped-line feedings. Microelectromechanical systems capacitors are used as a high contrast capacitive switch between
a quarter-wavelength resonator and an open-ended stub to per-form the frequency shift. A two-pole tunable filter with a 13% relative bandwidth has been designed, fabricated, and measured. The center frequency can be switched from 18.5 to 21.05 GHz with low return losses (less than 15 dB) and low insertion losses (3.5 dB).