Title :
2.0-2.7 GHz programmable bandpass filter with RF-MEMS capacitance matrices
Author :
Kaunisto, Risto ; Reimann, Klaus ; Boyle, K. ; Krogerus, J. ; Liu, Zhe ; Steeneken, Peter G. ; Ollikainen, J.
Author_Institution :
Nokia, Helsinki
Abstract :
A programmable bandpass filter for 2.0-2.7 GHz centre frequencies and 450-500 MHz 3 dB bandwidth is presented. The filter is based on packaged RF-MEMS capacitor matrices as the tunable elements. The coupled-resonator filter topology was chosen with added transfer zeros. The results show excellent match between simulation and measurements. The measured insertion loss is 4.5-5.5 dB over the tuning range, and the linearity measurements show an OIP3 of 55-64 dBm.
Keywords :
band-pass filters; capacitors; micromechanical resonators; programmable filters; radiofrequency filters; RF-MEMS capacitance matrix; bandwidth 450 MHz to 500 MHz; coupled-resonator filter topology; frequency 2.0 GHz to 2.7 GHz; insertion loss; linearity measurement; programmable bandpass filter; transfer zeros; tunable elements;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.1198
