Title :
A unified method for nonlinear noise analysis of all-pole RF MEMS tunable filters
Author :
Sekar, Vikram ; Entesari, Kamran
Author_Institution :
Texas A&M Univ., College Station, TX, USA
Abstract :
A simple, unified approach is presented to theoretically calculate the effect of nonlinear noise in all-pole RF MEMS tunable filters. The proposed admittance-based calculation in the bandpass domain allows easy estimation of filter phase noise while considering the effect of nonlinearity, finite resonator quality factor, and frequency-dependence of inverter networks in Butterworth and Chebyshev tunable filters. Filter phase noise is calculated as a function of input power, tuning state, mechanical frequency offset, and filter order, and comparison of the results with previously published work shows excellent agreement.
Keywords :
Butterworth filters; Chebyshev filters; Q-factor; band-pass filters; invertors; micromechanical devices; phase noise; radiofrequency filters; resonator filters; Butterworth filters; Chebyshev filters; admittance-based calculation; all-pole RF MEMS tunable filters; bandpass domain; filter order; filter phase noise; finite resonator quality factor; inverter networks; mechanical frequency offset; nonlinear noise analysis; tuning state; Admittance; Inverters; Micromechanical devices; Microswitches; Phase noise; Radio frequency; Brownian motion; RF microelectromechanical systems (RF MEMS); phase noise;
Conference_Titel :
Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-61284-754-2
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2011.5972731
