Title :
High linearity switchable dual-mode microstrip bandpass filters
Author :
Chakrabarty, K. ; Athukorala, L. ; Budimir, D.
Author_Institution :
Wireless Commun. Res. Group, Univ. of Westminster, London, UK
Abstract :
A compact highly linear microstrip dual-mode electronically switchable filter is presented. The key characteristics of the dual-mode switchable filter are investigated and described. A second order filter design procedure is outlined to facilitate the realisation of Butterworth and Chebyshev functions. The proposed filter was built and tested with NXP pin diode model BAP65-03. The measured and simulated results are in good agreement. The measured insertion loss in the ON state was 3.0 dB the isolation in the OFF state was 45 dB at the centre frequency. An evaluation of filter distortion is presented for digitally modulated 16 QAM and QPSK signals.
Keywords :
Butterworth filters; Chebyshev filters; band-pass filters; microstrip filters; quadrature amplitude modulation; quadrature phase shift keying; Butterworth function; Chebyshev function; NXP pin diode model BAP65-03; QAM; QPSK signal; bandpass filter; compact highly linear microstrip filter; filter distortion; insertion loss; loss 3.0 dB; loss 45 dB; second order filter design; switchable dual-mode microstrip filter; Band pass filters; Microstrip filters; Microwave filters; Nonlinear distortion; Resonant frequency; Resonator filters; Switches; Resonators; filters; nonlinear distortion; reconfigurable filters; switchable filters;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
