Title :
A novel high selectivity bandpass filter for wireless monitoring of sleep apnoea patients
Author :
Yang, Yang ; Roy, Sushim M. ; Zhu, Xi ; Karmakar, Nemai C.
Author_Institution :
Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Melbourne, VIC, Australia
Abstract :
In this paper, a novel high selectivity compact dual planar microstrip bandpass filter (BPF) with compact ring resonator and two uniquely designed defected ground structures (DGSs) is proposed. By employing the inter-digital and spiral DGSs, the filter selectivity can be significantly enhanced with a wide suppression of higher order harmonics. The filter has a selectivity of 220 dB/GHz, passband insertion loss (IL) of 1.55 dB and bandwidth of 61 MHz at 2.53 GHz. Moreover, the proposed compact ring resonator saves 70.5% area compared to a conventional ring resonator. The significance of this BPF to be applied in wireless telemetry monitoring systems has been introduced in this paper.
Keywords :
band-pass filters; biomedical telemetry; medical disorders; resonator filters; sleep; compact dual planar microstrip bandpass filter; compact ring resonator; frequency 2.53 GHz; frequency 61 MHz; higher order harmonics; inter-digital defected ground structures; novel high selectivity bandpass filter; passband insertion loss; sleep apnoea patients; spiral defected ground structures; wireless telemetry monitoring systems; Band pass filters; Couplings; Microstrip filters; Microwave filters; Optical ring resonators; Resonator filters; Spirals; Defected ground structures (DGS); harmonic suppression; microstrip bandpass filter; ring resonator; selectivity; wireless telemetry monitoring;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
