A novel high selectivity bandpass filter for wireless monitoring of sleep apnoea patients

Yang Yang*, Sushim M. Roy, Xi Zhu, Nemai C. Karmakar

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

3 Citations (Scopus)


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.

Original languageEnglish
Title of host publicationAsia-Pacific Microwave Conference Proceedings, APMC 2011
Place of PublicationBarton, ACT
PublisherEngineers Australia
Number of pages4
ISBN (Print)9780858259744
Publication statusPublished - 2011
Externally publishedYes
EventAsia-Pacific Microwave Conference, APMC 2011 - Melbourne, VIC, Australia
Duration: 5 Dec 20118 Dec 2011


OtherAsia-Pacific Microwave Conference, APMC 2011
CityMelbourne, VIC


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