A wide bandpass filter with defected ground structure for wide out-of-band suppression

Hwang, C.J., Lok, L.B., Thayne, I.G. and Elgaid, K. (2009) A wide bandpass filter with defected ground structure for wide out-of-band suppression. In: APMC: 2009 Asia Pacific Microwave Conference, 7-10 December 2009, Singapore. IEEE: Piscataway, N.J., USA, pp. 2018-2021. ISBN 9781424428014 (doi: 10.1109/APMC.2009.5385299)

Abstract

This paper presents a wide bandpass filter (BPF) with low insertion loss and excellent harmonic out-of-band suppression over a very wideband. The filter consists of a standard ultra-wideband bandpass filters design approach combined with periodic defected ground structure (DGS), which is able to inhibit signal propagation over a wideband. To realize this filter, a wideband microstrip BPF with a bandwidth covering 3.7 GHz is implemented in an RO4350 substrate (epsilon(r) = 3.66, h = 0.762 mm). This bandpass filter shows a wide bandwidth with measured insertion loss better than 0.9dB and spurious suppression better than 24 dB.

• Item Type: Book Sections
• Keywords: Bandpass filter, defected ground structure (DGS), design, propagation, wide bandwidth, wide out-of-band suppression
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Thayne, Prof Iain and Elgaid, Dr Khaled and Lok, Dr Lai Bun
• Authors: Hwang, C.J., Lok, L.B., Thayne, I.G., and Elgaid, K.
• Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Publisher: IEEE
• ISBN: 9781424428014