Media type: E-Article Title: Compact ultra‐wideband bandpass filters with narrow notched bands based on a ring resonator Contributor: Feng, Wenjie; Che, Wenquan; Xue, Quan imprint: Institution of Engineering and Technology (IET), 2013 Published in: IET Microwaves, Antennas & Propagation Language: English DOI: 10.1049/iet-map.2013.0061 ISSN: 1751-8733 Keywords: Electrical and Electronic Engineering Origination: Footnote: Access State: Open Access