Wide stopband single‐/dual‐bandpass filters using rotational symmetric composite right/left‐handed resonators. Issue 1 (January 2017)

• Record Type: Journal Article
• Authors: Guo, Zhi‐Gui; Yang, Guo‐Min
• Is Part Of: Microwave and optical technology letters. Volume 59:Issue 1(2017:Jan.)
• Page Start: 49
• Page End: 53
• Publication Date: 2017-01
• Subjects: composite right/left‐handed -- rotational symmetry -- bandpass filter -- wide stopband -- standing wave; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.30221
• Languages: English
• ISSNs: 0895-2477

Abstract

ABSTRACT: Both single‐/dual‐bandpass wide stopband filters with rotational symmetry using composite right/left‐handed resonators are proposed in this study. Designs of this type obtain a single passband at 2.40 GHz as well as dual passbands at 2.40 and 5.20 GHz, and achieve a wide stopband with no additional structures, which are implemented and demonstrated with full‐wave simulations and measurements. Standing wave coupling models are presented to analyze the characteristics of a wide stopband effectively. The proposed single‐bandpass filter (BPF) with rotational symmetry achieves a preferable wide stopband, in which | S 21 | is mainly <−20 dB below 19.00 GHz; the proposed dual‐BPF also obtains a wide stopband, in which | S 21 | < −20 dB below 16.90 GHz. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:49–53, 2017