Design of dual-band bandpass filter using DGS with controllable second passband

Chaudhary, Girdhari, Choi, Heungjae ORCID: https://orcid.org/0000-0003-1108-293X, Jeong, Yongchae, Lim, Jongsik, Kim, Dongsu and Kim, Jun-Chul 2011. Design of dual-band bandpass filter using DGS with controllable second passband. IEEE Microwave and Wireless Components Letters 21 (11) , pp. 589-591. 10.1109/LMWC.2011.2167140

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Abstract

In this letter, the application of a variable characteristic impedance transmission line that can be used to design a dual-band bandpass filter (BPF) is presented. The proposed filter offers a fixed first passband and a controllable second passband. The tuning of the second passband is achieved by varying the characteristic impedance of the shunt open stub of stub loaded resonator (SLR) with the help of a defected ground structure (DGS) transmission line and varactor diodes. In order to validate the theoretical predictions and simulated results, a two stage dual-band BPF with three transmission zeros was implemented and experimentally verified.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Publisher:	Institution of Engineering and Technology
ISSN:	1531-1309
Last Modified:	27 Oct 2022 08:50
URI:	https://orca.cardiff.ac.uk/id/eprint/63540

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