Research Article | OPEN ACCESS
Design of UWB Bandpass Filter with Notched Band Using Distributed CRLH Transmission Lines
Gyuje Sung
Department of Electrical and Electronic Engineering and IITC, Hankyong National University, 327 Jungangro Ansung, Kyonggi-Do 456-749, Korea
Research Journal of Applied Sciences, Engineering and Technology 2015 12:1358-1362
Received: February 16, 2015 | Accepted: March 7, 2015 | Published: August 25, 2015
Abstract
This study presents an Ultra-Wideband (UWB) filter with a notched band. The filter adopts novel Composite Right/Left-Handed (CRLH) Transmission Lines (TLs), the unit cell of which is theoretically analyzed to derive the design formulas. A model of the CRLH TLs is composed with distributed elements rather than lumped elements. Based on the results of the analysis, it is confirmed that the proposed structures are CRLH TLs. A UWB bandpass filter with a notched band is designed and fabricated using the induced formulas. The measurement results show that the fabricated UWB bandpass filter has an insertion loss of less than 3 dB, a bandwidth of 2.8-10.5 GHz and a rejection of greater than 27 dB at 5.75 GHz.
Keywords:
Bandpass Filter (BPF), Composite Right/Left-Handed (CRLH) transmission line, notched band, Ultra- Wideband (UWB),
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Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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