Research Article | OPEN ACCESS
Design of Compact UWB Bandpass Filter with Improved Out-of-band Performance 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 3:338-343
Received: December 29, 2014 | Accepted: February 5, 2015 | Published: May 30, 2015
Abstract
This study presents an Ultra-Wideband (UWB) filter with improved out-of-band performance. The proposed filter adopts novel Composite Right/Left-Handed (CRLH) Transmission Lines (TLs), which are modeled with distributed elements instead of lumped elements. A unit cell of the CRLH TLs is theoretically analyzed to derive the design formulas. The analyzing results confirm that the proposed structures are CRLH TLs. A novel UWB bandpass filter with improved out-of-band performance 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 2.8 dB, a bandwidth of 2.8-10.4 GHz and a rejection of more than 18 dB from 11.6 to 23.4 GHz.
Keywords:
Bandpass Filter (BPF), Composite Right/Left-Handed (CRLH) transmission line , group delay, Ultra- Wideband (UWB),
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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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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