TY - JOUR
T1 - Investigation in open circuited metal lines embedded in defected ground structure and its applications to UWB filters
AU - Lin, Wen Jeng
AU - Li, Jian Yi
AU - Chen, Lih Shan
AU - Lin, Ding Bing
AU - Houng, Mau Phon
N1 - Funding Information:
Manuscript received September 12, 2009; revised November 23, 2009. First published January 26, 2010; current version published March 10, 2010. This work was supported by the National Science Council under Contract NSC97-2221-E-006-239-MY2. W.-J. Lin, J.-Y. Li, and M.-P. Houng are with the Institute of Microelectronics, Department of Electrical Engineering, National Cheng-Kung University, Tainan 701, Taiwan (e-mail: [email protected]). L.-S. Chen is with the Department of Electronic Engineering, I-Shou University, Kaohsiung, Taiwan. D.-B. Lin is with the Institute of Computer and Communication Engineering, National Taipei University of Technology, Taipei, Taiwan. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/LMWC.2010.2040213 Fig. 1. Schematic diagrams of (a) top view of proposed UWB BPF, (b) bottom view of proposed UWB BPF, (c) top view of proposed UWB BPF with notch band implementation, (d) bottom view of proposed UWB BPF with notch band implementation.
PY - 2010/3
Y1 - 2010/3
N2 - A novel method for notch implementation in ultra- wideband (UWB) bandpass filter (BPF) using open circuited metal lines embedded in a defected ground structure (DGS) is proposed. Distinct from traditional notch implementation, the proposed method uses the additional metal lines with half waveguide length embedded in defected ground structure to produce additional notch band behavior based on the DGS bandpass behavior. Furthermore, the equivalent circuit model of the proposed UWB BPF with notch implementation is established for explaining the circuit behaviors more explicitly. In this way, the proposed circuit has a very small size, only amounting to 0.41 by 0.22 guided wavelength at the center frequency of 6.85 GHz. The experimental filter has a notchband frequency of 5.5 GHz, with two observable attenuation poles at 1.65 and 11.36 GHz, respectively. The measured BPF insertion loss is less than 1.0 dB throughout the passband of 3.1 to 10.6 GHz, and the variation of group delay is less than 0.2 ns in this band, except for the notched band.
AB - A novel method for notch implementation in ultra- wideband (UWB) bandpass filter (BPF) using open circuited metal lines embedded in a defected ground structure (DGS) is proposed. Distinct from traditional notch implementation, the proposed method uses the additional metal lines with half waveguide length embedded in defected ground structure to produce additional notch band behavior based on the DGS bandpass behavior. Furthermore, the equivalent circuit model of the proposed UWB BPF with notch implementation is established for explaining the circuit behaviors more explicitly. In this way, the proposed circuit has a very small size, only amounting to 0.41 by 0.22 guided wavelength at the center frequency of 6.85 GHz. The experimental filter has a notchband frequency of 5.5 GHz, with two observable attenuation poles at 1.65 and 11.36 GHz, respectively. The measured BPF insertion loss is less than 1.0 dB throughout the passband of 3.1 to 10.6 GHz, and the variation of group delay is less than 0.2 ns in this band, except for the notched band.
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U2 - 10.1109/LMWC.2010.2040213
DO - 10.1109/LMWC.2010.2040213
M3 - Article
AN - SCOPUS:77949424396
SN - 1531-1309
VL - 20
SP - 148
EP - 150
JO - IEEE Microwave and Wireless Components Letters
JF - IEEE Microwave and Wireless Components Letters
IS - 3
M1 - 5398850
ER -