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http://dx.doi.org/10.4218/etrij.11.0210.0497

Dual-Transmission-Line Microstrip Equiripple Lowpass Filter with Sharp Roll-Off  

Velidi, Vamsi Krishna (Department of Electronics & Electrical Communication Engineering, Indian Institute of Technology Kharagpur)
Sanyal, Subrata (Department of Electronics & Electrical Communication Engineering, Indian Institute of Technology Kharagpur)
Publication Information
ETRI Journal / v.33, no.6, 2011 , pp. 985-988 More about this Journal
Abstract
A novel application of a dual-transmission line is proposed to design a lowpass filter (LPF). The proposed structure uses only transmission line elements to produce an equiripple LPF response with sharp roll-off. Design equations are derived using a lossless transmission line model. Controlling the electrical lengths, three transmission-zeros are realized in the stopband to obtain a sharp roll-off rate and wide stopband bandwidth. A single unit microstrip LPF with a 3-dB cut-off frequency at 1.0 GHz having a roll-off of 135 dB/GHz along with a stopband bandwidth of 69.5% is designed for validation.
Keywords
Lowpass filter; microstrip; transmission line;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 0
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