volume | PIER Journals

2013-07-30

Design of Dual Band Filter Based on a Novel DGS Structure

Yang Li,

Dr. Yang Li

School of Physical Electronics

University of Science and Technology of China

China

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Hong-Chun Yang,

Dr. Hong-Chun Yang

School of Physical Electronics

University of Electronic Science and Technology of China

China

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Shao-Qiu Xiao

Dr. Shao-Qiu Xiao

School of Electronics and Information Technology

Sun Yat-sen University

P. R. China

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Progress In Electromagnetics Research Letters, Vol. 41, 167-174, 2013

doi:10.2528/PIERL13061503

Abstract

This letter presents a dual-band bandpass filter (BPF) using interdigital coupling lines with a new defected ground structure (DGS) pattern. Traditional DGS structures are mainly used to realize wide bandstop characteristics. In this letter, by introducing a pair of coupling stubs in the aperture of the DGS, a narrow passband can be achieved within a wide stopband, so a dual-band bandpass filter can be implemented. An equivalent circuit model is derived to describe the filter. And the circuit simulation result agrees well with the EM simulation one. The position and bandwidth of the two passbands can be designed and adjusted independently. In order to verify the theory, a dual-band bandpass filter is designed, fabricated and measured. The simulated and measured results are in good agreement.

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Yang Li, Hong-Chun Yang, and Shao-Qiu Xiao, "Design of Dual Band Filter Based on a Novel DGS Structure," Progress In Electromagnetics Research Letters, Vol. 41, 167-174, 2013.
doi:10.2528/PIERL13061503

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