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Journal of Electromagnetic Waves and Applications Volume 27, 2013 - Issue 5
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Articles

Compact UWB directional coupler with one notch-band

Feng WeiNational Laboratory of Science and Technology on Antennas and Microwaves, Xidian University, Xi’an, 710071, P.R. China
,
Lei ChenElectronic and Information Engineering School, Xi’an Technological University, Xi’an, 710032, P.R. China
,
Yingfang GuoNational Laboratory of Science and Technology on Antennas and Microwaves, Xidian University, Xi’an, 710071, P.R. China
,
Wentao LiNational Laboratory of Science and Technology on Antennas and Microwaves, Xidian University, Xi’an, 710071, P.R. China
&
Xiaowei ShiNational Laboratory of Science and Technology on Antennas and Microwaves, Xidian University, Xi’an, 710071, P.R. China
Pages 599-604 | Received 08 Nov 2012, Accepted 05 Dec 2012, Published online: 29 Jan 2013
 
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Abstract

An ultra-wideband (UWB) parallel coupled-line directional coupler (DC) with one notch-band based on folded stepped impedance resonator (SIR) is investigated in this paper. The proposed UWB DC is comprised of one conventional microstrip directional coupler, two folded shunt quarter-wavelength short-circuited stubs and one SIR with metalized via hole to ground. The SIR is studied and employed to generate one desired notched band. The predicted results are compared with measured data and good agreement is reported.

Acknowledgments

This work was supported by the Fundamental Research Funds for the Central Universities (K50511020013), the National Natural Science Foundation of China under Grant 61101069, and the Principal Research Fund Project of Xi’an Technological University (XAGDXJJ1015).

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