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Journal of Electromagnetic Waves and Applications Volume 29, 2015 - Issue 11
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Articles

Dual-band patch quadrature coupler with controllable power division ratios

S.Y. ZhengDepartment of Electronics and Communication Engineering, Sun Yat-sen University, Guangzhou510006, China;SYSU-CMU Shunde International Joint Research Institute, Shunde528300, ChinaCorrespondence[email protected]
,
X.Y. ZhangSchool of Electronic and Information Engineering, South China University of Technology, Guangzhou510641, China
,
Y.M. PanSchool of Electronic and Information Engineering, South China University of Technology, Guangzhou510641, China
,
Y.Z. ShiDepartment of Electronics and Communication Engineering, Sun Yat-sen University, Guangzhou510006, China
&
Y.L. LongDepartment of Electronics and Communication Engineering, Sun Yat-sen University, Guangzhou510006, China;SYSU-CMU Shunde International Joint Research Institute, Shunde528300, China
Pages 1523-1533 | Received 03 Mar 2015, Accepted 18 May 2015, Published online: 16 Jun 2015
 
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Abstract

By employing reactive loading method, a dual-band quadrature coupler, with flexible frequency ratio and controllable power division ratios, is proposed. Stubs with unequal width are loaded on different quadrants of circular sector patch to achieve dual-band operation with simplicity both in structure and design procedure. They also offer the possibility to provide different power division ratios at the two frequency bands for some special cases, and the quadrature phase characteristics can be obtained simultaneously. To verify the proposed configuration, four dual-band quadrature couplers for C and X band applications are designed, fabricated, and measured.

Disclosure statement

No potential conflict of interest was reported by the authors.

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