Vol. 56

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2015-08-30

Novel Compact Dual-Band Branch-Line Couplers with Half Elliptical-Ring Impedance Stub Lines

By Yan-Ling Han, Yong-Chang Jiao, Tao Ni, and Zi-Bin Weng
Progress In Electromagnetics Research Letters, Vol. 56, 9-15, 2015
doi:10.2528/PIERL15072802

Abstract

Novel compact dual-band branch-line couplers are presented. By using ahalf elliptical-ring impedance stub as a basic unit, dual-band branch-line couplers are obtained. Sincea couple of half elliptical-ring impedance stubs can be folded inward to its enclosed areawithout overlap, the branch-line couplercan be miniaturized. In order to verify the effectiveness of the half elliptical-ring impedance stub, two different branch-line couplers operating at 2.4/5.8 GHz are designed, fabricated and tested. Measured results agree well with simulated ones. Compared with the stepped-impedance-stub branch-line couplers, sizes of the proposed couplers are reduced by 43% and 30%, respectively.

Citation


Yan-Ling Han, Yong-Chang Jiao, Tao Ni, and Zi-Bin Weng, "Novel Compact Dual-Band Branch-Line Couplers with Half Elliptical-Ring Impedance Stub Lines," Progress In Electromagnetics Research Letters, Vol. 56, 9-15, 2015.
doi:10.2528/PIERL15072802
http://jpier.org/PIERL/pier.php?paper=15072802

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