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Author Ching-Luh Hsu ♦ Jen-Tsai Kuo ♦ Chin-Wei Chang
Sponsorship IEEE Microwave Theory and Techniques Society
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1963
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Dual band ♦ Couplers ♦ Circuits ♦ Impedance ♦ Transmission line theory ♦ Radio frequency ♦ Wireless LAN ♦ Insertion loss ♦ Power transmission lines ♦ Microstrip ♦ stepped impedance ♦ Branch-line coupler ♦ dual band ♦ miniaturization ♦ rat-race coupler
Abstract Branch-line and rat-race couplers are designed to have dual-band operation with arbitrary power division ratios. An elementary two-port is proposed to imitate the 90<sup>deg</sup> section at the two designated frequencies with different characteristic impedances. The two-port consists of a stepped-impedance section with open stubs attached to its two ends, and its circuit parameters are determined by the transmission line theory. The use of the stepped-impedance sections also leads to circuit miniaturization. By the standard microstrip technology, investigated also includes the realizable power division ratios and circuit bandwidths in the two bands, the upper limit of the ratio of the two designated frequencies and the miniaturization factor of the proposed circuit. Hybrid couplers operating at 2.45/5.2 GHz with various power division ratios are designed, fabricated and tested. Experiment results are compared with the theory and simulation.
Description Author affiliation :: Dept. of Electron. Eng., Ta Hwa Inst. of Technol., Hsinchu
Author affiliation :: Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu
ISSN 00189480
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-01-01
Publisher Place U.S.A.
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Volume Number 57
Issue Number 1
Size (in Bytes) 1.02 MB
Page Count 8
Starting Page 149
Ending Page 156


Source: IEEE Xplore Digital Library