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Design Method for Quasi-Optimal Multiband Branch-Line Couplers

L. Piazzon ; Paul Saad (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik ; GigaHertz Centrum) ; P. Colantonio ; F. Giannini ; Kristoffer Andersson (GigaHertz Centrum) ; Christian Fager (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik ; GigaHertz Centrum)
International Journal of Rf and Microwave Computer-Aided Engineering (1096-4290). Vol. 24 (2014), 1, p. 117-129.
[Artikel, refereegranskad vetenskaplig]

In this article, the design approach, the implementation, and experimental results of multiband branch-line couplers operating at arbitrary frequencies are presented. The conventional branch-line coupler structure is adapted to multiband operation by shunting its four ports with multiband reactive networks. The performance of the proposed multiband couplers is theoretically analyzed and optimized through the even-odd mode circuit analysis. Dual-band (2.4-3.5 GHz), triple-band (1.5-2.4-4.2 GHz), and quad-band (1.5-2.4-3.5 GHz) microstrip branch-line couplers have been realized and tested to verify the design method. The good experimental results (input return loss greater than 15 dB and amplitude imbalance lower than 0.7 dB) show excellent agreement with theoretical and simulated ones, thus validating the proposed approach.

Nyckelord: balanced, branch-line, coupler, multiband, passive, DUAL-BAND, TRANSMISSION-LINES, HYBRID, AMPLIFIER

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Denna post skapades 2014-01-16. Senast ändrad 2015-12-17.
CPL Pubid: 192664


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