Reduced branch-line coupler using eight two-step stubs for W-Band application of MMIC(Session8B: High-Frequency, Photonic and Sensing Devices)

概要

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We have designed and fabricated a branch-line coupler to examine the possibilities of fabrication for various passive components, to apply millimeter waves using newly proposed transmission lines, i.e. DAMLs. In order to reduce the size of the branch-line coupler, we designed the reduced blanch-line coupler with DAML structure using eight two-step stubs. We see that the area of the blanch-line coupler with structure DAML was reduced by 40%. It was shown that the fabricated branch-line coupler has wideband characteristics of the coupling loss of 3.61dB and transmission loss of 4.25dB at a frequency of 100GHz. Also the isolation characteristic and return loss were -35.5dB and -36.9dB at 100GHz, respectively.
社団法人電子情報通信学会の論文
2008-07-02