Novel Miniaturized Harmonic Suppression Branch-Line Coupler Using Artificial Transmission Lines for UHF Applications
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概要
- 論文の詳細を見る
A planar miniaturized branch-line coupler with harmonic suppression property for UHF band applications is presented in this paper. By properly synthesizing the LC-tanks that employ artificial transmission lines, two pairs of quarter-wavelength branch-lines to respectively meet characteristic impedances of 35.4 and 50 ohms can be obtained with the coupler. For the operating band, it can achieve good 3dB power division with a 90° phase difference in the outputs of the through and coupled arms. The coupler also has a small area of 20.5(L) × 18(W)mm2, corresponding to 0.11λg×0.1λg at 922MHz. Compared with conventional couplers, the proposed design not only offers a wide bandwidth of more than 230MHz within ±1° or ±1dB, but also works with additional harmonic suppression for achieving better performance. Therefore, the proposed branch-line coupler with a compact size is well suitable for power division application.
- （社）電子情報通信学会の論文
- 2011-07-01
著者
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Wang Pao-jen
Department Of Electrical Engineering Ming Chi University Of Technology
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Ku Chia-hao
Department Of Electrical Engineering Ming Chi University Of Technology
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LIU Hsien-Wen
Department of Electrical Engineering, National Taiwan University of Science and Technology
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LIN Yu-Shu
Department of Electrical Engineering, National Taiwan University of Science and Technology
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LIN Kuei-Yi
Institute of Occupational Safety and Health
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Lin Yu-shu
Department Of Electrical Engineering National Taiwan University Of Science And Technology
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Liu Hsien-wen
Department Of Electrical Engineering National Taiwan University Of Science And Technology
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- Novel Miniaturized Harmonic Suppression Branch-Line Coupler Using Artificial Transmission Lines for UHF Applications