Browsing by Author "Chou, Yi-Chieh"

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A Balanced Digital Phase Shifter by a Novel Switching-Mode Topology
(2013-06-01)
Lin, Yun-Wei
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Chou, Yi-Chieh
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Chang, Chi-Yang
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電信工程研究所
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Institute of Communications Engineering
A balanced digital phase shifter by a novel switching-mode topology is proposed. A 3-bit balanced digital phase shifter is given as an example, the working bandwidth of which is from 2.3 to 2.7 GHz. The proposed 3-bit balanced phase shifter comprises two balanced loaded-line phase shifters (90 degrees and 45 degrees) and six twist-line broadband 180 degrees phase shifters. The balanced loaded-line digital phase shifter changes phases while the even-or odd-mode signal is excited. The 180 degrees phase shifter controls the balanced signal to be even or odd mode. The commensurate transmission line filter is used as the biasing circuit.
Planar Quasi-Yagi Antenna for Future 5G and WiGig Applications
(2018-01-01)
Chi, Pei-Ling
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Chou, Yi-Chieh
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電機工程學系
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Department of Electrical and Computer Engineering
This paper presents a planar quasi-Yagi antenna that covers the operating bandwidths of 28 GHz, 38 GHz, and 60 GHz. Experimental results show that the fabricated antenna can achieve a 10-dB impedance bandwidth from 25.8 GHz to 29.8 GHz and from 33.2 GHz to > 67 GHz, and can demonstrate consistent end-fire patterns and peak gain greater than 6 dBi over the entire bandwidths.