Browsing by Author "Yan, Yu-Ting"

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Reconfigurable 1.2-3.16-GHz Quad-Channel Diplexer with Compact Size, Constant Absolute Bandwidth, and High Isolation
(2017-01-01)
Chi, Pei-Ling
;
Yan, Yu-Ting
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交大名義發表
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National Chiao Tung University
This paper presents a varactor-tuned diplexer with four reconfigurable channel frequencies. To reduce size and enable flexible control of the two passbands at the same output, novel dual-mode resonators are proposed where the even-and odd-mode resonances are, respectively, applied to the higher and lower passbands and can be easily excited at different resonator locations. Moreover, the distributed coupling feed lines are used to generate transmission zeros in the passbands of the other output, leading to high isolation. Experimental results show that the four channels of the fabricated diplexer can be tuned from 1.2 to 1.47 GHz, 1.56 to 1.9 GHz, 2 to 2.45 GHz, and 2.55 to 3.16 GHz with constant absolute bandwidth, greater than 14.4 dB in return loss, and greater than 30 dB in isolation. The diplexer occupies a compact footprint of 0.13 lambda(0) x 0.17 lambda(0), where lambda(0) is the free-space wavelength at 1.2 GHz.
Single-Layer Dual-Band Arbitrary Power-Dividing and In-Phase/Out-of-Phase Power Divider
(2015)
Chi, Pei-Ling
;
Hsu, Ting-Chen
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Yan, Yu-Ting
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資訊工程學系
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Department of Computer Science
In this paper, a single-layer power-divider prototype that allows for arbitrary power divisions and arbitrary in-phase or out-of-phase responses at dual frequencies is proposed for the first time. In particular, at either frequency, the power-dividing ratio as well as the in-phase or out-of-phase design can be flexibly engineered by electrical lengths of the constituent transmission lines. For demonstration purposes, two dual-band examples with power divisions of 6/3 dB and phase differences of in-phase/out-of-phase, and power divisions of 3/3 dB and phase differences of out-of-phase/in-phase, respectively, were developed at 0.9/1.8 GHz. Measured and simulated results are in good agreement.