https://scholars.lib.ntu.edu.tw/handle/123456789/640864
標題: | A 340-GHz THz Amplifier-Frequency-Multiplier Chain with 360° Phase-Shifting Range and Its Phase Characterization | 作者: | Wang, Chun Chiu, Pin Chun Ko, Chun Lin Tseng, Sheng Hsiang CHUN-HSING LI |
關鍵字: | CMOS | coupled resonators | Frequency measurement | frequency multipliers | Harmonic analysis | impedance matching networks | Phase measurement | phase shifters | phased array | Phased arrays | Power amplifiers | power amplifiers | Power generation | Resonators | terahertz | 公開日期: | 1-一月-2023 | 卷: | 14 | 期: | 1 | 來源出版物: | IEEE Journal on Emerging and Selected Topics in Circuits and Systems | 摘要: | A 340-GHz compact terahertz (THz) amplifier-frequency-multiplier chain (AMC) offering a full 360° phase shifting range for phased-array applications is proposed in this paper. The AMC comprises an 85-GHz phase-shifter-embedded (Δφ-embedded) power amplifier (PA) and a high-output-power frequency quadrupler (FQ). The PA is equipped with multifunctional impedance matching networks (M-IMNs) that can simultaneously provide balun, impedance transformation, and phase-shifting functions. Analytic expressions have been derived to provide design guidelines for the M-IMNs. With the integrated M-IMNs, the proposed PA can concurrently deliver high output power and a phase shift exceeding 90° in a compact chip area. The proposed FQ can achieve optimal impedance matching at second and fourth harmonic frequencies, leading to the output power enhancement of 2.6 dB. Furthermore, the output phase of the PA is quadrupled by the FQ, resulting in the output signal of the AMC with a full 360° phase-shifting capability. A measurement setup for characterizing the phase of a THz signal is also presented. Implemented in a 40-nm CMOS technology without ultra-thick metal layers available, the proposed THz AMC achieves a peak output power of -3.5 dBm at 360 GHz with a conversion gain of 1.8 dB and a 3-dB bandwidth from 340 to 376 GHz. The output phase can continuously vary over 360° within the 324 to 346 GHz frequency range. The phase noise of the output signal at 346 GHz is -105 dBc/Hz at a 10-MHz offset frequency. The proposed 340-GHz AMC consumes 215.1 mW from a 0.9-V supply. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/640864 | ISSN: | 21563357 | DOI: | 10.1109/JETCAS.2023.3345358 |
顯示於: | 電機工程學系 |
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