Browsing by Author "Meng, ChinChun"

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0.35-mu m SiGe BiCMOS Weaver Image Rejection Receiver with 60-GHz Double-Quadrature Sub-harmonic Schottky Diode Mixer and 10-GHz Double Quadrature Gilbert Mixer
(2017-01-01)
Wang, Kuo-An
;
Meng, ChinChun
;
Lo, Tai-Lin
;
Huang, Guo-Wei
;
電機工程學系
A Weaver image rejection receiver using 60-GHz double-quadrature sub-harmonic Schottky diode mixer is demonstrated using 0.35-pm SiGe BiCMOS technology. A miniature RF quadrature generator is realized to generate 60-GHz quadrature RE signals. A Weaver image rejection architecture is applied in this paper to filter out the image signals. A triple-balanced sub-harmonic Schottky diode mixer with a trifilar transformer is adopted to the first down conversion stage to obtain good LO1-RF and 2LO(1)-RE isolations while the down-converted IF1 signals are converted to the base band I/Q signals with a double-quadrature Gilbert mixer at the second down conversion stage. As a result, a 60-GHz Weaver image rejection receiver with a 2-GHz channel bandwidth is achieved with IP1dB of 2 dBm and HP3 of 14 dBm.
5/60 GHz 0.18 mu m CMOS Dual-Mode Dual-Conversion Receiver Using a Tunable Active Filter for 5-GHz Channel Selection
(2016-11)
Hsiao, Yu-Chih
;
Meng, ChinChun
;
Yang, Shih-Te
;
電機工程學系
;
Department of Electrical and Computer Engineering
A dual-mode dual-conversion receiver with two farapart carrier frequencies, 5 and 60 GHz, and two very different channel bandwidths, tens-MHz and GHz, is demonstrated in a standard 0.18 mu m CMOS technology. The dual conversion architecture receives 60-GHz mode using Schottky diodes at the first conversion stage and merges 5-GHz mode at the second conversion stage. The 5-GHz RF channel selection is achieved by inserting a 20-MHz bandwidth tunable active filter after a 5-GHz low-noise amplifier for the noise concern and before the second down-conversion mixer to relax the linearity requirement of subsequent stages. A tunable active filter with improved linearity using a transformer-coupled scheme is employed. As a result, the narrow 20 MHz channel bandwidth selection at 5-GHz mode shows a 500 MHz tuning range with noise figure of 9 dB and conversion gain of 28 dB. For 60-GHz operation, the 3-dB IF bandwidth is 1 GHz with noise figure of about 20 dB and conversion gain of -3 dB.