Browsing by Author "Chang, M. -C. Frank"

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A 205 GHz Serial Direct-Sequence Spread Spectrum (DS/SS) Radar System-on-Chip in 28nm CMOS
(2019-01-01)
Tang, Adrian
;
Kim, Yanghyo
;
Virbila, Gabriel
;
Chang, M. -C. Frank
;
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We present a 205 GHz serial direct-sequence spread spectrum (DS/SS) radar that employs time-domain digital correlation instead of frequency chirps or pulses to estimate a radar signal's time of flight. DS/SS radars offer much simpler range demodulation compared with FMCW or pulse compression radars, while still delivering excellent ranging performance. The demonstrated system offers 4.5 GHz of spread spectrum bandwidth leading to a range resolution of 3.3 cm. The radar is implemented in 28nm CMOS technology and consumes 614 mW.
A W-Band FMCW Radar System-on-Chip Employing Synchronized Switching Digitally Controlled Artificial Dielectric for Chirp
(2019-01-01)
Tang, Adrian
;
Kim, Yanghyo
;
Zhang, Yan
;
Huang, Rulin
;
Chang, M. -C. Frank
This paper presents a fully integrated single-chip radar transceiver (including waveform generation) in 65nm CMOS technology. The single chip radar employs synchronously switched digitally controlled artificial dielectric (DiCAD) in order to extend the FMCW chirp bandwidth leading to higher axial radar resolutions. Measurements with a prototype device demonstrate a factor of 2 increase in chirp bandwidth although increase by larger factors is possible. The entire radar chip occupies 2.5 x 1.7 mm of silicon area and consumes 320 mW of DC power.