Title :
85-to-127 GHz CMOS transmitter for rotational spectroscopy
Author :
Sharma, Neelam ; Jing Zhang ; Qian Zhong ; Wooyeol Choi ; McMillan, James P. ; Neese, Christopher F. ; De Lucia, Frank C. ; Kenneth, K.O.
Author_Institution :
Texas Analog Center of Excellence, Univ. of Texas at Dallas, Richardson, TX, USA
Abstract :
A transmitter for rotational spectroscopy using a fractional-N PLL (FNPLL) that generates frequency shift keyed signals from 85 to 127 GHz (39% tuning range) with a fine frequency step of ~570 Hz and settling time of ~10 μS is demonstrated. Implemented in 65-nm CMOS, the FNPLL delivers greater than 5 μW of output power, and achieves measured phase noise of less than -70 dBc/Hz in-band and less than -102 dBc/Hz at 10-MHz offset over the output frequency range while consuming 80 mW. The transmitter output is radiated using a bond-wire antenna and successfully utilized in a spectrometer for detection of gas molecules.
Keywords :
CMOS integrated circuits; frequency shift keying; phase locked loops; phase noise; radio transmitters; spectrometers; wire antennas; CMOS transmitter; bond-wire antenna; fractional-N PLL; frequency 85 GHz to 127 GHz; frequency shift keyed signals; gas molecule detection; phase noise; power 80 mW; rotational spectroscopy; size 65 nm; spectrometer; CMOS integrated circuits; Frequency shift keying; Phase locked loops; Phase noise; Spectroscopy; Transmitters; CMOS; Fractional-N; PLL; QVCO; millimeter-wave; rotational spectroscopy; transmitter; wide-tuning;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2014 IEEE Proceedings of the
Conference_Location :
San Jose, CA
DOI :
10.1109/CICC.2014.6946140
