Title :
High-Q MOS-varactor modeling for mm-wave VCOs
Author :
Itano, Yuka ; Itoh, N. ; Yoshitomi, Sadayuki ; Hoshino, Hiroaki
Author_Institution :
Grad. Sch. of Comput. Sci. & Syst. Eng., Okayama Prefectural Univ., Soja, Japan
Abstract :
High-Q and scalable MOS varactor for mm-wave VCO has been studied. To realize high-Q varactor in mm-wave region, low varactor capacitance and low series resistance of unit cell are essential. Since low varactor capacitance and low series resistance are impossible to realize simultaneously, optimization and scalable model are necessary. This paper presents strategy of high-Q optimization, a novel scalable model for mm-wave varactor, and confirmation results by VCO measurements. The Q of small-geometry varactor improved 30 times at f =30 GHz. The novel scalable varactor model improved its accuracy from 21.9% to 1.7%.
Keywords :
millimetre wave oscillators; optimisation; varactors; voltage-controlled oscillators; frequency 30 GHz; high-Q MOS-varactor modeling; low series resistance; low varactor capacitance; mm-wave VCO; optimization model; scalable varactor model; small-geometry varactor; unit cell; voltage-controlled oscillator; Capacitance; Capacitance-voltage characteristics; Phase noise; Resistance; Semiconductor device modeling; Varactors; Voltage-controlled oscillators;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2012 Asia-Pacific
Conference_Location :
Kaohsiung
Print_ISBN :
978-1-4577-1330-9
Electronic_ISBN :
978-1-4577-1331-6
DOI :
10.1109/APMC.2012.6421546
