Title :
The improvement of VCO performance based upon in/out common frequency tuning
Author :
Jang, Jeong-Seok ; Hyuk Jung ; Suh, Kyoung-Whoan
Author_Institution :
Dept. of Wireless Commun., Kwangwoon Univ., Seoul, South Korea
Abstract :
In this paper, we presented a K-band Voltage Controlled Harmonic Oscillator (VCHO) with novel structure. The proposed VCHO is a structure of two hair-pin resonators placed on input and output of active device. By using in/out common frequency tuning structure, the VCHO produced some advantages of the enhanced characteristics of fundamental frequency suppression as well as the improved second harmonic output power. According to measurement results, it has been shown that a VCHO provide the output power of -2.41 dBm, fundamental frequency suppression of -21.84 dBc, and phase noise of -101.44 dBc/Hz @ 100 kHz. In addition, output frequency range of 10.58 MHz could be obtained with a power variation of +/-0.19 dB over its frequency range with respect to the bias voltage from 0 to -10 V for the varactor diode.
Keywords :
active networks; circuit tuning; harmonic oscillators; microwave oscillators; microwave resonators; phase noise; varactors; voltage-controlled oscillators; K-band voltage controlled harmonic oscillator; VCHO; active device; frequency 10.58 MHz; frequency 100 kHz; fundamental frequency suppression; hair-pin resonators; in-out common frequency tuning structure; phase noise; second harmonic output power; varactor diode; voltage 0 V to -10 V; Nickel; Phase-nosie; VCHO; hair-pin; varactor diode;
Conference_Titel :
Applied Electromagnetics (APACE), 2010 IEEE Asia-Pacific Conference on
Conference_Location :
Port Dickson
Print_ISBN :
978-1-4244-8565-9
DOI :
10.1109/APACE.2010.5719758
