Title :
Design and analysis of VCO with tunable ring filter
Author :
Ishida, Hitoshi ; Araki, Kiyomichi
Author_Institution :
National Inst. of Inf. & Commun. Technol., Tokyo, Japan
Abstract :
To realize a voltage controlled oscillator (VCO) in wireless communications, a device is developed using a new tunable ring filter. The oscillator is based upon the tunable ring filter, with a compact and sharp rejection filter, high performance active inductor. It operates in the 3.2 GHz to 4.1 GHz frequency range. The VCO´s phase noise level is -93dBc/Hz at 100kHz offset from a 3.5GHz carrier.
Keywords :
microstrip filters; microwave oscillators; voltage-controlled oscillators; 100 kHz; 3.2 to 4.1 GHz; 3.5 GHz; active inductors; attenuation pole; microstrip filters; ring impedance; sharp rejection filter; stub impedance; tunable ring filters; voltage controlled oscillators; Active inductors; Attenuation; Circuit optimization; Filters; Frequency; Impedance; Inductance; Tunable circuits and devices; Tuning; Voltage-controlled oscillators;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1517041
