Title :
Analysis and design for millimeter-wave PHEMT VCO in time domain
Author :
Jin Long ; Xu Ruimin ; Liu Shuzhang
Author_Institution :
Inst. of Appl. Phys., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper a Ka-band microstrip PHEMT VCO is analyzed and designed for output power and oscillating frequency in the time domain using a nonlinear transistor model. The microstrip is lumped into inductors and capacitors for analysis. Making use of the nonlinear transistor model and its parameters, the state equation of the lumped equivalent circuit of the VCO is founded. The state equation is solved by computer simulation with PSPICE or MicroSim. Utilizing the result of simulation, transient and steady-state process of the VCO under the given initial conditions can be understood and a Ka-band PHEMT VCO is designed.
Keywords :
HEMT circuits; SPICE; circuit simulation; equivalent circuits; microstrip circuits; millimetre wave circuits; millimetre wave oscillators; time-domain analysis; time-domain synthesis; transient analysis; voltage-controlled oscillators; Ka-band; MicroSim; PSPICE; computer simulation; lumped equivalent circuit; microstrip VCO; millimeter-wave PHEMT VCO; nonlinear transistor model; oscillating frequency; output power; state equation; steady-state process; time domain analysis; time domain design; transient process; Capacitors; Frequency; Inductors; Microstrip; Millimeter wave transistors; Nonlinear equations; PHEMTs; Power generation; Time domain analysis; Voltage-controlled oscillators;
Conference_Titel :
Infrared and Millimeter Waves, 2000. Conference Digest. 2000 25th International Conference on
Conference_Location :
Beijing, China
Print_ISBN :
0-7803-6513-5
DOI :
10.1109/ICIMW.2000.893103
