Title :
Physics based analytical model for charge storage in an ideal heterostructure barrier varactor
Author :
Adamski, Miroslaw E. ; Dobrowolski, Janusz A.
Author_Institution :
Inst. of Electron. Fundamentals, Warsaw Univ. of Technol., Poland
Abstract :
An ideal Heterostructure Barrier Varactor (HBV) is defined as a device with no leakage current. Space charge storage in the cladding regions with uniformly doped modulation layers and undoped spacers is analyzed using the Thomas-Fermi equilibrium model and Joyce-Dixon approximation. The resulting Q-V characteristics of the cladding regions are given in closed-form parametric expressions, with the electron concentration as the independent variable. C-V characteristics of the HBV is also given parametrically with charge as the device state variable. The calculated C-V characteristics are in excellent agreement with the measured data
Keywords :
semiconductor device models; space charge; submillimetre wave diodes; varactors; C-V characteristics; Joyce-Dixon approximation; Q-V characteristics; THF; Thomas-Fermi equilibrium model; charge storage; cladding regions; closed-form parametric expressions; device state variable; electron concentration; heterostructure barrier varactor; physics based analytical model; undoped spacers; uniformly doped modulation layers; Analytical models; Capacitance-voltage characteristics; Circuits; Electrons; Frequency conversion; Leakage current; Physics; Semiconductor devices; Space charge; Varactors;
Conference_Titel :
Microwaves and Radar, 1998. MIKON '98., 12th International Conference on
Conference_Location :
Krakow
Print_ISBN :
83-906662-0-0
DOI :
10.1109/MIKON.1998.737957
