Title :
Characteristics of an area-variable varactor diode
Author :
Kim, Dong-Wook ; Lee, Jae-Jin ; Kwon, Young-Se ; Hong, Song-Cheol
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
fDate :
11/1/1996 12:00:00 AM
Abstract :
Photoresponses and microwave characteristics of an area-variable varactor diode are investigated in the frequency range of 1-7 GHz. The on/off ratio of the capacitance as large as 18.5 at 1 GHz is demonstrated and it is shown that the ratio strongly depends upon the access resistance between the cathode and the floating contacts. The capacitance of the diode is significantly altered by optical illuminations. The change increases nonlinearly with the input light power and the maximum value of 450% is achieved at 1 GHz with 1045 nW light power. These microwave and optical characteristics are described with a simple equivalent circuit model
Keywords :
capacitance; equivalent circuits; microwave diodes; semiconductor device models; varactors; 1 to 7 GHz; 1045 nW; access resistance; area-variable varactor diode; capacitance; equivalent circuit model; input light power; microwave characteristics; on/off ratio; optical illumination; photoresponses; Anodes; Capacitance; Cathodes; Equivalent circuits; Frequency; Nonlinear optics; Optical control; Semiconductor diodes; Varactors; Voltage-controlled oscillators;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
