Title :
Monolithic millimetre-wave oscillator using a transmission line periodically loaded by QWITT diodes
Author :
Kesan, V.P. ; Mortazawi, Amir ; Neikirk, D.P. ; Itoh, Takayuki
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX
fDate :
5/26/1988 12:00:00 AM
Abstract :
A small-signal analysis of a travelling-wave structure implemented by periodically loading a parallel-plate waveguide with either resonant tunnelling or QWITT diodes is presented. A small-signal equivalent circuits is used to determine the diode impedance as a function of frequency. The periodicity of the structure, i.e. the distance between adjacent diodes, determines the oscillation (resonant) frequency of the circuit. The analysis shows that change in the oscillation frequency through variation in the design width and thickness of the waveguide is minimal. The physical dimensions of the waveguide facilitate monolithic fabrication of the oscillator circuit
Keywords :
microwave integrated circuits; microwave oscillators; monolithic integrated circuits; transmission line theory; waveguide components; waveguide theory; QWITT diodes; diode impedance; monolithic fabrication; monolithic millimetre wave oscillator; oscillation frequency; parallel-plate waveguide; periodically loading; resonant tunnelling; small-signal analysis; small-signal equivalent circuits; transmission line; travelling-wave structure;
Journal_Title :
Electronics Letters
