Self Oscillating Mixer with Dielectric Resonator for Low Noise Block Application
Abstract: In this paper, the
development of a self oscillating mixer (SOM) as part of a low noise block
(LNB) for a satellite television receiver is investigated numerically and
experimentally. In contrast to other mixers, the developed SOM requires no
separate local oscillator as it generates own local oscillator signal. The SOM
is developed using a monolithic microwave integrated circuit (MMIC) comprised
of two bipolar transistors coupled as a Darlington pair and a dielectric
resonator to establish a local oscillator signal. The SOM is designed to
oscillate at 3.62GHz driven from 50W signal generator. The prototype of SOM is
fabricated on a dielectric substrate of glass-reinforced hydrocarbon/ceramic
lamination (RO4350B) board which has a thickness of 0.762mm and relative
permittivity of 3.66. The prototype is then characterized experimentally and
exhibits a conversion gain of 8dB with the input and output voltage standing
wave ratio (VSWR) less than 2 across the 2520MHz to 2670MHz operating frequency
band.
Author: Achmad Munir, Endon
Bharata
Journal Code: jptkomputergg110044
