Study and Design of X- Band Triple Loop Frequency Synthesizer for Satellite Communication System

Abstract

This research is to study and design of X- band triple loop frequency synthesizer for the satellite communication system. The internal frequency synthesizer consists of three phase-locked loop circuits. The proposed frequency synthesizer can operate at the frequency from 6.8 to 7.8 GHz having an adjustable frequency at a time with 100 kHz and output power with 10 dBm. Considering at the measured frequency of 7.33 GHz, phase noises are -85 dBc, -111.66 dBc and 129.95dB at the offset frequency of 100kHz, 100kHz and 1MHz, respectively with 20Hz frequency deviation. The measured results show that the proposed frequency synthesizer has low noise with an accurate frequency deviation.