GENERATOR WITH COAXIAL RESONATOR

Abstract

Autogenerators have found wide application in the receiving and transmitting equipment of communication, navigation and radar, as they determine their stability, power and other important parameters. The object of research in this work is a 1.5 GHz heterodyne from the C4-60 spectrum analyzer. Since the technical description of this device does not contain a number of important parameters, the purpose of the study is to study the frequency run-out, the frequency dependence on the supply voltage, the harmonic level. A schematic diagram and a brief description of the generator design are given. The simulation of a coaxial resonator in the Microwave Office package is carried out. The amplitude-frequency characteristic of the resonator is given. The results of an experimental study of a 1.5 GHz autogenerator are presented. The estimation of parasitic parameters in the spectrum of the output signal is given. The frequency run-out and modulation characteristic along the power supply circuit were measured. These data allow us to make a reasonable requirement for the stability of the supply voltage. The results obtained can be used in the design of receiving and transmitting communication equipment, navigation, electronic warfare. The article may be useful for students and teachers of educational institutions in the educational design of receiving and transmitting equipment. The following electrical parameters have been achieved: – operating frequency 1500 ±1.5 MHz; – output power of at least 13 dBm; – supply voltage minus 12.6 V; – consumption current no more than 60 mA; – frequency run-out in 24 minutes after switching on no more than 325 kHz; – frequency departure when the voltage changes from minus 5 V to minus 13 V no more than 241 kHz.