Title :
Injection-locked IMPATT oscillators applied to f.d.m. microwave transmission
Author_Institution :
Standard Telecommunication Laboratories Ltd., Harlow, UK
Abstract :
The noise, locking bandwidth and gain characteristics of the injection-locked IMPATT amplifier are discussed and related to the requirement for f.d.m. telephone transmission over microwave circuits. It is shown that the unloaded noise produced by the IMPATT diode limits its application to low-gain operation in medium-capacity radio links, although the gain obtainable can be improved by employing multistage amplifiers.
Keywords :
IMPATT diodes; frequency division multiplexing; microwave links; microwave oscillators; solid-state microwave devices; FDM microwave transmission; gain characteristics; injection locked IMPATT oscillator; locking bandwidth; microwave circuits; multistage amplifiers; noise; radio links; telephone transmission;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19730104
