Electronically tuned 23 GHz Gunn oscillators for a microwave datalink

A market has been identified for 23 GHz, short-haul, low-capacity, digital radio. The dissertation presents the development of the varactor controlled Gunn oscillators that constitute the crystal locked microwave sources of the radio. An accurate description of a design procedure for Gunn oscillators at 23 GHz is presented. With reference to advanced modulation methods which require constant modulation indices, a method of linearising the voltage/frequency characteristic of the varactor controlled Gunn oscillator is described, which allows direct modulation of the source at 23 GHz. Due to the wide operating temperature of the radio a technique to temperature compensate the oscillator is presented. The dissertation ends with an investigation how the semiconductor device's spread affects the oscillator characteristics and an evaluation of the noise performance of the Gunn oscillator.

Grantor dc:publisher.institution

Department of Electrical Engineering

Year dc:date.issued

1988

Author dc:creator

• Kratzenstein, L

Advisor dc:contributor.advisor

• Downing, B J

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/11427/8327

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/8327