Design Procedures for Series and Parallel Feedback Microwave DROs

Date
2007-12
Authors
Alaslami, Nauwaf
Journal Title
Journal ISSN
Volume Title
Publisher
Stellenbosch : University of Stellenbosch
Abstract
Clear procedures for designing dielectric resonator oscillators (DROs) are presented in this thesis, including built examples to validate these design procedures. Both series and parallel feedback DROs are discussed and the procedures for building them are presented. Two examples at different frequencies for each type of DRO are constructed and tested with the results shown. The first is at a frequency of approximately 6.22 GHz and the second for the higher frequency of 11.2 GHz. The DROs for the desired frequencies are designed using the Microwave Office (MWO) software by AWR with the design based on the small-signal model (scattering parameters). Oscillators are produced using the negative resistance method. The circuit achieves low noise by using a dielectric resonator with a high Q factor. Both the series and parallel feedback DRO circuits can be mechanically tuned around the resonant frequency to maximize performance.
Description
Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2007.
Keywords
DRO, Dielectric resonator, Series feedback, Theses -- Electronic engineering, Dissertations -- Electronic engineering
Citation