Thesis (M.Ing.) -- University of Stellenbosch 1999.ENGLISH ABSTRACT: The development of a low loss coaxial resonator and the integration of it into a coupled -
resonator filter is discussed in the thesis. The filter is of a bandpass type and is used in an
L-band diplexer. The filter has a 2% bandwidth at a center frequency of 1.542 GHz.
The resonator is developed from fundamental principles and practical considerations to a
capacitively-coupled transmission line structure. Various coaxial topologies are
investigated in the process and compared. An accurate network and transmissionline
model is postulated and compared with practical measurements.
Finally an inductively - coupled resonator filter is developed utilising the realised coaxial
resonator.AFRIKAANSE OPSOMMING: Die ontwikkeling van 'n laeverlies koaksiale resoneerder en integrasie in 'n gekoppelde
resoneerderfilter word in hierdie verhandeling bespreek. Die filter is 'n
banddeurlaatprototipe en vind toepassing in 'n L-band diplekser. Die filter het 'n
senterfrekwensie by 1.54 GHz met 'n bandwydte van 2%.
Die resoneerder word vanaf grondbeginsels en praktiese oorwegings ontwikkel tot 'n
kapasitief gekoppelde transmissielynstruktuur. Verskillende koaksiale topologiee word in
die proses ondersoek en met mekaar vergelyk. 'n Akkurate netwerk- en
transmissielynmodel word gepostuleer en word met praktiese metings vergelyk.
Ten slotte word 'n induktief gekoppelde resoneerderfilter ontwikkel deur hierdie
gerealiseerde koaksiale resoneerder te gebruik.Maste