Design and wideband spurious performance prediction for a mixed-resonator combline/TE01-mode DR filter using FDTD

Weily, Andrew R.; Mohan, A.S.

doi:10.1002/(sici)1098-2760(19991205)23:5<266::aid-mop3>3.0.co;2-c

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Dielectric Resonators

Weily¹,

Mohan²

2005

Encyclopedia of RF and Microwave Engineering

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Dielectric resonators (DRs) are versatile components that have applications in microwave filters, oscillators, antennas, and measurement techniques. They have the advantages of high Q factor, low cost, and excellent temperature stability, and enable significant miniaturization of microwave circuits. This article provides background information on the evolution and theoretical analysis of DRs while highlighting current developments in the field. Mode classifications and field distributions are discussed for lower‐order modes of cylindrical DRs, and mode charts are presented to illustrate the effect of DR aspect ratio and cavity enclosure on the mode spectrum. A simplified analysis method for calculating the resonant frequency of the TE 01 δ mode, the one most commonly used in practice, is described in detail. Information on calculating the Q factor, the temperature coefficient, and details of typical material parameters available from manufacturers are also presented. The article concludes with information on external and interresonator coupling for DR s and methods to compute coupling factors.

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