Abstract
The effects of cavity dimensions on the resonance frequency and resonance strength of the TE01δmode in split postdielectric resonator (SPDR) technique are investigated by using full-wave simulations. The results of simulations provide guidance for adjusting the dimensional parameters of the set-up to ensure that a strong TE01δ resonance mode is excited. The scaled designs of SPDR fixtures for operation at frequencies that are most important for applications are presented. These designs employ two sets of dielectric resonators (DRs) that can be fabricated from the standard ceramic materials. In addition, it is demonstrated that the resonance frequency of the TE01δ mode in the fixture can be tuned by adjusting the gap of the split DR.
Highlights
The split-post dielectric resonator (SPDR) provides an accurate technique for the measurement of the complex permittivity of low loss dielectric materials, thin films and wideband gap semiconductors that are difficult to measure by other techniques [1,2,3]
The effects of cavity dimensions on the resonance frequency and resonance strength of the TE01δ mode in split postdielectric resonator (SPDR) technique are investigated by using full-wave simulations
It is demonstrated that the resonance frequency of the TE01δ mode in the fixture can be tuned by adjusting the gap of the split dielectric resonators (DRs)
Summary
The split-post dielectric resonator (SPDR) provides an accurate technique for the measurement of the complex permittivity of low loss dielectric materials, thin films and wideband gap semiconductors that are difficult to measure by other techniques [1,2,3]. SPDR technique originates from the resonant post technique for measurements microwave permittivity of a cylindrical dielectric sample, which is based on excitation of a well-defined TE011 mode by means of metal plates on each end of the dielectric cylinder [6]. The dielectric loss is determined by subtracting the conduction Q of the metal boundaries from the measured Q for the TE011 resonance mode [7]. High Q dielectric resonators are suspended on a quartz rod in the center of a metal cavity to minimize radiation and conduction loss and the TE01δ instead of the TE011 mode is used [8,9]. The effect of cavity dimensions on the TE01δ resonance formation is investigated and the importance of having an appropriate cavity size, in order to accentuate the desired resonance mode in the measurements, in demonstrated
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