Extremely High Q-factor Dielectric Resonators for Millimeter Wave Applications Jerzy Krupka§, Michael E. Tobar* § Institute of Microelectronics.

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Extremely High Q-factor Dielectric Resonators for Millimeter Wave Applications Jerzy Krupka§, Michael E. Tobar* § Institute of Microelectronics and Optoelectronics, Department of Electronics, Warsaw University of Technology, Warsaw, Poland *Frequency Standards and Metrology Research Group, Physics Department, the University of Western Australia

Dielectric resonator partially shielded by metal enclosure

Cylindrical dielectric resonator in metal enclosure

Geometric factor versus size of metal enclosure d/h=2.0, Dc/d=Lc/h

a) Q-factor and b) electric energy filling factor versus size of metal enclosure

Geometric factors of TEn01 modes of shielded spherical dielectric resonator

Q-factors due to radiation of TEn01 modes versus permittivity for an open spherical resonator

Electric field distribution (1D) for TE103 mode of 5 layer YAG resonator b) and empty cavity

Electric field distribution (2D) for 3 layer YAG resonator G=10800 Ohm pe2=0.09466

Electric field distribution (2D) for TE103 mode of 5 layer YAG resonator G=117962 Ohm pe2+pe4= 0.09877

Electric field distribution (1D) for TE101 mode of 5 layer YAG resonator

Electric field distribution (2D) for TE101 mode of 5 layer YAG resonator G=475 Ohm pe2+pe4=0.7509

Q-factor of spherical Bragg reflection dielectric resonators versus frequency a) TE102 mode (3 layers) b) TE103 mode (5 layers)

Q-factor optimization for YAG resonator

Measurements on the TE102 mode of 3 layer spherical Bragg resonator made of YAG