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(Color online) Effect of the number of spherical shells on the unloaded of a reflector resonator using alumina at room temperature.
(Color online) Magnitude of electric field for fifth order distributed bragg reflector (a) and fifth order aperiodic reflector resonator (b). Dark red regions of color represent maximal positive values of electric field, and dark blue represents minimal negative values. Zero electric field is white. The dielectric regions are overlaid as dark gray and the conducting shield is the outer black ring.
Thicknesses and filling factors of regions for quarter-wave DBR and aperiodic reflector resonator (ARR) using polycrystalline alumina ( and ) at . The ’s of DBR and ARR are and , respectively. The region thicknesses are not identical for the DBR case since for spherical Bessel functions the distance between zeroes and adjacent minima/maxima asymptotically approach the trigonometric quarter-wave thickness of as the radial distance increases. The surface resistance of the silver-plated metallic shield is .
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