Compact, high-Q, zero temperature coefficient, TE011 sapphire-rutile microwave distributed Bragg reflector resonators

Some novel new resonator designs based on the distributed Bragg reflector a re presented. The resonators implement a TE011 resonance in a cylindrical s apphire dielectric, which is confined by the addition of rutile and sapphir e dielectric reflectors at the end faces. Finite element calculations are u tilized to optimize the dimensions to obtain the highest Q-factors and zero frequency-temperature coefficient for a resonator operating near 0 degrees C. We show that a Q-factor of 70,000 and 65,000 can be achieved with and wi thout the condition of zero frequency-temperature coefficients, respectivel y.