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Compact, high-Q, zero temperature coefficient, TE011 sapphire-rutile microwave distributed Bragg reflector resonators
1Department of Physics, University of Western Australia, Nedlands 6903, WA, Australia. mike@physics.uwa.edu.au
Summary
Novel dielectric resonators using distributed Bragg reflectors achieve high Q-factors. Optimized designs offer Q-factors up to 70,000, with specific configurations enabling zero frequency-temperature coefficients for stable operation.
Area of Science:
- Physics
- Materials Science
- Electrical Engineering
Background:
- Dielectric resonators are crucial for high-frequency applications.
- Distributed Bragg reflectors offer precise control over optical and electromagnetic properties.
Purpose of the Study:
- To present novel dielectric resonator designs utilizing distributed Bragg reflectors.
- To optimize resonator dimensions for high Q-factors and frequency-temperature stability.
Main Methods:
- Implementation of TE011 resonance in cylindrical sapphire dielectric resonators.
- Confining resonance using rutile and sapphire dielectric reflectors.
- Finite element calculations for dimensional optimization.
Main Results:
- Achieved a Q-factor of 70,000 for resonators optimized for zero frequency-temperature coefficient.
- Achieved a Q-factor of 65,000 without the zero frequency-temperature coefficient constraint.
- Demonstrated effective confinement of resonance using layered dielectric reflectors.
Conclusions:
- Novel distributed Bragg reflector-based dielectric resonators offer high performance.
- Optimization enables significant Q-factors and frequency stability near 0°C.
- The designs are suitable for advanced microwave and millimeter-wave applications.