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Diagram of a mode spherical Bragg reflector resonator consisting of two thin hemispherical shells of polycrystalline rutile housed within a silver-plated spherical cavity. The shells are held in place by thin-walled cylindrical Teflon supports.
Transmission response of resonator operating at 31.822 GHz with an unloaded factor of 15 724 at room temperature (300 K).
Temperature dependence of the resonant frequency of the resonator. The upper graph shows the frequency shift relative to the maximum value of 31.823 445 GHz measured at 301.3 K. The lower graph shows the temperature coefficient of resonant frequency , which is zero at 301.3 K.
Modeled results for and Bragg reflector resonators with resonant frequencies of 29.988 and 31.833 GHz, respectively. The measured frequency for the based zero resonator was 31.822 GHz. Units of , , and are millimeter, temperature coefficient of frequency is , and geometric factor is . Temperature is 300 K.
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