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Ba_2Ti_9O_(20)的微波测量结果表明它是唯一适用于介质振子的陶瓷(合适的陶瓷应具有高介电常数K,低介电损耗即高Q和谐振频率的低温度系数τf).在4千兆赫情况下,Ba_2Ti_9O_(20)振子的Q>8000,K=39.8,τf=2×10~(-6)/度。对放置波导管中的未金属化陶瓷片进行了Q和τf的测量。用柱形介质振子测量了K。从4-10千兆赫,Q接近于铜波导腔,而温度系数却降低了8倍。
Microwave measurements of Ba_2Ti_9O_ (20) indicate that it is the only ceramic suitable for dielectric resonators (suitable ceramics should have a high dielectric constant K, a low dielectric loss, ie, a low temperature coefficient τf for high Q and resonant frequencies) In the case of megahertz, Q> 8000, K = 39.8 and τf = 2 × 10 -6 / degree for the Ba_2Ti_9O_ (20) oscillator. Q and? F measurements were made on the unmetallized ceramic sheets placed in the waveguides. K was measured with a cylindrical dielectric resonator. From 4-10 GHz, Q is close to the copper waveguide cavity and the temperature coefficient is reduced by a factor of eight.