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Ba 2 Ti 9 O 20 as a Microwave Dielectric Resonator
Author(s) -
PLOURDE J. K.,
LINN D. F.,
O'BRYAN H. M.,
THOMSON JOHN
Publication year - 1975
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1975.tb19013.x
Subject(s) - resonator , temperature coefficient , dielectric , dielectric resonator , microwave , materials science , ceramic , dielectric resonator antenna , microwave cavity , waveguide , resonant cavity , helical resonator , analytical chemistry (journal) , dielectric loss , optoelectronics , optics , chemistry , composite material , physics , laser , quantum mechanics , chromatography
Microwave measurements of Ba 2 Ti 9 O 20 show that this ceramic is uniquely suited for dielectric resonators. (Suitable ceramics should have a high dielectric constant K , a low dielectric loss (high Q ), and a low temperature coefficient of resonant frequency, τ.) At 4 GHz, Ba 2 Ti 9 O 20 resonators have Q >8000, K = 39.8, and τ=2 ppm/°C. Measurements of Q and τ were made on unmetallized ceramic resonator disks positioned in a waveguide; K was measured using a dielectric post resonator technique. From 4 to 10 GHz, Q approaches that for a copper waveguide cavity, whereas the temperature coefficient is typically 8 times lower.