Title :
High confined Bragg modes for very low phase noise oscillator and narrow band filtering applications
Author :
Floch, JM Le ; Mouneyrac, D. ; Tobar, M.E. ; Cros, D. ; Krupka, J.
Author_Institution :
Sch. of Phys., Univ. of Western Australia, Crawley, WA
Abstract :
This paper describes the use of a new resonator using a hybrid Bragg mode (HBM) with azimuthal variations greater than zero. Usually Bragg modes require a pure transverse electric mode with no azimuthal variations and only electric field component, E0. The mode is both Bragg-like, (Er is tangential to all dielectric boundaries) and also whispering gallery-like, (possesses azimuthal variations). This new dielectric resonator has superior performance with respect to typical dielectric resonators at room temperature. A resonance was observed at 13.4 GHz with an unloaded Q-factor of order 2times105 in an alumina structure, which is more than a factor of six above the dielectric loss limit.
Keywords :
Q-factor; alumina; dielectric losses; dielectric resonator filters; dielectric resonator oscillators; dielectric resonators; permittivity; phase noise; whispering gallery modes; Q-factor; alumina; dielectric loss-tangent; dielectric resonator; frequency 13.4 GHz; hybrid Bragg modes; low phase noise oscillator; narrow band filtering applications; permittivity; temperature 293 K to 298 K; whispering gallery modes; Dielectric loss measurement; Dielectric losses; Dielectric materials; Filtering; Loss measurement; Narrowband; Oscillators; Phase noise; Q factor; Reflection;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
DOI :
10.1109/CPEM.2008.4574858
