Title :
Investigations on microwave characteristics of MgF2 at cryogenic temperatures
Author :
Jacob, Mohan V. ; Mazierska, Janina ; Takeuchi, Shoji
Author_Institution :
Electr. & Comput. Eng., James Cook Univ., Townsville, Qld., Australia
Abstract :
Magnesium fluoride is a hard and birefringent crystal with low refractive index and a wide transmission range. It is widely used in prisms and optical windows. We have studied the microwave properties of MgF2 using a Hakki-Coleman dielectric resonator technique. The permittivity varies from 5.026 to 5.165 in the temperature range 15-295 K and at a frequency of 32.9 GHz. The loss tangent varies from 1 × 10-5 to 8 × 10-5 when the temperature increases from 15 K to 295 K.
Keywords :
birefringence; cryogenics; crystals; dielectric resonators; magnesium compounds; microwave measurement; refractive index; 15 to 295 K; 32.9 GHz; Hakki-Coleman dielectric resonator technique; MgF2; birefringent crystal; cryogenic temperatures; magnesium fluoride; microwave characteristics; optical windows; prisms; refractive index; Birefringence; Dielectrics; Magnesium compounds; Microwave theory and techniques; Optical refraction; Optical resonators; Optical variables control; Permittivity; Refractive index; Temperature distribution;
Conference_Titel :
TENCON 2004. 2004 IEEE Region 10 Conference
Print_ISBN :
0-7803-8560-8
DOI :
10.1109/TENCON.2004.1414832
