Title :
Micromachined sub-millimeter and millimeter wave variable polarisation compensator
Author :
Drysdale, T.D. ; Chong, H.M.H. ; Blaikie, R.J. ; Cumming, D.R.S.
Author_Institution :
Centre for Nano Eng. Sci. & Technol., Canterbury Univ., Christchurch, New Zealand
Abstract :
A micromachined variable polarisation compensator has been designed and demonstrated experimentally at 100 GHz. The device uses two interlocking artificial dielectric gratings to produce a birefringence that varies as a function of the separation distance. The maximum phase difference was measured to be 74/spl deg/, in good agreement with computer simulations. Quarter wave dielectric antireflection coatings can be added to the exterior surfaces to reduce the insertion loss.
Keywords :
antireflection coatings; birefringence; compensation; diffraction gratings; electromagnetic wave polarisation; losses; micromachining; millimetre wave devices; periodic structures; submillimetre wave devices; 100 GHz; EHF; MM-wave polarisation compensator; THF; birefringence; insertion loss reduction; interlocking artificial dielectric gratings; micromachined variable polarisation compensator; phase difference; quarter wave dielectric antireflection coatings; submillimeter-wave polarisation compensator; Birefringence; Coatings; Computer simulation; Dielectric devices; Dielectric losses; Dielectric measurements; Gratings; Millimeter wave measurements; Phase measurement; Polarization;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.966949
