Accession Number : ADA256558


Title :   High Power Millimetre-Wave Polarizers


Descriptive Note : Final rept.


Corporate Author : FYSISCH EN ELEKTRONISCH LAB TNO THE HAGUE (NETHERLANDS)


Personal Author(s) : Nennie, F A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a256558.pdf


Report Date : Apr 1992


Pagination or Media Count : 43


Abstract : The operation and realization of 4 high-power polarizers at 35.0 GHZ and 94.0 GHZ are described in this report. Results of calculations and measurements are discussed. The realized polarizers make use of an elliptical waveguide to convert the linearly polarized incident wave into an outward left or right-hand circularly polarized wave. Main measurement results are: the axial ratio at 35.0 GHZ is less than 1.0 dB over 5 percent bandwidth. The return loss is better than 21 dB (VSWR 1.2) over more than 30 percent bandwidth. The insertion loss is less than 0.3 dB over more than 30 percent bandwidth. The isolation is more than 18 dB over 5 percent bandwidth. The maximum peak-power is 63 kW. The axial ratio at 94.0 GHZ is less than 1.0 dB over 5 percent bandwidth. The return loss is better than 26 dB (VSWR 1.1) over more than 3 percent bandwidth. The insertion loss is less than 0.75 dB over more than 3 percent bandwidth. The isolation is more than 20 dB over 3 percent bandwidth. The maximum peak-power is 9.5 kW. All polarizers have been made waterproof and dust- proof. Polarization, Polarizers, Elliptical waveguide, Circular polarized wave, High power polarizers.


Descriptors :   *MILLIMETER WAVES , *POLARIZERS , HIGH POWER , MEASUREMENT , RATIOS , POLARIZATION , PEAK POWER , TRANSLATIONS , BANDWIDTH , CIRCULAR , INSERTION LOSS , POWER , OPERATION , DUST , NETHERLANDS , ISOLATION , WAVEGUIDES


Subject Categories : Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE