Design and optimization of dual and wide band polarizer for low cost Ka band applications

Abstract

Two dual band K/Ka polarizers have been designed, taking into account dimensions constraints for easiness of manufacturing and low cost production. The short polarizer (1.9lambda) presents very good performances, S11<-30 dB and axial ratio better than -0.5 dB in Rx and Tx frequency bands, for classical K/Ka frequency. The second dual band polarizer which is also very wide band in each Tx and Rx frequency bands; has good performances over the dual and wide bands (AR better than -1.74 dB). The specifications have still reached after the yield analysis on all dimensions. These polarizers have the particularity to be very short versus the current ones on the market, with still good performances and manufacturability easiness, which made them very attractive for consumer two way systems by satellite. A prototype is on-going in being manufactured to verify the performances