W-band grooved-wall circularly polarised horn antenna

摘要

This study presents a novel design of circularly polarised horn antenna in W-band with wide impedance bandwidth and 3 dB axial ratio (AR) bandwidth. By introducing a pair of grooves on the wall of a horn antenna, this simple and compact structure is capable of generating a circular polarisation (CP) wave without any extra polariser and is expecting a better power-handling capability. The full-wave simulation results show that 36.9% bandwidth from 75.4 to 109.5 GHz can be achieved withS(11) dB and AR dB, while the directivity is 16.56 +/- 1.37 dBic. It is anticipated that the proposed antenna is suitable for wideband mmWave applications.