Wideband Moderate Gain Dielectric Rod Antenna with Low Cross Polarization

This manuscript reports a simple technique to develop a linearly polarized dielectric rod antenna at 26 GHz. The basic antenna is designed theoretically. The design optimization is carried out using commercially available finite element method (FEM) based 3D electromagnetic solver. The antenna is designed considering Teflon (ε
r
= 2.08) as the dielectric material. The antenna is then fabricated using optimized dimensions. Antenna performance is measured in a Compact Antenna Test Range. The antenna produces wide impedance bandwidth of approximately 46% and a gain of about 14.8 dBi at 26 GHz. Its half power beamwidths are 32.2° x 34° and cross-polar discrimination (XPD) is higher than 28 dB.