Wideband Low-Profile Orthogonal Polarized Slot Radiator with High Isolation and Low Cross Polarization Based on Printed Dipole Antennas

Abstract

The design of a wideband low-profile orthogonal polarized slot radiator is presented in this paper. The radiator is excited by printed dipole antennas. The operating frequency range of the radiator on the level of the VSWR less than 3.0 is in the range from 1.229 to 1.733 GHz. The bandwidth is 0.504 GHz or 41% relative to 1.229 GHz. The electrical dimensions of the radiator at the upper operating frequency are approximately 0.46 λ×0.46 λ×0.20 λ. The realized gain is from 0 to 3.1 dB. The radiated power exceeds 0.75 W at 1.0 W at the input. The isolation between the inputs of the radiator is more than 48 dB, and the cross polarization level is less than minus 48 dB.