Vertical and Horizontal Dipole Source Powered Broadband Wide-Beamwidth Antenna

Communication systems require broadband wide-beamwidth antennas for wide-angle signal acquisition. In this work, a broadband wide-beamwidth antenna utilizing pattern compensation is proposed for S-band applications. The design achieves 60.5% impedance bandwidth by using two asymptotic electric walls with embedded impedance-matching structures. Aiming at wide beamwidth, multilayer coupling patches mimicking a horizontal dipole are employed to compensate for the radiation intensity drop in the zenith direction brought by the two electric walls. This configuration leads to a beamwidth from 154° to 243° in the E-plane. The H-plane beamwidth is between 109° and 144° by bending the ground plane. Measured results show that the wide beamwidth radiation and less than 1.4 dB gain variation are attained in the bandwidth from 2.17 GHz to 4.05 GHz, in which a max gain of 4.9 dBi is achieved.