A Dual-Polarized 1-D Tightly Coupled Dipole Array Antenna

A dual-polarized 1-D tightly coupled dipole array (TCDA) antenna is proposed in this paper. To apply the TCDA design concept to a 1-D array, we place a conducting wall with slits and ferrite sheets along the 1-D dipole array. The simulated dual-polarized 1-D infinite TCDA antenna has a wide overlapped bandwidth of 2.83:1 (from 1 to 2.83 GTIz) with VSWR <; 2, high isolation (>25 dB) between the horizontal and vertical polarizations (VPs), and low height of 1/5 λ at the lowest operating frequency. A prototype of the proposed array is fabricated and measured, which consists of nine horizontal polarization (TIP) dipoles and eight VP dipoles interleaved between the TIP dipoles. The measured results show high gains >7.2 dB when scanning up to 30° and a wide half-power beamwidth in the yz plane >61° over the operating frequency band for both polarizations, consistent with the simulation result.