A Dual Polarization Tightly Coupled Array Antenna Fed by Transformer Balun

In order to solve the difficulty of designing the feeding network of the tightly coupled dipole array antenna (TCDA) in the VHF and UHF frequency bands, we design a dual polarization TCDA antenna fed by the transformer Balun. The feeding network is composed of the coaxial line and the transformer Balun. The grounding short-circuit column is used to suppress the E-plane common mode resonance and the FSS layer is used to suppress the H-plane scan impedance mismatch. The simulation results show that the typical VSWR of the antenna is less than 2 in the 110-500MHz band, the VSWR is less than 2.5 in the ± 45° scan angle, and the section height is 275mm, about 1/10λ low . The antenna has the characteristics of ultra wide band, wide angle scan, low profile and easy processing.