Abstract: In order to solve the difficulty in designing the feed network of tightly coupled dipole array antenna (TCDA) in VHF and UHF bands, which is not conducive to engineering, we propose a design scheme of TCDA antenna with low profile and dual polar characteristics fed by a new broadband coaxial Balun. The antenna adopts a double dipole element structure. The feed network is composed of a second-order Wilkinson power divider and a new coaxial broadband Balun. The grounding short-circuit branch suppresses the common mode resonance on the E-plane, and the FSS layer suppresses the scanning mismatch on the H-plane. Through ADS-HFSS joint electromagnetic simulation, the simulation results show that the TCDA has a typical value of VSWR<2, ±45° VSWR<2.5 within 110-500 MHz, and the profile height is 265 mm, which is less than 1/10 \lambda _low . The antenna has the characteristics of low profile and easy metallization, which provides a reliable method for the engineering practice of ultrashort wave band TCDA.