High-Isolation Dual-band Shared Aperture Binomial Antenna Array for Airborne Synthetic Aperture Radar Applications

The article presents a two-bands (X/Ku) binomial antenna array with linear polarizations for a shared aperture antenna. The proposed standard linear-polarized antenna array has several advantages low cost, low profile, high isolation, and low cross-polarization. The amplitude distributions of dualdifferent bands of binomial array antenna are creatively linked in the same aperture and resonant at different frequencies. Because of the compact of high isolation and low polarized, binomial arrays are presented as X/Ku-band elements, and the size of the designed antenna was 210×60×0. 8mm3. The results are provided by using CST Microwave Studio Simulator. In this method, series feed center-fed and open stub with reduced polarization levels are simulated for two different operational frequencies (9.3GHz, and 13.265GHZ) at isolation between port-1 and 2 is -57, The bandwidth of 0.088%(X-band) and 1.79%(Ku-Band), Return Loss for 25dB/-15.7dB and Proposed antenna gains are X/KU 13.7dBi/13.4 dBi. The antenna provides high isolation and low cross-polarization above 25 dB. A proposed tapering technique for an antenna X/Ka-band linear-polarized antenna array has been described, which may be helpful in Synthetic Aperture Radar applications