An Ultral-Wideband Tightly Coupled Array Antenna

With the development of multifunctional integration system of radar, communication and electronic warfare, ultra-wideband array antenna has become one of the important development directions in the field of antenna. A dual-polarization 9:1 bandwidth tightly coupled array antenna is designed and manufactured. The periodic boundary method of HFSS software is used to simulate and optimize the central element. An 8×8 elements array is simulated and manufactured. The simulated and measured results show, limit by the size of the array, the active standing wave ratio results of the array is worse than the periodic boundary results at low frequency, and the real impedance band is 2.5-18GHz. The pattern beam is too fat and the scanning effect is not ideal at low frequency.