Reducing electromagnetic coupling for bistatic subsurface radar using EBG structures

Bistatic radar is system which comprises a transmitter antenna and receiver antenna which are separated by a distance that is comparable to the expected target distance. In recent years, the bistatic subsurface radar is applied to detect relatively shallow structure such as tumor detection, steel reinforced detection in concrete and etc. On the other hand, the electromagnetic coupling between transmitter antenna and receiver antenna is problem, because, the bistatic radar detects a reflection wave from the target by the receiver antenna, therefore artifact caused by the coupling. To reduce this coupling a cavity is used, however, the cavity is not enough to reduce the electromagnetic coupling between transmitter antenna and receiver antenna. On the other hand, the EBG structure is used as electromagnetic insulator. In this research, in order to reduce the electromagnetic coupling the EBG structure is applied.