Design of a slim wideband-antenna to overcome the strong reflection of the air-to-sample interface in microwave imaging

A new wideband sensor for microwave imaging is introduced. The structure consists of a folded quasi-self complementary monopole antenna which is applied in contact with the sample-under-test (SUT) to minimize the interface impedance mismatch. The sensor presents a slim design that allows the development of very compact antenna arrays, thus avoiding the need of coupling mediums.