Design of a corrugated tapered slot antenna for microwave imaging

This paper presents the design of a corrugated tapered slot antenna (TSA) with application to microwave imaging (MI) system for brain stroke detection. The antenna is excited by a stepped transmission line through slotline transition. Corrugations are used to reduce the size of the antenna and also improve its radiation performance. Simulated and measured results demonstrate that the proposed antenna operates across bandwidth spanning from 1.1–4.1 GHz, and achieves unidirectional radiation pattern with a broadside gain of 2.9 dB and front-to-back ratio of 14.6 dB.