Abstract
In this paper, a reflector type unidirectional 3D antenna for biomedical microwave imaging has been presented. A reflector wall perpendicular to the ground plane has been introduced to achieve higher gain and directive radiation pattern. Bending technique is utilized to reduce the overall antenna size and to get resonance at a lower frequency. The proposed antenna obtained measured operating band at 2.37 GHz to 3.70 GHz. The dimension of the 3D radiating structure is 30 x 10 x 17 mm(3). The antenna has a peak realized gain of 4.52 dB. Unidirectional radiation pattern and gain within lower microwave frequency, make the proposed antenna a potential candidate to be used in microwave imaging for biomedical diagnosis. The design and simulation process are performed in the CST Microwave Studio software. The antenna is fabricated from 0.2 mm thick copper sheets. PNA Network Analyzer (N5227A) and Satimo Nearfield Measurement system has been used to measure the performance of the fabricated prototype.