Investigating a double layer Vivaldi antenna design for fixed array field measurement Online publication date: Sat, 31-Jul-2010
by Majid Ostadrahimi, Sima Noghanian, Lotfollah Shafai, Amer Zakaria, Cam Kaye, Joe LoVetri
International Journal of Ultra Wideband Communications and Systems (IJUWBCS), Vol. 1, No. 4, 2010
Abstract: Vivaldi antenna is widely known as a broadband antenna. In this paper, we investigate a modified Vivaldi antenna with improved cross polarisation working in the ultra-wideband (UWB) frequency range (3.1-10.6 GHz) to be used as multiple probes for microwave tomography system. Our study includes investigation of radiation characteristics of the antenna, antenna design steps, fabrication sensitivity effects on the antenna performance and proposing and implementing a twenty-four antenna element system for fast data acquisition, including a novel method for frequency selection in microwave tomography applications. We also studied the fidelity parameter of the antennas inside the twenty-four element setup. The mutual coupling of adjacent elements, in spite of close proximity, is less than -17dB and fidelity variations for the antennas located in front of transmitter are less than 10%.
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