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An ultra-compact wearable antenna, for electronic travel aid (ETA) applications in the 24.05&#x2013;24.25 GHz frequency band, is presented. The artificial magnetic conductor (AMC)-antenna combination reduces the backward radiation to the wearing person, while improves antenna&#x0027;s radiation properties and bandwidth without increasing its area. Prototypes of the AMC-antenna have been fabricated and measured. In order to test its performance for the application, imaging has been conducted by means of synthetic aperture radar techniques by placing the antenna in the arm of a user to take advantage of natural body movement. Electromagnetic images have been obtained and the target has been identified, demonstrating the suitability of the AMC-antenna for the ETA system.

AMC-Backed Twin Arrow Antenna for Wearable Electronic Travel Aid System at 24 GHz