Improvement in Radar Imaging by UWB Antenna Attached to an Optical Electric Field Sensor
نویسندگان
چکیده
Humanitarian demining is a very urgent and important task for many countries and many techniques are proposed for its solution [1]. We have developed a bistatic GPR system using an Optical Electric Field Sensor (OEFS) as a receiver for landmine detection [2]. This system has two unique features, one is that it is a bistatic radar and the other one is to use a OEFS as a receiver. Therefore, it is our expectation that this system will be used for stand-off detection. In this system, reflections from a buried target are received by the receiver when it scans over the target. Then, radar image is constructed by migration in time domain. In order to improve the resolution of a radar image, receiving antenna with wide frequency bandwidth is required. In this paper, we propose a small Vivaldi antenna that has wide frequency bandwidth and evaluate a radar image obtained with the small Vivaldi antenna.
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