Title :
Target Detection With Impulse Radiating Antenna
Author :
Bajracharya, Chandra ; Xiao, Shu ; Baum, Carl E. ; Schoenbach, Karl H.
Author_Institution :
Dept. of Electr. & Comput. Eng., Old Dominion Univ., Norfolk, VA, USA
fDate :
7/3/1905 12:00:00 AM
Abstract :
A prolate spheroidal reflector antenna focuses subnanosecond pulsed radiation in the near field with a small beamwidth, allowing for applications such as target detection. Confocal imaging in free space has been demonstrated with such an antenna for both transmitting and receiving. A polarized beam allows for the detection of linear target orientation. We show that decreasing the focal spot size by adding a dielectric lens enables us to resolve a target with a typical dimension of 4 cm. The spatial resolution can be further enhanced by increasing the dielectric constant of the lens´ innermost layer.
Keywords :
antenna radiation patterns; microwave antennas; microwave imaging; object detection; receiving antennas; reflector antennas; transmitting antennas; confocal imaging; dielectric constant; dielectric lens; impulse radiating antenna; linear target orientation; polarized beam; prolate spheroidal reflector antenna; receiving antenna; spatial resolution; subnanosecond pulsed radiation; target detection; transmitting antenna; Dielectric constant; Image resolution; Imaging; Lenses; Reflector antennas; Confocal imaging; dielectric lens; near field; subnanosecond pulses;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2157070
