A deep parametric study of resistor-loaded bow-tie 55 antennas for ground penetrating radar applications using FDTD
2004 (English)In: IEEE Transactions on Geoscience and Remote Sensing, ISSN 0196-2892, E-ISSN 1558-0644, Vol. 42, no 4, 732-742 p.Article in journal (Refereed) Published
Resistor-loaded bow-tie antennas are analyzed thoroughly to find out their performance on ground-penetrating radar (GPR) applications. The analysis is done with the finite-difference time-domain (FDTD) technique. The antenna is pulse driven and enclosed in a rectangular conducting cavity. The ability to detect a buried conducting sheet using two such identical antennas for transmitting and receiving is investigated. Simulations are carried out for various antenna parameters like end resistor values, flare angle, and antenna length. The gap between the two antennas and their height above the ground are also varied. Moreover, the results are obtained for different sizes, depths, and positions of the buried sheet. It is studied how the broadband impedance characteristics and better target discrimination with low clutter can be achieved by optimally selecting these antenna parameters. Also, it will be shown that apart from the total parallel end resistance, the individual end resistor values and the number of resistors connected have no significant effect on the input impedance and the received signal.
Place, publisher, year, edition, pages
2004. Vol. 42, no 4, 732-742 p.
Buried-object detection; Clutter; Impedance matching; Radar antennas
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-6145DOI: 10.1109/TGRS.2003.819442ISI: 000220946000005ScopusID: 2-s2.0-2442561790OAI: oai:DiVA.org:kth-6145DiVA: diva2:10773
QC 201008182006-09-212006-09-212011-10-28Bibliographically approved