18 October 2001 GPR application of the conical spiral antenna probe
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The project motivating this paper is the deployment of a frequency independent antenna on the transceiver of a monostatic ground-penetrating radar used to detect mines. The design goal is that the radiation pattern and input impedance to nearly uniform over a band from 1 GHz to 5GHz if the antenna is partially immersed in a typical soil medium. The contemplated method of deployment is to have the antenna straddle the air-soil interface i.e. partly in free space and partly underground, radiating into the ground. The particular subclass of frequency-independent antenna under investigation for this application is the conical equiangular-spiral antenna, in which thin wires are wound around a conical frame and the radiation is from the apex and reaches its peak in the axial direction. The conical structure, about 50cm long and with a maximum diameter of 12cm, is thrust into the ground apex-first at an angle of about 70 degrees to the vertical.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Harold R. Raemer, Carey M. Rappaport, "GPR application of the conical spiral antenna probe", Proc. SPIE 4394, Detection and Remediation Technologies for Mines and Minelike Targets VI, (18 October 2001); doi: 10.1117/12.445505; https://doi.org/10.1117/12.445505

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