Hybrid Log Spiral with Loop Antenna

Report No. ARL-TR-5106
Authors: Neal Tesny and Marc Litz
Date/Pages: March 2010; 22 pages
Abstract: We fabricated a hybrid antenna that consists of a logarithmic spiral and loop antenna. The antenna was designed to detect electromagnetic (EM) noise and be broadband in the range of 1 MHz to 1 GHz. This style of antenna can be located in buildings and passageways in inaccessible areas for the purpose of shielding integrity surveillance and life cycle shielding degradation monitoring, and can be used as permanent fixtures that detect critical threshold levels of unwanted EM radiation. The antenna structures were modeled with the FEKO EM numerical code and were also experimentally characterized in the laboratory. The measurements compare well with the predictions from the modeling. This report presents the detailed results of the design, and the FEKO analysis and the measured results.
Distribution: Approved for public release
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Last Update / Reviewed: March 1, 2010