A precision 1.37-meter 60-degree, wire-cage, biconical antenna hasbeen developed for EMC and other metrology applications over thefrequency range of 30-300 MHz. Contrary to the indications of somepreviously-performed studies undertaken by the ANSI C-63.5 working groupon antennas these results indicate that the 1.37-meter biconical antennacan provide acceptable, repeatable performance over the entire 30-300MHz range (as opposed to only 30-200 MHz) when realized in a precisionpackage and attention is paid to the several key areas: deviation fromminimum-scattering behavior, spurious modes in the wire-cage radiatingelements, BALanced-to-UNbalanced transformer (BALUN) performance, andcapacitive base loading in the parallel resonance region
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