Numerical analysis of planar bicone and TEM horn array antennas

Focused radiation of high power radio frequency (RF) transients has previously been achieved using reflector antennas fed by single spark-gap switches. An attractive alternative would use an array of many medium-power sources, which are capable of lower pulse-to-pulse jitter than the spark gaps, and would offer the added advantage of time-delay scanning. This paper presents the results of theoretical and numerical modeling of candidate radiating elements for ultrawideband (UWB) arrays. The elements examined are TEM horns that connect to one another at the mouths, and their limiting case, the planar bicone.