A new, innovative, wideband antenna design which is short compared to wavelength and has an omni-directional radiation pattern that is theta polarized is investigated. The antenna design is a shorted top hat monocone that is lambda/14.7 tall and has a 3: 1 bandwidth. The bandwidth of the antenna was optimized by a genetic algorithm. To verify the results, a prototype was built. Modeled and measured results compared well. A link budget analysis was also performed to verify that the design performed as well or better than a monopole.

This communication presents a technique that optimizes the orientation of each dipole in an array to minimize the sidelobes in the co-polarization pattern while constraining the gain of the cross-polarized pattern. A genetic algorithm calls an array cost function modeled using the method of moments.

− This paper presents results from calculating the radar cross section (RCS) of two maritime radar reflectors using the method of moments. The Echomaster 152, although smaller in size, produces a higher maximum RCS than the Echomax 230 that includes three layers of corner reflectors. The Echomaster 152 also has deeper nulls in the RCS pattern, which means it is less detectable at those angles.

This paper presents our investigation into the use of small passive reflectors to increase the RCS of a submarine while it is near other ships. In particular we look at computer models of the Echomax 305 that is currently used by the US Navy and compare to other alternative possibilities.

This paper presents the design of a low profile, wideband, vertically polarized antenna to be used on an unmanned aerial vehicle (UAV) or airplane in place of multiple monopole antennas. The new antenna was modeled in Microwave Studio (MWS) and optimized with a genetic algorithm (GA). The GA minimized S11middot from 800 MHz to 2.4 GHz. Experimental measurements for S11middot and the antenna pattern compared very well to MWS results.