|
Guest >> Sign In |
|
|
DIRECTED
ENERGY
PROFESSIONAL
SOCIETY
Abstract: 24-Symp-027
|
|
|
|
UNCLASSIFIED, PUBLIC RELEASE
A Single HPM Antenna that Works with Many Waveguide Modes
We will describe a remarkably-simple, moderate gain (~10 to 25 dB) HPM-capable antenna that can be driven directly by any of a wide variety of cylindrical waveguide modes, all while producing an output beam that should be practical/useable for both DEW and laboratory/test applications. This antenna is especially well-suited to use with HPM sources that generate higher-order cylindrical waveguide mode outputs including, but not limited to, certain relativistic magnetrons. The connection is direct, i.e., no separate or added mode converter is needed. In addition, the antenna's simple geometry should ease fabrication, making it very cost effective. Its natural dimensions offer a particularly good fit to narrow-radius DEW platforms (i.e., it can fit into a cylinder with a radius that ~matches that of the HPM source output waveguide), thus potentially enabling HPM DEW integration into smaller platforms than possible with other antennas. Usable band and bandwidth depend on the mode employed, but span roughly a full octave for any single mode. If considered over a span of many modes, usable bandwidth may approach a full decade or even more. We will discuss the geometry of the antenna, principles of its operation, results from full-wave RF numerical models, and future plans.
UNCLASSIFIED, PUBLIC RELEASE
|