Design Considerations for a Half Impulse Radiating Antenna.
Abstract
Recently developed pulsers have the capability to generate approximately 100GW of peak power with an impulse width of about 130 PS Full Width Half Max, and with a repetition rate of about 1 kHz. However, all these hydrogen-gap pulsers produce output into a coaxial waveguide, which is a single-ended configuration. This configuration is difficult to match to an antenna, since most free space antenna designs require a balanced feed. One can convert the signal to a balanced configuration with a coaxial unzipper or point geometry converter, but there may be losses associated with these transitions. An alternative is to feed the signal into half a reflector Impulse Radiating Antenna (IRA). For this project, we developed the design principles of half reflector IRAs, and we calculated the radiated far field. We also provided a design for the lens that converts a coaxial Transverse Electromagnetic (TEM) mode to a spherical wave on the feed arms. Finally, we provided measurements of a ground plane model of a half reflector IRA. The results of this project have already been summarized in two Sensor and Simulation Notes and a Prototype IRA memo, so we only very briefly summarized their contents.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1996
- Accession Number
- ADA327643
Entities
People
- Everett G. Farr