INVESTIGATION OF IMPROVED AIRBORNE ANTENNA TECHNIQUES FOR COMBAT SURVEILLANCE
Abstract
The investigation concerns the development of techniques for using the partially dielectric loaded parallel plane waveguide, which supports surface wave propagation, to illuminate an array of slots. Copper clad teflon was investigated in an effort to improve the structural properties of array plates. Based on data from single slots and a 10 x 2 element array, this material was found to be unsuited to the desired application. Surface waves set up on the dielectric enhanced the mutual coupling between slots, making array design based on single slot data impossible. Attempts to shorten the taper section were unsuccessful, however a possible alternative method involving the direct launching of a loosely bound wave is given. The required amplitude and phase distributions necessary for the csc squared theta pattern were determined and an initial 27 x 2 element array was constructed. A larger trough waveguide capable of supporting a 100 wavelength long array of slots is being built. This will produce the narrow E plane beam width.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1963
- Accession Number
- AD0423865