Miniature Supercooled, Multiarm, Spiral, Antijam Controlled Reception Pattern Antenna (CRPA )

Phase 1 develops an innovative approach for GPS antijam CRPA antennas using miniature multi-arm spiral elements to form a CRPA. The technique leverages experience with antijam technology, supercooling, and spiral antenna CRPA development. This combinationof technologies and capabilities will result in a small, robust and innovative CRPA antijam solution for munitions. The effort will focus on the development of a spiral CRPA composed of spiral elements. In addition, the program will examine an alternateelement design using a smaller dipole array, and a single spiral aperture array configured as a CRPA. The project will concentrate on performance and feasibility of these solutions using conventional materials at ambient temperatures and a study ofsupercooling to reduce aperture size and improve performance. The goal of the program will be to meet GPS receive and CRPA performance objectives in a significantly reduced aperture size that results in an adaptive antenna array capable of L1/L2 M-codebandwidth operation. Phase 1 results in a cost-effective CRPA design for munitions that extends GPS update performance in multiple jammer environments to the target. The small munitions CRPA approach will reduce size and cost, and provide high performancein a small space.