Precision L-Band Photonic Clocks

Not Available This proposal addresses the problem of creating a low profile antenna of relatively small electrical size that can be made conformal and integral to a variety of airborne structures and yet achieve wide band performance. As the candidate for low-profile/conformal antennas for ultra-wide band airborne sensors, APTI proposes the Printed Circuit Fractal Loop (PCFL) Antennas. The PCFL antenna has novel and other attractive features in addition to the wide band common to regular fractal antennas: 1) Constant phase center makes them a better wide band element for phased arrays or for designing circular polarized antennas for satellite communications; 2) Can be configured as a single ultra-wide band or multi-wide band antenna; 3) Easy to manufacture using printed circuit technology; 4) Readily conformal to airframe structure; 5) Low profile and light weight. Phase I study will focus on: 1) Numerical modeling and simple prototype validation of various designs; 2) Comparative and trade study of system and mechanical performance on different designs; 3) Optimized paper design for Phase II fabrication and testing.