Investigation of solid state memory loop

Abstract

This thesis presents the result of an investigation of the art of microwave memories. Both analog and digital memories are described and compared. While most microwave memories in use are still analog, of which a majority use TWT amplifiers, solid state amplifiers are increasingly used and the performance obtained is much better in terms of storage time. The largest part of the thesis is devoted to "Frequency Memory Loops" (FML), their method of operation, and what it take to switch from TWT to solid state amplifiers. The remainder of the thesis examines the use of digital technology to achieve microwave storage. While analog storage is common to everyone, the digital way is diverse. Two concepts are presented.