NASA 1999 SBIR Phase I


PROPOSAL NUMBER: 99-1 20.01-0703 (Chron: 990035)

PROJECT TITLE: Electrostatically Focussed TWT for Space Communications

TECHNICAL ABSTRACT (LIMIT 200 WORDS)

There is a significant and growing NASA requirement for small efficient space communications amplifiers in the range of five- to 50-watts at 20 GHz and above. These powers are too high for solid state technology. Traveling wave tubes, on the other hand, are not very efficient at these low power levels as currently constructed. Also, their price per-watt is high, as is their size and weight per-watt. We propose to close this technology gap with a revolutionary miniature TWT design that can be constructed for under a few hundred dollars and utilizes cathode ray tube design and assembly technology. It will be electrostatically focussed and use a ladder-type slow wave circuit. Feasibility will be tested in PHASE I using sophisticated computer modeling tools for the RF and focusing structures. A prototype beam tester will be constructed to analyze beam- focussing parameters and a slow wave structure will be constructed and cold tested. The objective is to determine

POTENTIAL COMMERCIAL APPLICATIONS

Rapidly expanding commercial demand for high data rate communications makes this a timely innovation for both terrestrial as well as satellite applications. High-resolution video and high-speed internet require more bandwidth and higher frequencies. Video telephones and HDTV will require simultaneous transmission over many channels. These applications are pushing up bandpass, power and frequency requirements above what existing technology is able to offer. The proposed amplifier offers a low cost solution.

NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR

Bernard K. Vancil
FDE Incorporated
21070 SW Tile Flat Road
Beaverton , OR 97007 - 8739

NAME AND ADDRESS OF OFFEROR

FDE Incorporated
21070 SW Tile Flat Road
Beaverton , OR 97007 - 8739