A LOW POWER HEATER-CATHODE SYSTEM FOR HIGH FREQUENCY SPACE COMMUNICATIONS

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$418,668.00
Award Year:
1992
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Agency Tracking Number:
17125
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Fde Assoc
Rural Rt 1 Box 988, Beaverton, OR, 97007
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
BECAUSE OF NEW TECHNOLOGY, IT IS NOW POSSIBLE TO OFFER HIGHER ELECTRON-BEAM DENSITIES AND LONGER CATHODE LIFE AT LOWER HEATER POWERS THEN EVER BEFORE. THIS IS A SIGNIFICANT DEVELOPMENT FOR HIGH-FREQUENCY SPACE COMMUNICATIONS, KA BAND AND ABOVE; IN THIS AREA, THE LIMITING FACTOR ON MICROWAVE POWER AND EFFICIENCY HAS BEEN THE CATHODE LOADING AND SIZE. A VERY SMALL, RUGGED, HEATER-CATHODE SYSTEM THAT WILL EXPLOIT THESE NEW TECHNOLOGIES WILL BE DEVELOPED. IT WILL PRODUCE UP TO 2 AMPS PER SQUARE CENTIMETER OF CURRENT DENSITY, LIVE FOR AT LEAST 30,000 HOURS, AND CONSUME LESS THAN 1/2 W OF HEATER POWER. THE DEVICE WILL EMPLOY THE NEW SCANDATE OXIDE CATHODE, AS WELL AS A CATHOPHORETICALLY COATED AND DARKENED HEATER THAT IS NOW AVAILABLE IN VERY SMALL SIZES. THE ABILITY TO EXTRUDE SEAMLESS TUBING AT WALL THICKNESS NOT PREVIOUSLY AVAILABLE WILL PROVIDE MAXIMUM THERMAL ISOLATION OF THE CATHODE-SUPPORT STRUCTURE. BECAUSE OF NEW TECHNOLOGY, IT IS NOW POSSIBLE TO OFFER HIGHER ELECTRON-BEAM DENSITIES AND LONGER CATHODE LIFE AT LOWER HEATER POWERS THEN EVER BEFORE. THIS IS A SIGNIFICANT DEVELOPMENT FOR HIGH-FREQUENCY SPACE COMMUNICATIONS, KA BAND AND ABOVE; IN THIS AREA, THE LIMITING FACTOR ON MICROWAVE POWER AND EFFICIENCY HAS BEEN THE CATHODE LOADING AND SIZE. A VERY SMALL, RUGGED, HEATER-CATHODE SYSTEM THAT WILL EXPLOIT THESE NEW TECHNOLOGIES WILL BE DEVELOPED. IT WILL PRODUCE UP TO 2 AMPS PER SQUARE CENTIMETER OF CURRENT DENSITY, LIVE FOR AT LEAST 30,000 HOURS, AND CONSUME LESS THAN 1/2 W OF HEATER POWER. THE DEVICE WILL EMPLOY THE NEW SCANDATE OXIDE CATHODE, AS WELL AS A CATHOPHORETICALLY COATED AND DARKENED HEATER THAT IS NOW AVAILABLE IN VERY SMALL SIZES. THE ABILITY TO EXTRUDE SEAMLESS TUBING AT WALL THICKNESS NOT PREVIOUSLY AVAILABLE WILL PROVIDE MAXIMUM THERMAL ISOLATION OF THE CATHODE-SUPPORT STRUCTURE.

* information listed above is at the time of submission.

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