Accession Number:

AD0257947

Title:

250-500 MC LOW-NOISE TRAVELING-WAVE TUBE AMPLIFIER

Descriptive Note:

Corporate Author:

WATKINS-JOHNSON CO PALO ALTO CALIF

Personal Author(s):

Report Date:

1961-04-14

Pagination or Media Count:

1.0

Abstract:

Results are presented of tests performed on 6 experimental tubes. Gains obtained were marginal being of the order of 20 to 23 db. Noise figure performance of 5 to 6 db indicated that gun parameters were not optimum. Tests employing a field peaker showed that for an 18 larger beam diameter, gain will increase by 6 to 8 db. A direct-pin match employing spread-turns of the helix and a two-section quarter-wave transformer resulted in an input match with VSWR less than or equal to 1.81 and insertion loss of a few tenths of a db. Cold attenuation in excess of 90 db was obtained with a lossy carbon film applied over a 2 34 inch length of the three ceramic helix support rods. Results of a life test program are summarized. Power complement design was completed and circuit breadboarding was initiated. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE