Accession Number:

AD0839494

Title:

DEVELOPMENT OF AN 8 TO 18 GHZ LOW NOISE TWT AMPLIFIER.

Descriptive Note:

Final rept. Jan 67-Apr 68,

Corporate Author:

WATKINS-JOHNSON CO PALO ALTO CA

Personal Author(s):

• Dombro, L.

Report Date:

1968-08-01

Pagination or Media Count:

29.0

Abstract:

An X- and K sub u-band, low-noise traveling-wave tube amplifier covering the 8 to 18 GHz frequency range was developed. This amplifier exhibits a maximum noise figure of 8.6 dB over 100 percent of the band and a 7.5 dB maximum noise figure over 60 percent of the band. Nominal small signal gain is greater than 30 dB, and saturated power output ranges from 5 to 10 dBm in an 18 pound, 4.5 inch diameter package. The design of this broadband amplifier is a logical extension of several known techniques including the fabrication of uniform dense cathode, low-loss circuits, broadband low-reflection couplers, and uniform, low transverse field permanent magnets, as well as considerable experience and knowledge gained in the earlier development of narrow band amplifiers in X- and K sub u-band. The performance of this X- and K sub u-band amplifier is superior to presently available low-noise amplifiers in K sub u-band alone, and it opens up applications for new wideband receiving systems with reduced complexity and cost. Author

Descriptors:

• *MICROWAVE AMPLIFIERS)
• (*TRAVELING WAVE TUBES
• X BAND
• K BAND
• NOISE(RADIO)
• ELECTRON GUNS
• MAGNETS
• CIRCUITS
• HELIXES

Subject Categories:

• Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE