Radio-frequency and microwave load comprising a carbon-bonded carbon fiber composite

Patent · Thu Jan 01 00:00:00 EST 1998

OSTI ID:871489

Lauf, Robert J ^[1]; McMillan, April D ^[2]; Johnson, Arvid C ^[3]; Everleigh, Carl A ^[4]; Moorhead, Arthur J ^[2]

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1. Oak Ridge, TN
2. Knoxville, TN
3. Lake in the Hills, IL
4. Raleigh, NC

A billet of low-density carbon-bonded carbon fiber (CBCF) composite is machined into a desired attenuator or load element shape (usually tapering). The CBCF composite is used as a free-standing load element or, preferably, brazed to the copper, brass or aluminum components of coaxial transmission lines or microwave waveguides. A novel braze method was developed for the brazing step. The resulting attenuator and/or load devices are robust, relatively inexpensive, more easily fabricated, and have improved performance over conventional graded-coating loads.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: Lockheed Martin Energy Systems, Inc. (Oak Ridge, TN)
• Patent Number(s): US 5742211
• OSTI ID: 871489
• Country of Publication: United States
• Language: English

Related Subjects

radio-frequency
microwave
load
comprising
carbon-bonded
carbon
fiber
composite
billet
low-density
cbcf
machined
desired
attenuator
element
shape
tapering
free-standing
preferably
brazed
copper
brass
aluminum
components
coaxial
transmission
lines
waveguides
novel
braze
method
developed
brazing
step
resulting
devices
robust
relatively
inexpensive
easily
fabricated
improved
performance
conventional
graded-coating
loads
coaxial transmission
improved performance
transmission lines
carbon fiber
transmission line
fiber composite
relatively inexpensive
carbon-bonded carbon
bonded carbon
cbcf composite
load element
microwave waveguide
density carbon
novel braze
easily fabricated
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