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

Patent · Thu Jan 01 04:00:00 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]

---

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: LOCKHEED MARTIN ENRGY SYST INC
• 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

/333/
aluminum
attenuator
billet
bonded carbon
brass
braze
brazed
brazing
carbon
carbon fiber
carbon-bonded
carbon-bonded carbon
cbcf
cbcf composite
coaxial
coaxial transmission
components
composite
comprising
conventional
copper
density carbon
desired
developed
devices
easily
easily fabricated
element
fabricated
fiber
fiber composite
free-standing
graded-coating
improved
improved performance
inexpensive
lines
load
load element
loads
low-density
machined
method
microwave
microwave waveguide
novel
novel braze
performance
preferably
radio-frequency
relatively
relatively inexpensive
resulting
robust
shape
step
tapering
transmission
transmission line
transmission lines
waveguides