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

Abstract

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. 9 figs.

Inventors:
; ; ; ;
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
OSTI Identifier:
644434
Patent Number(s):
5742211
Application Number:
PAN: 8-620,616
Assignee:
Lockheed Martin Energy Systems, Inc., Oak Ridge, TN (United States)
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 21 Apr 1998
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; RF SYSTEMS; MICROWAVE EQUIPMENT; COMPOSITE MATERIALS; BRAZING; ATTENUATION; ENERGY ABSORPTION

Citation Formats

Lauf, R J, McMillan, A D, Johnson, A C, Everleigh, C A, and Moorhead, A J. Radio-frequency and microwave load comprising a carbon-bonded carbon fiber composite. United States: N. p., 1998. Web.
Lauf, R J, McMillan, A D, Johnson, A C, Everleigh, C A, & Moorhead, A J. Radio-frequency and microwave load comprising a carbon-bonded carbon fiber composite. United States.
Lauf, R J, McMillan, A D, Johnson, A C, Everleigh, C A, and Moorhead, A J. Tue . "Radio-frequency and microwave load comprising a carbon-bonded carbon fiber composite". United States.
@article{osti_644434,
title = {Radio-frequency and microwave load comprising a carbon-bonded carbon fiber composite},
author = {Lauf, R J and McMillan, A D and Johnson, A C and Everleigh, C A and Moorhead, A J},
abstractNote = {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. 9 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {4}
}