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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.

Inventors:
 [1];  [2];  [3];  [4];  [2]
  1. Oak Ridge, TN
  2. Knoxville, TN
  3. Lake in the Hills, IL
  4. Raleigh, NC
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
871489
Patent Number(s):
US 5742211
Assignee:
Lockheed Martin Energy Systems, Inc. (Oak Ridge, TN)
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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; /333/

Citation Formats

Lauf, Robert J, McMillan, April D, Johnson, Arvid C, Everleigh, Carl A, and Moorhead, Arthur J. Radio-frequency and microwave load comprising a carbon-bonded carbon fiber composite. United States: N. p., 1998. Web.
Lauf, Robert J, McMillan, April D, Johnson, Arvid C, Everleigh, Carl A, & Moorhead, Arthur J. Radio-frequency and microwave load comprising a carbon-bonded carbon fiber composite. United States.
Lauf, Robert J, McMillan, April D, Johnson, Arvid C, Everleigh, Carl A, and Moorhead, Arthur J. Thu . "Radio-frequency and microwave load comprising a carbon-bonded carbon fiber composite". United States. https://www.osti.gov/servlets/purl/871489.
@article{osti_871489,
title = {Radio-frequency and microwave load comprising a carbon-bonded carbon fiber composite},
author = {Lauf, Robert J and McMillan, April D and Johnson, Arvid C and Everleigh, Carl A and Moorhead, Arthur 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.},
doi = {},
url = {https://www.osti.gov/biblio/871489}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

Patent:

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