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Title: Low reflectance radio frequency load

Abstract

A load for traveling microwave energy has an absorptive volume defined by cylindrical body enclosed by a first end cap and a second end cap. The first end cap has an aperture for the passage of an input waveguide with a rotating part that is coupled to a reflective mirror. The inner surfaces of the absorptive volume consist of a resistive material or are coated with a coating which absorbs a fraction of incident RF energy, and the remainder of the RF energy reflects. The angle of the reflector and end caps is selected such that reflected RF energy dissipates an increasing percentage of the remaining RF energy at each reflection, and the reflected RF energy which returns to the rotating mirror is directed to the back surface of the rotating reflector, and is not coupled to the input waveguide. Additionally, the reflector may have a surface which generates a more uniform power distribution function axially and laterally, to increase the power handling capability of the RF load. The input waveguide may be corrugated for HE11 mode input energy.

Inventors:
;
Publication Date:
Research Org.:
Calabazas Creek Research, Inc., San Mateo, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1128701
Patent Number(s):
8,686,910
Application Number:
12/758,614
Assignee:
Calabazas Creek Research, Inc. (San Mateo, CA)
DOE Contract Number:  
SC0001930
Resource Type:
Patent
Resource Relation:
Patent File Date: 2010 Apr 12
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Ives, R. Lawrence, and Mizuhara, Yosuke M. Low reflectance radio frequency load. United States: N. p., 2014. Web.
Ives, R. Lawrence, & Mizuhara, Yosuke M. Low reflectance radio frequency load. United States.
Ives, R. Lawrence, and Mizuhara, Yosuke M. 2014. "Low reflectance radio frequency load". United States. https://www.osti.gov/servlets/purl/1128701.
@article{osti_1128701,
title = {Low reflectance radio frequency load},
author = {Ives, R. Lawrence and Mizuhara, Yosuke M},
abstractNote = {A load for traveling microwave energy has an absorptive volume defined by cylindrical body enclosed by a first end cap and a second end cap. The first end cap has an aperture for the passage of an input waveguide with a rotating part that is coupled to a reflective mirror. The inner surfaces of the absorptive volume consist of a resistive material or are coated with a coating which absorbs a fraction of incident RF energy, and the remainder of the RF energy reflects. The angle of the reflector and end caps is selected such that reflected RF energy dissipates an increasing percentage of the remaining RF energy at each reflection, and the reflected RF energy which returns to the rotating mirror is directed to the back surface of the rotating reflector, and is not coupled to the input waveguide. Additionally, the reflector may have a surface which generates a more uniform power distribution function axially and laterally, to increase the power handling capability of the RF load. The input waveguide may be corrugated for HE11 mode input energy.},
doi = {},
url = {https://www.osti.gov/biblio/1128701}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 01 00:00:00 EDT 2014},
month = {Tue Apr 01 00:00:00 EDT 2014}
}

Works referenced in this record:

Seeded flame microwave power load
patent, December 1977


Waveguide
patent, April 1987


Millimeter wave variable width waveguide scanner
patent, May 1994


High power water load for microwave and millimeter-wave radio frequency sources
patent, September 1999


High Power Disk Loaded Guide Load
conference, January 2005