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Search Publications by: John Ladbury (Fed)

Displaying 126 - 150 of 154

Directivity of the Test Device in EMC Measurements 1

December 1, 2000

Author(s)

Galen H. Koepke, David A. Hill, John M. Ladbury

We present a statistical theory for estimating the directive characteristics of unintentional emitters based on the electrical size of the device. We compare this theory to directivity derived from pattern measurements in an anechoic chamber. We also use

Radiated Power Measurements in Reverberation Chambers

December 1, 2000

Author(s)

Galen H. Koepke, John M. Ladbury

The electromagnetic reverberation chamber is widely used as a test facility to generate complex fields for interference and compatibility measurements. The chamber is also effective as a method to quantify the total radiated power from an emitter

Reverberation Chamber Verification Procedures on How to Check if Your Chamber Ain't Broke and Suggestions on How to Fix It If It Is

August 1, 2000

Author(s)

John M. Ladbury

We present three tests for evaluating the agreement between measurements taken in a reverberation chamber and the expected results given by simple statistical models. We then apply these tests to a chamber that is known to be sub-optimal. We also give

Test Device Directivity for EMC Measurements

August 1, 2000

Author(s)

Galen H. Koepke, David A. Hill, John M. Ladbury

Monte Carlo Simulation of Reverberation Chamber

October 1, 1999

Author(s)

John M. Ladbury

This paper describes how to simulate a reverberation chamber using a uniform random number generator and mathematical manipulation.

Reverberation Chamber Relationships: Corrections and Improvements or Three Wrongs Can (Almost) Make a Right

August 1, 1999

Author(s)

John M. Ladbury, Galen H. Koepke

We correct a number of errors that have crept into the reverberation-chamber literature over the past several years.

Evaluation of the NASA Langley Research Center Mode-Stirred Chamber Facility

January 1, 1999

Author(s)

John M. Ladbury, Galen H. Koepke, Dennis G. Camell

We performed extensive tests on three mode-stirred (reverberation) chambers operated by the High Intensity Radiation Laboratory located at the National Aeronautics and Space Administration Langley Research (NASA/LaRC) in Hampton, VA.