A Method to Quantify the Radiation Characteristics of an Unknown Interference Source

One of 51 reports in the series: NBS Technical Note available on this site.

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Description

From introduction: A new method for determining the radiation characteristics of leakage from electronic equipment for interference studies is described in this report. Basically, an unintentional leakage source is considered to be electrically small, and may be characterized by three equivalent orthogonal electric dipole moments and three equivalent orthogonal magnetic dipole moments. When an unknown source object is placed at the center of a transverse electromagnetic (TEM) cell, its radiated energy couples into the fundamental transmission mode and propagates toward the two output ports of the TEM cell. With a hybrid junction inserted into a loop connecting the cell output ... continued below

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54 p. : ill. ; 28 cm.

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Ma, Mark T. & Koepke, Galen H. October 1982.

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  • Main Title: A Method to Quantify the Radiation Characteristics of an Unknown Interference Source
  • Series Title: NBS Technical Note
  • Added Title: National Bureau of Standards Technical Note 1059

Description

From introduction: A new method for determining the radiation characteristics of leakage from electronic equipment for interference studies is described in this report. Basically, an unintentional leakage source is considered to be electrically small, and may be characterized by three equivalent orthogonal electric dipole moments and three equivalent orthogonal magnetic dipole moments. When an unknown source object is placed at the center of a transverse electromagnetic (TEM) cell, its radiated energy couples into the fundamental transmission mode and propagates toward the two output ports of the TEM cell. With a hybrid junction inserted into a loop connecting the cell output ports, one is able to measure the sum and difference powers and the relative phase between the sum and difference outputs. Systematic measurements of these powers and phases at six different source object positions, based on a well-developed theory, are sufficient to determine the amplitudes and phases of the unknown component dipole moments, from which the detailed free-space radiation pattern of the unknown source and the total radiated power can be determined. Results of simulated theoretical examples and an experiment using a spherical dipole radiator are given to illustrate the theory and measurement procedure.

Physical Description

54 p. : ill. ; 28 cm.

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Digitized from microfiche (1).

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  • October 1982

Added to The UNT Digital Library

  • Jan. 27, 2017, 10:19 a.m.

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  • Feb. 28, 2017, 8:17 a.m.

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Ma, Mark T. & Koepke, Galen H. A Method to Quantify the Radiation Characteristics of an Unknown Interference Source, report, October 1982; Washington D.C. (digital.library.unt.edu/ark:/67531/metadc502566/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.