Dipole Moments of Weak, Electrically Small Emitters from TEM-Cell Measurements
David A. Hill, Kenneth H. Cavcey
This report presents a new method for determining the equivalent electric and magnetic dipole moments of an electrically small emitter from TEM-cell measurements. The electric dipole moments are determined from open-circuit measurements, and the magnetic dipole moments are determined from short-circuit measurements. The method has the advantages of simplicity in separating the electric and magnetic dipole emissions and increased sensitivity resulting from the in-phase reflection from the open- or short-circuited port. The method has been used on two commercial electronic timers, and in both cases the electric dipole moment was measurable, but the magnetic dipole response was below the noise floor. These results have practical application to the problem of detection of electronic bomb detonators.
and Cavcey, K.
Dipole Moments of Weak, Electrically Small Emitters from TEM-Cell Measurements, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD
(Accessed June 7, 2023)