Transverse and longitudinal noise
L.K.J. Vandamme, L. P. J. Kamp · Journal of Applied Physics · 1979
Analytic functions are derived for the spectral noise voltage density between two circular sensor electrodes on a two-dimensional isotropic conductor, placed either transversely or longitudinally to a homogeneous electric field. The sensor electrodes are far removed from both the bias electrodes and the boundaries. The relations have been checked experimentally for 1/f conductivity fluctuations. Both the transverse and longitudinal noise are proportional to I−2ℱs(J⋅J̃)2 ds where J⋅J̃ represents the dot (scalar) product of the homogeneous current density J and the adjoint current density J̃, and the current through the bias electrodes is I. It is found that the transverse noise is somewhat smaller than the longitudinal noise.