Study of the spectral characteristics of the Scattering of MOM-structures in non-linear locations

Abstract

The reliability of non-linear junction detectors (NLJD) at detection of radio-electronic devices (RD) and scatterers of corrosion origin of the type “metal-oxide-metal” (MOM-structures) is investigayed. It is revealed that the presence of MOM-structures in the study space substantially impair the reliability of NLJD at revealing RD with the “small” non-linear effective area of dispersion (NEAD) of the probing signal. In this case determination of threshold levels of multiple harmonics and their ratios will not improve the efficiency of the NLJD use, which is associated with the peculiarities of MOM-structures current-voltage characteristics (CVC). The contacts between the metals Al, Cr, Ni have CVC with asymmetry, which are determined by the thickness and area of the oxide. The asymmetry can be of two types – positive and negative, have a clear and quasi-clear manifestation. It is shown that the choice of the optimal threshold ratio ensures the reliability of NLJD only upon detection of MOM-structures with quasi-clear CVC asymmetries of two types. In the case of MOM-structures with a clear CVC asymmetry of two types, the efficiency of the use of NLJD initially requires a significant decrease of levels of spurious emissions of the transmitting antenna.