Reconstructing Nonlinearities with Intermodulation Spectroscopy

Reconstructing nonlinearities with intermodulation spectroscopy.

We describe a method of analysis which allows for reconstructing the nonlinear disturbance of a high Q harmonic oscillator. When the oscillator is driven with two or more frequencies, the nonlinearity causes intermodulation of the drives, resulting in a complicated spectral response. Analysis of this spectrum allows one to approximate the nonlinearity. The method, which is generally applicable ...

Communication Nonlinearities Techniques for Analysis of Passive Intermodulation

This paper is concerned with characterisation of passive intermodulation (PIM) in distributed RF circuits and components with the aid of emerging nonlinear RF techniques. Conventionally, intermodulation (IM) is defined as a phenomenon which is characterised by the appearance of additional spectral components in the output spectrum of a nonlinear system different from the carrier frequencies. Th...

Intermodulation Distortion

Phase imaging with intermodulation atomic force microscopy.

Intermodulation atomic force microscopy (IMAFM) is a dynamic mode of atomic force microscopy (AFM) with two-tone excitation. The oscillating AFM cantilever in close proximity to a surface experiences the nonlinear tip-sample force which mixes the drive tones and generates new frequency components in the cantilever response known as intermodulation products (IMPs). We present a procedure for ext...

Analog Filter Banks with Low Intermodulation Distortion

It is demonstrated that the filter-bank structure of [1] can be designed to significantly reduce the effect of intermodulation distortion. This gives it an important advantage over other structures in radio systems. The principle is explained, and supported with Volterra analysis and simulation.