Abstract
Parametric receivers, such as parametric sources, can obtain enhanced directivity via nonlinear mixing of a high intensity pump wave and an incoming signal wave. Receiver properties, such as directivity and sensitivity of a parametric receiving arrays, can be derived from the physical characteristics such as the separation distance of the pump and receive elements, the pump wave frequency, and the incoming signal wave frequency. The overall receiver characteristics are also dependent on the medium properties such as the acoustic nonlinear parameter and absorption, as the medium is key to mixing of the waves. The parametric receiver’s noise floor is a function the noise around the signal band and the noise native at the resultant sum and difference frequencies. This paper will present the analysis of noise for parametric receivers as well as modeling results leveraging a k-space pseudospectral method solver of the Westervelt equation. Comparisons of the directivity of the parametric receivers will be made between the modeling to the analytic theory.
Published Version
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