Hi,

I've defined two linear transducers (2D) for plane-wave propagation.

The first one is defined in the horizontal and the second one in vertical direction.

If I transmit a plane-wave with the horizontal transducer and receive the signals with both, then I have a large frequency-shift in the spectrum.

Input-Signal: Gaussian-envelope, 3 cycles and centered at 5.2MHz

(max supported frequency of the grid ~8.3MHz)

Spectrum of horizontal transducer: Gaussian-curve centered at ~5.2MHz

Spectrum of vertical transducer: Gausian-curve shifted to 1.5 - 2.5MHz (channel dependent)

Where does this large shift come from?

Any suggestion?

Thanks,

Valentin