Content deleted Content added
m Jamiebuba moved page Standard linear array to Draft:Standard linear array: Not ready for mainspace, incubate in draftspace (via script) |
AFC draft (via script) |
||
Line 1:
{{AfC submission|t||ts=20220319212713|u=Bluegold92|ns=118|demo=}}
A standard linear array (SLA) is a linear array of interconnected transducer, e.g. microphone or antenna, elements where the individual elements are arranged in a straight line spaced at one half of the wavelength of the intended signal to be received and/or transmitted. The reason for this spacing is that it prevents [[grating lobes]] in the [[visible region]] of the array. Intuitively one can think of a linear array of elements as spatial sampling of a signal in the same sense as time sampling of a signal. Per Shannon's [[sampling theorem]], the sampling rate must be at least twice the highest frequency of the desired signal. The analog of radian frequency in the time ___domain is [[wavenumber]] in the spatial ___domain. Wavenumber, <math>k = \frac{2\pi}{\lambda}</math> radians per meter. Therefore the spatial sampling rate, in samples per meter, must be <math>\geq 2 \times \frac{k}{2\pi}</math>. Therefore the sampling interval, in meters per sample, must be <math>\leq \frac{\lambda}{2}</math>.
{{Drafts moved from mainspace|date=March 2022}}
| |||