Application of the Window Function in the Plane Wave Synthesis Technique

The cosine window function is introduced and applied in the plane wave synthesis technique. With the infinite long current filament as the scanning probe, the plane wave synthesis technique is computer simulated. The calculation results show that in the plane wave synthesis technique, the uniform degree of the amplitude and phase of the quasi-plane wave synthesized in the body under test zone can be improved greatly by weighting process of the current distribution of the array elements with the cosine window function, which proves the validity and applicability of the weighting method by means of the cosine window function in the plane wave synthesis technique.