Methods of wavebeam phase front reconstruction using intensity measurements

Two methods for phase front reconstruction of paraxial linear polarized wav ebeams are presented. Both of them are based on wavebeam field intensity me asurements. The first method requires a reference wavebeam with known chara cteristics. The second one allows phase reconstruction using only wavebeam intensity measurements in a few cross sections. The methods described are s uccessfully applied in the millimeter range for wavebeam diagnostics in mod e converters, transmission lines and antenna elements. Since the methods ar e based on general principles they may be used not only for microwaves inve stigation.