The physical optics approximation is widely used in analysis of antennas and scattering problems for electromagnetic and acoustic waves. The present paper investigates the nature of this classical… Expand

This paper contains brief comments on the Physical Theory of Diffraction (PTD). It describes its origination, development, and gives examples of engineering applications. The paper highlights basic… Expand

The weak-form of Helmholtz differential equation, in conjunction with vector test-functions (which are gradients of the fundamental solutions to the Helmholtz differential equation in free space) is… Expand

Basic features of the modified theory of physical optics (MTPO) are discussed on the example of scattering at perfectly reflecting half-planes and wedges. It is shown that violations of the… Expand

─ The paper examines diffraction at rounded wedges with perfectly conducting faces. This topic was a subject of many publications which investigated mainly the total diffracted waves. In the present… Expand

In the above paper U. Jakobus and F. M. Landstorfer (see ibid., vol.43, p.1123-9, Oct. 1995) state that their approach is opposed to the physical theory of diffraction (PTD), which, according to… Expand