No abstract

We solve a new canonical problem: that of a plane wave obliquely incident on an anisotropic imperfectly conducting half plane. An exact closed-form solution is obtained by factorizing a 2 × 2 Wiener–Hopf matrix. The problem had earlier been considered insoluble, but yields to a combination of new and old matrix-factorization techniques.

This contribution is a tutorial introduction to the phenomenological theory of radar polarimetry for the coherent scatter case emphasizing monostatic backscattering and forward scattering (transmission).Characteristic similarities and differences between radar polarimetry and optical polarimetry and the role of linear and antilinear operators (time-reversal) are pointed out and typical polarimetric invariants are identified.

E. ; HURD, R. A. Two Waveguide Bifurcation Problems Wir betrachten die Beugung der Grundwelle i n einem Parallelplattenwellenleiter mit schallweichen und harten Randbedingungen an einer zentrierten Halbebene, auf deren beiden Seiten schallweiche und h r t e Randbedingungen herrschen. Eine geschlossene Losung des sich ergebenden gekoppelten Wiener-Hopf-Systems wird hergeleitet. Die Modenaqdituden in allen drei Cebieten werden berechnet, und die Relativleistung der Moden niederer Ordnung wird graphisch in Abhangigkeit vom Plattenabstand dargestellt. We consider the diffrraction of the dominant wawe mode in a parallel p2ate waveguide with hard and soft bozlndaries incident on a centred half plane on whose two faces hard and soft boundary conditions obtain. A closed form solution of the resulting coupled Wiener-Hopf system is derived. The modal amplitudes in all three regions are calculated and the relative powers of the low order modes versus the plate spacing are displayed graphically. TnepabiMM rpaHasHbiMII YCJIOBHIIMEI y 1tempMpoBamoCi noaynnocKocTn, c o6em CTOPOH ~B Y K O M R~K I I~ PI OrMaTpMBaeM nII4paHUMH, OCHOBHOg BOJIIIM B IIJIaCTLIII4aTaR B0JIHOBOil;IIaH JIMH3a C 3BYKOMHrKMMH II TUepAbIe IIOrpaHMsHbIe YCJIOBMR CY4eCTBYM)T. BhIBeJIH 3aMKHYTOe PeIUeHMe BbITeKaIoQea CMCTeMbI BmHepa M XOII@a. B6IqHCJIflIoT aMIIJlMTyA TMIIOB BOJIH XJIR BCeX TPeX 06naCTefi. nOKa3bIBaIoT C IIOMOLt[bIo rpa@MHM OTHOCMTeJIbHbIfi MOIIIHOCTb BMAOB BOjrII IIH3KOrO IIOpHHKa B BaBHCUMOCTM OT PBCCTOFIHMFI IIJIMT.

We consider the diffraction of a plane wave by an infinite set of parallel equidistant half planes. On each plate the total field vanishes on one side, and the normal derivative vanishes on the other side. A closed‐form solution to this new canonical diffraction problem is presented for Bragg angle incidence.