Ghulam Yameen Mallah; Mehboob Ali Jatoi; Izhar Ali Amur; Munwar Ayaz Memon; Muzaffar Bashir Arain. EXACT SOLUTION OF PLANE WAVE DIFFRACTION IN SEMI INFINITE PARALLEL PLATE WAVEGUIDES USING THE MATRIX WIENER-HOPF EQUATION. PRJ 2026, 4, 827-838.