Professional Group Ell (Antennas and Propagation) sponsored by IRE Professional Groups on Antennas and propagation. sponsored by IRE Professional Group on Antennas and Propagation. IRE Professional Group on Antennas and Propagation. organised by Professional Group E13 (Optics and Infra-Red). organised by Professional Group ELL (Antennas and Propagaation),Electronics Division, IEE. orgnised by Professional Group C2 (Control Methods and Computing) organised by Professional Group C6 (Microprocessor Applications) organised by Professional Group E10 (Circuit Theory & Design) organised by Professional Group C9 (Components for Computing & Control)