Transmission and Propagation

Radiation Mechanism ¿ single wire, 2 wire, dipoles, Current Distribution on a thin wire antenna. Antenna Parameters - Radiation Patterns, Patterns in Principal Planes, Main Lobe and Side Lobes, Beam-widths, Polarization, Beam Area, Radiation Intensity, Beam Efficiency, Directivity, Gain and Resolution, Antenna Apertures, Aperture Efficiency, Effective Height, illustrated Problems. Introduction, Traveling wave radiators ¿ basic concepts, Long wire antennas ¿ field strength calculations and patterns, Micro-strip Antennas-Introduction, Features, Advantages and Limitations, Rectangular Patch Antennas ¿ Geometry and Parameters, Impact of different parameters on characteristics. Broadband Antennas: Helical Antennas ¿ Significance, Geometry, basic properties; Design considerations for monofilar helical antennas in Axial Mode and Normal Modes (Qualitative Treatment).