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).