Antenna principlespotential functions and electromagnetic field current elements radiation from monopole and wave dipole network theorems directional properties of dipole antenna antenna gain effective area antenna terminal impedance antenna as an opened out transmission line practical antennas and methods of excitation transmission loss between antennas antenna temperature and . Antennas wave and propagation 1 antennas and propagation key points 2 2 introduction an antenna is a transducer that converts radio frequency electric current to electromagnetic waves that are radiated into space in two way communication the same antenna can be used for transmission and reception 3. Unit viii wave propagation ii antenna and wave propagation pdf sky wave propagation introduction structure of ionosphere refraction and reflection of sky waves by ionosphere ray path critical frequency muf luf of virtual hlght and skip distance relation between and skip distance multi hop propagation energy loss in ionosphere. Antennas and wave propagation is written for the first course on the same the book begins with an introduction that discusses the fundamental concepts notations representation and principles that govern the field of antennas
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