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BASIC ANTENNA THEORY . An antenna is a device that provides a transition between electric currents on a conductor and electromagnetic waves in space. A transmitting antenna transforms electric currents into radio waves and a receiving antenna transforms an electromagnetic field back into electric current.
23 gru 2015 · Addeddate 2015-12-23 16:29:19 Identifier Antenna.Theory.Analysis.and.Design3rd.Edition Identifier-ark ark:/13960/t8nc9tv64 Ocr
1. Definition of the Antenna and Wave-Motion The radio antenna may be defined as the interface between a circuit in which electrical power is constrained to follow conducting paths, and electromagnetic radiation travelling freely through space. The antenna may convert power in the circuit into radiated energy or vice versa, forming either
The third editionof Antenna Theory is designed to meet the needs of electrical engi- neering and physics students at the senior undergraduate and beginning graduate levels, and those of...
An antenna can be defined in the following different ways: 1. An antenna may be a piece of conducting material in the form of a wire, rod or any other shape with excitation. 2. An antenna is a source or radiator of electromagnetic waves. 3. An antenna is a sensor of electromagnetic waves. 4. An antenna is a transducer. 5.
• Review of basic antenna types • Radiation pattern, gain, polarization • Equivalent circuit & radiation efficiency • Smart antennas • Some theory • Summary
The third edition of Antenna Theory is designed to meet the needs of electrical engi- neering and physics students at the senior undergraduate and beginning graduate levels, and those of practicing engineers.
