ELE5PMC Lecture Notes - Antenna Aperture, Antenna Efficiency, Azimuth

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Antennas are devices that are capable of launching rf (radio frequency) energy into space and detect it as well. How well an antenna is able to launch rf energy and how well it can detect, depends on some important parameters that will be introduced here. Many people find it hard sometimes to understand some or all of these parameters, but i have found out that explanations with examples can help. I have tried my best to choose the examples close to the concepts. This lecture note does not contain any mathematical formulae, instead i have concentrated on only the concepts of antennas. Mathematical considerations will be dealt in the following lecture notes. To understand this, check out the picture of the leaf below. The leaf can be thought equivalent to an antenna, the ripples are the radiation & the circular nature of ripples is the radiation pattern.

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