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1) A directivity is a measure of the concentration of radiation in a particular direction from an antenna, while maximum power gain is the ratio of the intensity in a given direction to the average intensity. 2) An atmosphere duct is a layer in the troposphere where the refractive index increases with altitude, capable of guiding radio waves and causing extended-range propagation. 3) Lens antennas concentrate the radio waves from multiple feed elements to provide directional transmission, with advantages
- Author
- AmaniChimata
- Language
- EN