An airplane flying in the sky uses an antenna to communicate with air traffic control tower locating 20 km (point-to-point distance) away from the airplane. The antenna has a time-averaged total power of 50 kW and works at the frequency of 118 MHz. Assume the radiation intensity of the antenna is uniform in all directions. Determine the amplitude of the electric field signal received by the control tower.

Q: . What do you mean by aperture antenna? Explain the construction, working principle and the feeding…

A: An aperture antenna is a type of antenna where the size of the antenna is significantly larger than…

Q: What will be the radiation resistance of a hertzian dipole antenna of quarter wavelength?

A: The Hertzian dipole antenna is a special type of dipole antenna which is used as a reference antenna…

Q: 5. What does the height of the antenna above ground affect? A. Radiation resistance B. Radiation…

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Q: Assuming a constant antenna size, how would the radar beamwidth change if the frequency increases…

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Q: 9. Radiation intensity is the Power radiated from an antenna per unit solid angle . a) True b) False…

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Q: 6 Power received. Calculate the power received at 100 km distance if a wave originates from the…

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Q: How is aperture type of antennas different from the conventional antennas? Explain the theory of…

A: The objective of the question is to understand the difference between aperture type of antennas and…

Antenna Characteristics

The antenna is an important concept in the domain of electronics and communication engineering. An antenna forms an integral part of many commonly used devices such as wireless modems, routers, game controllers, mobile phones, bluetooth devices, and so on. In simple terms, any wireless communication makes use of antennas to serve the purpose. An antenna, also known by the term 'arial', is an electrical device that converts electrical signals into electromagnetic waves or electromagnetic waves into electrical signals. An antenna contains a transmission line usually made up of co-axial cable, it then receives the signals and converts them into electromagnetic waves, which are then transmitted via space into their required destination. A communication system essentially makes use of two antennas, a transmission antenna, which converts electrical signals into electromagnetic waves, and a receiving antenna, which receives the electromagnetic waves and converts them back into electrical signals.