3. Consider a commercial InGaAs pin photodiode whose responsivity is shown in the Figure. Its dark current is 3.5nA. Answer the following. a) Calculate the incident optical power required to produce a photo generated current of thrice of the dark current when a wavelength of 1700nm is incident on the photodiode. And then calculate the QE of the photodetector at 1700nm?

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A:

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Q: 7. Which chapter of the National Electrical Code covers communications systems installations and…

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Q: 19. The voltage regulation of an alternator havings 0.75 leading p.f. load, no-load induced e.m.f of…

A:

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A:

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.