When an antenna is transmitting an unmodulated carrier, then the current is 10 amps and when the antenna is transmitting amplitude modulated signal, then the current is 15 amps. Estimate the modulation index. Round the answer to the nearest tenth.

Q: Figure 1 shows a signal obtained after amplitude modulation by a sinusoidal message. The carrier…

A: Step 1: Step 2: Step 3: Step 4:

Q: Identify the mathematical operation performed by an amplitude modulator (AM). Division…

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A: It is given that:

Q: 1. An FM signal has a maximum frequency deviation of 25kHz and is modulated by a sine wave with a…

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Q: Determine the Bandwidth of a FM wave when the maximum deviation allowed is 75KHZ and the modulating…

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Q: Question: The maximum deviation allowed in an FM broadcast system is 75 kHz, If the modulating…

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Q: 2. An FM signal expressed as M() = 1000cos@0r107)+0.25sin(4x10') is measured across a 502 antenna.…

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Q: b) Double-Sideband Amplitude Modulation (or DSB-AM) is one of the simplest modulation schemes used…

A: i) We need to draw a DSB-AM waveform in the time domain, identifying any key features. ii) We need…

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.