Question

In: Electrical Engineering

Why we need high gain Receiver RF Amplifier? Justify with an example.

Why we need high gain Receiver RF Amplifier? Justify with an example.

Solutions

Expert Solution


VLF wave which is also known as myriametre wave is naturally generated by a variety of natural phenomena. Lightning is one of the phenomena that generates VLF wave dominantly in nature. VLF wave can also be produced electronically by human where it has been recently applied for numerous applications such as for radio service navigation and military communication. The wave which is in the frequency range of 3-30kHz has the capability to achieve very long distance and easily affected by the condition of ionosphere. However, the use of such common antenna will not be effective since the wavelength is of 10km to 100km.
Moreover, to compensate an unavoidable matter in?uenced by natural phenomena, a high performance equipment is de?nitely
required for VLF wave communication.
It is already well-known that wireless communication using VLF wave is very important especially in submarine communications. In addition, VLF wave is also implemented for weather observation and research that uses electromagnetic wave. Atmospheric, Weather, Electromagnetic System for Observation,
Modeling, and Education (AWESOME) is one of the research Projects that has VLF wave transmitter spread around the world.

Reliability of communication by using VLF wave is certainly important so that the research can be run properly.
In order to maintain the reliability of communication using
VLF wave, an RF ampli?er is one of the essential devices
required for the communication. It is signi?cant to ensure
that VLF wave signals arriving at the VLF receiver can be
processed further without defecting the contained information
inside the signals. Thus, the ampli?er with high-gain and low-
noise capability will be required to support the transceiver
system in VLF wave communication.


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