Radio Receiver

Antennas have been an integral part of machines which we use pretty much all the time. We first saw them on radios, and then we saw ‘rabbit ears’ sitting on top of the television when it first came out, and then when cable television came into being, we saw giant satellite dishes with antennas on the roofs of buildings. There are even antennas on cell phones, although nowadays mainstream phones have the antenna on the inside of the device. Therefore, most people know that the antennas are pretty important to the operation of these machines. What they don’t know is that antennas come packaged with another device, without which they are absolutely useless: a radio receiver.

A radio receiver is a device made from an electronic circuit. Its basic job is to receive the signals picked up by the antenna. However, the antenna receives a very large number of signals, radio and micro waves, that are being transmitted from various outputs at all times. It is the radio receiver’s job to pick out the relevant signals from among them. To do so, it uses an electrical filter, and them amplifies the signal it has separated. This amplification allows it to decode the signal into a form which consumers can use, such as music, pictures, digital data, measurement values, and even navigational positions.

Radio receivers are used in a wide range of devices. They are used by consumers on a wide scale in the afore-mentioned televisions and cell phones. Audio enthusiasts use them in stereos and home theatre systems, which have high fidelity audio receivers. The common term for these is Hi-fi receivers, which reproduce sound and pictures as faithfully as can be achieved by the technology. Hi-fi receivers have minimum distortion and accurate frequency response, which makes the output as near to the original performance as possible in terms of quality.

Another very widespread use of radio receivers is in portable radios. These radios or ‘boom boxes’ as they are known are capable of playing radio broadcasts at a very high volume. Portable mp3 players and DVD players also have radio receivers which give them the same capabilities. Even car entertainment systems have radio receivers, a highly useful feature which allows people riding in cars to catch up on the latest news and music. These radio receivers are typically built to receive FM, AM and shortwave broadcast bands.

Communication receivers are used for stable communication links, and also for remote control. They can be found in the market for hobbyists who enjoy building their own amateur radios. Satellite television utilizes radio receivers, using communication satellites and a satellite dish. Communication satellites use radio receivers to relay radio and micro waves to satellite dishes, which in turn use radio receivers to convert the signals to usable forms. This technology is also used for ship to ship communications, submarine communications, in planes and other vehicles, as well as for broadcasting television and radio channels.

Telemetry, a method of measuring information from a distance using radio systems, uses radio receivers for finding information that is now essential for our everyday life. Wireless weather stations use radio receivers when reporting on storms, snow and rainfall, data which is needed for proper irrigation of crops and preventing crop diseases. They are also used in managing water supply systems, to detect leaks and monitoring groundwater. Spacecraft and satellites use radio receivers when they gather data which they send to NASA and other agencies to analyze. Energy consumption is also monitored and recorded using radio receivers, which allows decisions on the most efficient allocation of energy to be taken.

This Radio Receiver Review is Written/Updated on Nov 18th, 2010 and filed under Consumer Electronics. Both comments and pings are currently closed.

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