HAM Radio

HAM Radio

Recently HAM (amateur) radio operators have volunteered to help a special task force that has been constituted in Bengaluru to ensure that citizens placed under home quarantine follow the protocol for it.

ImpPoints

Amateur radio, also called ham radio, is a noncommercial two-way radio communications. They use many frequency bands across the radio spectrum.
HAM radio is a real-time communication network. This is much like wireless communication which is quick and transparent.
Amateur Radio operators set up and operate organized communication networks locally for governmental and emergency officials, as well as non-commercial communication for private citizens affected by the disaster.
Amateur Radio operators are most likely to be active after disasters that damage regular lines of communications due to power outages and destruction of telephone, cellular and other infrastructure-dependent systems.

Indian Scenario

According to the Indian Wireless Telegraphs (Amateur Service) Amendment Rules, 1984, ‘Amateur service’ means a service of self training intercommunications and technical investigation carried on by Amateurs that is, by persons duly authorized under these rules interested in radio technique solely with a personal aim and without pecuniary interest.
It is a non-commercial radio communication service.
Amateur radio operators are commonly known as hams. The term “Ham radio” is used to describe the hobby of Amateur radio and not the equipment.
- Similarly the term “Ham” is used to describe a radio amateur enthusiast and not the equipment.
Any citizen of India who is above 12 years of age can become a ham by qualifying in the Amateurs Station Operators’ examination (ASO) and obtaining a valid Amateur wireless telegraph station license.

Radio Waves

Radio waves have the longest wavelengths in the electromagnetic spectrum.
These were discovered by Heinrich Hertz in the late 1880s.
These are produced by the accelerated motion of charges in conducting wires. They are used in radio and television communication systems.
They are generally in the frequency range from 500 kHz to about 1000 MHz.
The AM (Amplitude Modulated) band is from 530 kHz to 1710 kHz. The FM (Frequency Modulated) radio band extends from 88 MHz to 108 MHz.
Higher frequencies up to 54 MHz are used for short wave bands. TV waves range from 54 MHz to 890 MHz.
Cellular phones use radio waves to transmit voice communication in the Ultra High Frequency (UHF) band.
Radio-wave communications signals travel through the air in a straight line, reflect off of clouds or layers of the ionosphere, or are relayed by satellites in space.

Source: PIB

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