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Radio Waves: Difference between revisions
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In order to receive radio signals, for instance from AM/FM radio stations, a radio antenna must be used. However, since the antenna will pick up thousands of radio signals at a time, a radio tuner is necessary to tune in a particular signal. This is typically done via a resonator (in its simplest form, a circuit with a capacitor, inductor, or crystal oscillator, but many modern radios use Phase Locked Loop systems). The resonator is configured to resonate at a particular frequency, allowing the tuner to amplify sine waves at that radio frequency and ignore other sine waves. Usually, either the inductor or the capacitor of the resonator is adjustable, allowing the user to change the frequency at which it resonates. | In order to receive radio signals, for instance from AM/FM radio stations, a radio antenna must be used. However, since the antenna will pick up thousands of radio signals at a time, a radio tuner is necessary to tune in a particular signal. This is typically done via a resonator (in its simplest form, a circuit with a capacitor, inductor, or crystal oscillator, but many modern radios use Phase Locked Loop systems). The resonator is configured to resonate at a particular frequency, allowing the tuner to amplify sine waves at that radio frequency and ignore other sine waves. Usually, either the inductor or the capacitor of the resonator is adjustable, allowing the user to change the frequency at which it resonates. | ||
The human body is a crystal oscillator and frequency resonator which unconsciously picks up and absorbs many different [[Radio Waves]]. | The human body is a crystal oscillator and frequency resonator which unconsciously picks up and absorbs many different [[Radio Waves]], depending on what station of [[Frequency]] and [[consciousness]] that person is tuned in to. | ||
==Radio Frequency== | ==Radio Frequency== | ||
[[File:Cont emspec2.jpg|thumb|Electromagnetic Spectrum]] | [[File:Cont emspec2.jpg|thumb|Electromagnetic Spectrum]] | ||
We need to understand the [[Spectrum of Frequency]] in the [[Electromagnetic Wave Spectrum]] and to be aware of radio frequency (RF) energy to help protect ourselves from harassment by understanding what is being transmitted into the environment. Radio waves are received and transmitted by antennas, and are often tuned by length. As an example, AM radio frequencies are so long that an antenna 100 feet long isn't long enough for it's wavelength. When you look at a television antenna on a roof top, you are seeing a much shorter antenna, simply because the frequencies range from 50MHz to about 800MHz, or just under the analog cell phone frequency. | We need to understand the [[Spectrum of Frequency]] in the [[Electromagnetic Wave Spectrum]] and to be aware of radio frequency (RF) energy to help protect ourselves from harassment by understanding what is being transmitted into the environment. Radio waves are received and transmitted by antennas, and are often tuned by length. As an example, AM radio frequencies are so long that an antenna 100 feet long isn't long enough for it's wavelength. When you look at a television antenna on a roof top, you are seeing a much shorter antenna, simply because the frequencies range from 50MHz to about 800MHz, or just under the analog cell phone frequency. | ||