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dg Radio
oT: t[STwEBLyfBAiWikipediajx Source: Wikipedia The Free Encyclopedia (Wikipedia),
dg ijA dggigjwB Radio (spread), the low frequencies from the light of electromagnetic waves (long wavelength to other words) the points. dggO iO jAgB Infrared low frequency radio waves provide most of the properties of light (or infrared) is called with less frequency than that. lA`dB To sound like a nature to spread the space.
dg@21dguOSKwcgdgv`B Act 2 radio airwaves in Article 1 "of electromagnetic waves of frequencies below 103 MEGAHERUTSU" definition. 3,000,000 MHz = 3,000 GHz = 3 THzB 3,000,000 MHz = 3,000 GHz = 3 THz. AdggdgEiAgjBB However, if the boundary to distinguish from the other only by the electromagnetic wave frequency (in particular, the maximum frequency) is ambiguous. A M i M jpdgwAxB In a small dictionary, communication (radio communication) found that the position of the electromagnetic waves used for point and are generally not much support.
IdgdgwpAiqjgigjAZpIpB In physical terms and that also points to a band of electromagnetic waves and optical properties of light (the particle) nature of a wave (wave nature) with the use or the nature of the technical I may have to separate. dgVw@dgAgB And radio astronomy as a radio or by the method of measurement, it is handled as an optical frequency band. AgZpW]Ogwe_CMB The development of conventional high-frequency technology by allowing heterodyne receiver system to the frequency domain were considered far-infrared region.
[ W ] pr Applications
B Is the following.
- ME Telecommunications
- erWI ingAqj Broadcasting of radio and television (and that of terrestrial and some satellite)
- pM: x@ A hE~}A D A q For wireless communication services: police and emergency medical fire, marine, traffic control and air
- A}`AM: A}`A A soh A p[\i Amateur radio communications: ham radio, citizens band, and wireless personal
- db: gdbEPHS i dCM jA }``lANZX A CXdb Phone: Phone mobile PHS (telecommunications Electronics), multichannel access radio, telephone wireless
- f[^ Handset data
- u Teleoperation
- Rdq@MA WRRg[[{MB Communication to the remote control electronic communication to the main controller in a radio-controlled toys.
- u Position measurement
- M Heating
- dqW : }CNgM Microwave: heat-wave micro -
- p The use of reflection
[ W ] dgdXyNg spectrum of electromagnetic waves
ggdggB The corresponding electromagnetic wave frequency and is divided into the following frequency bands.
| g Frequencies | Abbreviation | ITU ITU standards | gg Frequency and wavelength | pr Applications |
|---|---|---|---|---|
| 3 Hz 3 Hz below 100,000 km 100,000 km or more | ||||
| Extremely low frequency Extremely low frequency | ELF ELF | 1 1 | 3–30 Hz 3-30 Hz 100,000km – 10,000km 100,000 km - 10,000 km | M Submarine communication |
| g Very low frequency | SLF SLF | 2 Two | 30–300 Hz 30-300 Hz 10,000km – 1000km 10,000 km - 1000km | M Submarine communication |
| g Very low frequency pole | ULF ULF | 3 Three | 300–3000 Hz 300-3000 Hz 1000km – 100km 1000km - 100km | zRM Communication in Mine |
| g Very low frequency | VLF VLF | 4 Four | 3–30 kHz 3-30 kHz 100km – 10km 100km - 10km | MA r[R ASv A nw Submarine communications, beacons, and wireless heart rate, geophysics |
| g Wavelength | LF LF | 5 Five | 30–300 kHz 30-300 kHz 10km – 1km 10km - 1km | dgq@ A dgv A AMg Navigation radio, clock radio, AM broadcast wave |
| g Medium wave | MF MF | 6 Six | 300–3000 kHz 300-3000 kHz 1km – 100 m 1 km - 100 M | AM AM broadcasting |
| Zg Shortwave | HF HF | 7 7 | 3–30 MHz 3-30 MHz 100m – 10m 100m - 10m | Zg A A}`A Broadcast shortwave radio amateur |
| Zg Ultrashortwave | VHF VHF | 8 8 | 30–300 MHz 30-300 MHz 10m – 1m 10m - 1m | FM A er FM broadcasting, broadcast television |
| Zg Ultra High Frequency | UHF UHF | 9 Nine | 300–3000 MHz 300-3000 MHz 1m – 100 mm 1m - 100 mm | er A dqW A gdb A LAN A Bluetooth A GPS Broadcast television, microwave electronics, Telephone cellular, wireless LAN, Bluetooth, GPS |
| Z`[gg Cm waves | SHF SHF | 10 Ten | 3–30 GHz 3-30 GHz 100mm – 10mm 100mm - 10mm | LAN AV[_[ Wireless LAN, radar Latest |
| ~g Millimeter-wave | EHF EHF | 11 11 | 30–300 GHz 30-300 GHz 10 mm – 1mm 10 mm - 1mm | dgVw Ap Radio astronomy and broadcasting high-speed relay |
| 300 GHz 300 GHz or more 1mm Below 1mm |
[ W ] A See also
- dgg - A}`Ag Classification by frequency of radio - frequency of the radio amateur
- dw Ionosphere
- dgHwEHw Radio Engineering Radio Engineering
- dgQ Interference
- MEdCMEM Communications Radio Communications Electrical Communication
- GNgjNXp List of electronics terms
- dgp Radio fee
- dgVw Radio astronomy
- dg i61j Days of radio (6 April 1, 2007)
- dg`Qh~ Area radio propagation failure prevention
- dgq Disease electromagnetic hypersensitivity
- WI Radio
- Aei Antenna
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