Telecommunication Division

Frequencies Supported

Radio waves are classified according to their frequency band. Each of these frequency bands has its own characteristics and their applications differ according to frequency. DKK supplies products supporting all frequency bands.

Figure: Frequencies supported

About Frequency

Radio waves travel at the speed of light (300,000 km/s). Frequency is the number of radio waves that can travel during a single second, and is expressed in terms of Hertz (Hz). Since the speed of radio waves is constant, low frequencies have long wavelengths while high frequencies have short wavelengths.

Figure: About Frequency

Very Low Frequency (VLF)

DKK provides design, manufacturing, construction, and maintenance services for antennas having overall lengths of several hundred meters.

Photo: Very Low Frequency (VLF)

Low Frequency (LF)

Low frequencies are used mainly for public service applications such as standard time and frequency equipment and radio beacons.

Photo: Low Frequency (LF)

Medium Frequency (MF)

These are used for medium wave broadcasting (AM radio), ship communications, LORAN (radio navigation), and other such applications.

Photo: Medium Frequency (MF)

High Frequency (HF)

High frequencies are widely used for shortwave radio broadcasts, midocean ship communications, international aircraft communications, international broadcasting, and ham radio.

Photo: High Frequency (HF)

Very High Frequency (VHF)

Television broadcasting, FM radio, ship and aircraft communications, disaster prevention and administrative radio systems, police and fire radio systems, ham radio, and so on use the VHF band.

Photo: Very High Frequency (VHF)

Ultra High Frequency (UHF)

The UHF band is widely used in cellular phones and terrestrial digital broadcasting, police radios, taxi radios, aircraft and weather radar, ham radio, and so on.

Photo: Ultra High Frequency (UHF)

Super High Frequency (SHF)

Super High Frequency are a frequency band that is essential for microwave telecommunications used in small and large diameter parabolic antennas and FPU rotator equipment, as well as reflector panels and other applications.

Photo: Super High Frequency (SHF)

Extremely High Frequency (EHF)

Extremely High Freauency are used in radar, as well as simple type terrestrial networks, satellite communications, etc.

Photo: Extremely High Frequency (EHF)

Related Information

Business Offices

Information about DKK's business offices.


Products handled by DKK.

  • Business and Products
  • Telecommunication Division
  • Products
  • Technology
  • Network in Japan and Overseas
  • Frequencies Supported
  • Very Low Frequency
  • Low Frequency
  • Medium Frequency
  • High Frequency
  • Very High Frequency
  • Ultra High Frequency
  • Super High Frequency
  • Extremely High Frequency
  • Usage Scenarios
  • Radio Frequency Division