Spectrum Monitoring & Management Systems
Broadcast & Communication Antennas
Communication Intelligence
Direction Finding Systems

Long Range Short Wave Using DRM

Long range short wave broadcasts using conventional analog modulation have often suffered from poor signal quality because of fading, static, and interference. Implementing DRM modulation on long range, high power short wave broadcasts improves signal quality tremendously, producing a relatively static-free signal with the fidelity and lack of fading familiar to FM listeners.
All of TCI's high power short wave Dipole Arrays and Log-Periodics are digital ready and are fully capable of handling DRM modulation without any modifications. These antennas, when operated with DRM-capable high power transmitters, can provide high quality signals over enormous distances and wide geographical areas. DRM Short Wave Broadcasting is a highly effective means of reaching large audiences at very low cost.


    Dipole Array Antennas (120 m tall)
     
      
    High-Gain Log Periodic Antenna (70 m tall)
  • Range is 1000's of kilometers
  • 50 to 500 kW transmitters
  • 4 to 26 MHz
  • Requires
    • Directional azimuth patterns
    • Low take-off angles
  • Typical Antennas
    • Dipole Array
    • High-Gain Log-Periodic
    • Can be situated on inexpensive land in a distant country
As an example, one 500 kW DRM transmitter with a TCI Model 611VS Dipole Curtain Antenna could cover most of the west coast of Mexico and the United States.
 
  • Mexico Transmit Site
  • 500 kW Transmitter
  • Dipole Array (4/4/.5)
  • Cover all of West Coast (3800 km range)
  • 55 to 65 dBu
  • 560-1780 uV/m