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

26 MHz Local Coverage Systems

HF digital broadcasting in the 26 MHz broadcasting band using DRM® signals has been demonstrated in London, Mexico City, and Brasilia to provide FM-like radio reception. These demonstrations proved that FM-quality broadcast coverage of a metropolitan area can be achieved using inexpensive broadcasting equipment in a frequency band that is already an under-utilized broadcasting band.


TCI's Sky-Wave Suppressing HF Antenna

Elevation Pattern
Azimuth Pattern

  • 26 MHz direct wave provides line-of-site coverage similar to FM
  • Transmitter 0.1 to 2 kW
  • Radius 50 to 75 km
  • Antenna must suppress sky-wave coverage to avoid interfering with distant stations
  • DRM can "multicast" up to four programs in a single channel