VOR (Very High Frequency Omnidirectional Radio Range) is a radio navigation aid which has been recommended by ICAO and submitted to international access to guide short/medium-haul aircrafts. İt is controllable and traceable remotely. DVOR is developed version of CVOR radio navigation aid systems. A broad-based antenna system uses the Doppler effect,thus highly accurate horizontal signal may be provided.

 

 

DVOR's are devices which is desingned to be used in forestry areas, mountainous regions where have densly builded areas and the regions where high-voltage lines exist. These devices are identical to those of Conventional VOR devices but variable signal is not be delivered from a single cross-dipole array. DVOR system uses antenna system which is consisting of 36 or48 antenna array sorted circularly around the omnidirectional antenna which located in