Increasing aviation safety

Pilots and air traffic controllers must have reliable radio equipment. Any failure or any interference can lead to serious consequences. Therefore radio monitoring authorities pay special attention to the frequency band to be protected. As a world-leading manufacturer of radio monitoring equipment, Rohde & Schwarz markets numerous devices and systems for monitoring radio traffic and identifying and locating interference sources.

Air traffic control direction finders

The latest generation of R&S®DDF04E digital direction finders for air traffic control enables users to take the bearings of multiple aircraft simultaneously using just one direction finder. This capability offers important savings in terms of space and money. The use of a wide-aperture DF antenna with nine antenna elements, in combination with the correlative interferometer DF method, provides high DF accuracy, sensitivity and outstanding immunity to reflections. The R&S®DDF04E features wideband functionality. Direction finding can therefore take place on as many as 32 channels (optional) simultaneously with the same high level of performance. The direction finder contains control software for the flexible management of the frequency channels.

Equipment and systems for troubleshooting

Radio equipment is the key component in an air traffic control system and has to operate reliably 24 hours a day, seven days a week. As a system planner and integrator, Rohde & Schwarz takes every step to exclude system malfunctions as far as possible and builds redundant components into its systems to render faults harmless if they do occur. Failures or malfunctions of third-party equipment, however, are impossible to preclude or prevent. When they happen, they need to be dealt with swiftly and effectively, and this calls for a precise understanding of the nature and origin of the fault.

The Rohde & Schwarz portfolio of radiomonitoring and direction finding equipment provides comprehensive and reliable tools for gathering the necessary information.

Downloads and links

Please choose from a selection of brochures and applications to share our knowledge of ATC solutions.

Please visit the radiomonitoring section at our main web page to see the entire product range and its related literature:

Digital direction finder

ddf04e
The R&S®DDF04E represents the new generation of traffic control direction finders. Radio direction finding for air and maritime traffic control is performed simultaneously on multiple frequency channels using only one direction finder.

Wideband monitoring receivers

eb500
Wideband monitoring receivers have been specifically designed for signal search, radiomonitoring and spectrum monitoring in line with ITU recommendations. They are equally suited for mobile and stationary use.

Portable receivers

pr100
Portable receivers have been specifically designed for radiomonitoring applications in the field. The receiver’s functions and control concepts have been optimized for monitoring tasks. In addition, they can be used for a variety of other applications.

Multichannel DF antennas


The wide product range covers stationary, transportable and mobile applications. In development, the focus was on the lightning protection concept of the antennas and their immunity to harsh ambient conditions.