With FM ranging, the time lag between transmission and reception is converted to a frequency shift. By measuring this shift, the range is determined. Typically, the transmitter frequency is changed at a constant rate. The change is continued over a considerable period of time so the frequency difference can be accurately measured.

Chapter Contents:

• Basic Principle
• Accounting for the Doppler Shift
• Eliminating Ghosts
• Performance

Inspec keywords: FM radar; radar transmitters

Other keywords: FM ranging; frequency shift; transmission; time lag; reception; transmitter frequency

Subjects: Radar equipment, systems and applications