Doppler Frequency Calculator: Moving Reflector & Transmitter

This page offers a Doppler Frequency calculator based on the Doppler frequency equation. It specifically addresses the scenarios of a moving reflector and a moving transmitter. The calculator utilizes distinct equations for each of these cases.

Doppler Frequency Calculator - 1: Moving Reflector Case

Let’s dive into calculating the Doppler frequency when the reflector is in motion.

EXAMPLE #1 (Doppler frequency calculation for moving reflector case):

• Inputs : Speed of Wave source (m/sec) = 1000, Operating Frequency (MHz) = 3000 (i.e. 3GHz)
• Output : Doppler Frequency (Hz) = 20000 (i.e. 20KHz)

The following Doppler frequency formula is used to calculate the Doppler frequency when the reflector or target is moving. The Doppler frequency calculator#1 uses the following equation:

Doppler Frequency Calculator - 2: Moving Transmitter Case

Now, let’s explore the calculation when the transmitter is moving.

EXAMPLE #2 (Doppler frequency calculation for moving transmitter case):

• Inputs : Speed of Wave source (m/sec) = 1000, Operating Frequency (MHz) = 3000 (i.e. 3GHz)
• Output : Doppler Frequency (Hz) = 10000 (i.e. 10KHz)

The following Doppler frequency formula is employed to calculate the Doppler frequency when the transmitter is moving. The Doppler frequency calculator #2 uses the following equation: