80 ghz FMCW Radar Level Transmitter Technology
The technology of the FMCW Frequency Modulated Continuous Wave radar level Transmitter is based on the
emotion of electromagnetic waves on the top of the tank, and receiving the reflected wave from surface of
product in the tank. By this technology it is possible that to make measurements in a long range with a very
low resolution. High frequency of operation allowed to use small antenna. It is a best choice for demanding
level application.
80 GHZ RADAR LEVEL TRANSMITTER BRLT001
Advantages of 80 GHz Radar Technology
Many of current radar transmitters in the level area are based on 26 GHZ and lower frequency
technologies. The 80 GHz radar technology offers significant advantages over lower frequency systems
(5-12 GHz and 26 GHz), making it the preferred choice for industrial measurement applications. Key
benefits are:
Compact Antenna Size: The higher frequency allows for smaller antennas, which are easier to install in
confined spaces.
Enhanced Focus ability: By using polymer based lens, it is possible to provide improved focusability,
which enables accurate and stable measurements even in harsh industrial environments.
Narrow Beam Angle: A narrower beam angle reduces the likelihood of interference from nearby
structures or obstacles.
These features make the 80 GHz radar ideal for measuring liquids, powders, emulsions, and various
chemicals. Its applications span several industries, including:
Water and wastewater Industry: Reliable monitoring of water levels in treatment plants and reservoirs.
Monitoring levels in tanks, basins, and treatment facilities.
Food Industry: Accurate level measurement while meeting hygiene standards. Ensuring compliance with
hygiene standards and CIP cycles while providing accurate level measurements.
Power Industry: Efficient level monitoring in all types of power plants.
Pharmaceutical Industry: Precision in controlled environments for critical processes. Precise
measurement in cleanroom environments and production processes.
Chemical Industry: Versatile and accurate measurement capabilities for diverse chemical applications.
Measuring corrosive and non-corrosive liquids, slurries, and powders.
With millimetre-level accuracy, the 80 GHz radar technology provides stable measurement results,
enhancing process efficiency and ensuring reliable operation.
Radar level Transmitter
80 GHZ RADAR LEVEL TRANSMITTER BRLT001
Measurement principle
1. Continuous Wave Signal:
○ FMCW systems continuously emit a signal that is modulated in frequency
over time. Unlike pulsed radar systems, which emit short bursts of signals,
FMCW systems generate a constant waveform.
2. Frequency Modulation:
○ The emitted signal frequency is varied (modulated) in a linear fashion over
a specified period. This modulation typically follows a triangular or
sawtooth waveform, where the frequency increases and then decreases.
3. Echo Reception:
○ When the emitted signal impacts a liquid or powder surface, part of the
signal is reflected back to the transmitter. The time it takes for the signal to
travel to the target and back is used to determine distance. In the FMCW
technology, beat frequency of reflected wave is used for this purpose.
4. Beat Frequency:
○ The received echo signal will have a frequency that differs from the
transmitted frequency because of the time delay in the round trip. The
difference in frequency between the transmitted (brown curve) and received
signal (green curve) is called the beat frequency.
○ The beat frequency is directly related to the distance to the target: fb=2d/c
○ where:
■ fb = Beat frequency
■ d = Distance to the target
■ c = Speed of electromagnetic wave in the mediu
80 GHZ RADAR LEVEL TRANSMITTER BRLT001
5. Distance Calculation:
○ The system measures the beat frequency and uses it to calculate the
distance to the target. Since the modulation is linear, the relationship
between the frequency shift and distance is linear, allowing for accurate
measurement. Due to frequency modulation, FMCW devices are robust
against losses during roundtrip of electromagnetic waves. Therefore
environmental effects can not degrade the performance of level
measurement.
Key Features
● High Frequency: Typically operates in the 80 GHz range, allowing for smaller antennas and
narrow beam angles.
● Millimeter Accuracy: Offers high precision, with measurements typically within a few
millimeters.
● Non-Contact Measurement: Measures levels without physical contact with the medium,
reducing maintenance needs and extending equipment life.
● Robust Signal Processing: Advanced algorithms minimise false echoes and provide reliable data
even in challenging conditions.
● Wide Measurement Range: Suitable for a variety of applications, from small containers to large
tanks, up to 100 metres