What is Beam Angle of a Radar Level Transmitter?
The beam angle of a radar level transmitter refers to the width of the radar signal emitted by the transmitter antenna. It determines the coverage area or the area over which the radar transmitter can effectively measure the level of the material.
A narrower beam angle means that the radar signal is more focused, resulting in higher precision but potentially limiting coverage area. Conversely, a wider beam angle provides broader coverage but may sacrifice some precision.
In practical terms, the beam angle is a crucial parameter to consider when selecting a radar level transmitter for a specific application. It should be chosen based on factors such as the size and shape of the vessel or tank, the characteristics of the material being measured, and the required level of accuracy. I see what you mean. Let’s visualize it for better clarity:
Consider two radar level transmitters:
- Transmitter A: Operates at 26 GHz radar frequency with an antenna aperture of 80 mm.
- Beam angle: Approximately 12°
- Transmitter B: Operates at 79 GHz radar frequency with the same antenna aperture of 80 mm.
- Beam angle: Approximately 4°
Now, imagine these radar beams emanating from each transmitter:
- For Transmitter A (26 GHz), the beam angle is wider, covering a broader area but with potentially less precision.
- For Transmitter B (79 GHz), the beam angle is narrower, resulting in a more focused signal with higher precision but limited coverage area.