Automotive
PCR is often preferred in battery-powered systems and is well-suited for low-power short-range applications.
Adjustable field vs retro-reflective sensors
Adjustable field radar detects objects by sensing reflected RF waves. They are well- suited to detect objects with a large radar cross-section that reflects a lot of RF energy. Objects with large metallic surface areas, especially surfaces that are perpendicular to the radar beam, typically have large radar cross-sections.
Adjustable field radar sensors can have configurable set-point distances. The sensor uses ToF calculations to determine the target range and only signals the presence of targets within the set-point distance. A retro-reflective radar sensor relies on the presence of a reflective reference target like a wall. It detects objects by identifying disruptions in the return signal from the reference target. These radar sensors can be optimized to sense objects even if they don’t have large radar cross-sections.
60 GHz, FMCW radar sensors The Q90R series of FMCW adjustable field radar sensors operate at 60 GHz and provide balanced performance in terms of accuracy, range, and material detection capabilities. In addition, they are IP69K-rated and suited for use in demanding environments (Figure 2). They are available with 120° by 40° or 40° by 40° fields of view. Parameters like range and detecting the nearest or the strongest object can be modified for specific application requirements.
The Q90R2-12040-6KDQ features a highly-configurable 120° by 40° field of view that can be split into independent detection zones and enables
Figure 2: The Q90R series of FMCW adjustable field radar sensors operate at 60 GHz and are in a rugged IP69K package. (Image source: DigiKey)
Figure 3: Q90R2 radar sensors have a configurable and wide 120° by 40° field of view (Image source: Banner Engineering)
precision position sensing (Figure 3). Its multidimensional sensing ability can support more intelligent object detection based on distance, radial position, and speed thresholds. Like other models in the Q90R family of radar sensors, it has a range of 0.15 to 20 m. It also offers flexible connectivity options, including IO-Link and Banner’s Pulse Pro pulse frequency modulation (PFM) technology.
Software unlocks the performance The powerful features of the Q90R and Q90R2 radar sensors can be unlocked using Banner’s Measurement Sensor Software, a graphical user interface (GUI) that enables designers to configure and visualize data from the sensors.
The software provides a graphic that shows what the sensor is seeing, which is useful for sensors without visible beams, like radar sensors. Users can modify sensor parameters, such as response speed, output configurations, and filtering options. The 120° by 40° field of view of the Q90R2 is highly configurable and enables precision positioning and control. Designers Continues on page 18
Figure 4: Banner’s Measurement Sensor Software enables designers to optimize the field of view (top) and the window shapes and target points (bottom). (Image source: Banner Engineering)
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Components in Electronics
February 2025 17
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