Tool/software:
Hi,
I have been testing the detection capability of IWR6843ISK with both the 3-patch and 6-patch antenna versions. During my verification, I noticed something unusual:
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With the 6-patch antenna, under MIMO mode with all three Tx enabled, objects at certain angles cannot be detected.
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For example, with a reflector at −30°, the range FFT output clearly shows a peak at the expected distance, but when converting to x-y coordinates (AoA result), no corresponding stationary detection point appears.
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Under the same conditions, the 3-patch antenna can detect the object normally.
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Both tests were done with the same firmware image and environment.
My questions are:
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Are there any similar cases, or documents that explain such differences?
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With the 6-patch antenna structure, are there known angle blind spots or limitations when using MIMO?
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Are there recommended adjustments in antenna configuration or parameters to improve this behavior?
Any insights, experiences, or references would be greatly appreciated. Thanks in advance!
Best Regards,
CH
