Power, Grounding and Enclosure Rules for a 60 GHz Radar Module

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Failed radar product tests are usually traced to the power supply, ground routing, or an enclosure placed too close to the antenna rather than the sensor itself. The 3.3 V figure on the pinout refers only to I/O logic levels, so modules must be powered from 4.5–5.5 V, with ripple held to 100 mV or less using an LDO after the switcher. Power budgets should account for current peaks, since the fall module can draw 300 mA and the sleep module needs 200 mA available. Load switching should sit in a separate power domain, joined to the module ground at a single point, and GPIO pins should drive transistor gates rather than relays or lamps directly. The housing over the antenna should be flat, non-metallic, and positioned 3–5 mm from the antenna face, with nothing metallic nearby.

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