System Design · 9 min read
Extending coverage with multiple coils — coupling, isolation, and time-division strategies.
One coil covers one sweet spot. When you need a larger or oddly shaped interrogation zone — a long checkout surface, a shelf, a charging mat with NFC pairing — you reach for multiple coils. But coils near each other couple, detune, and create dead zones at the seams. This guide is about making an array behave.
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