3kSVC

45° Triangle Ruler - NFC - with AEDL logo

Overview

The core work involved coupling the NFC function to the triangular plate, specifically designing and simulating the irregularly shaped coil. After soldering, the NFC function tested and was found to be normal. The deviation between the simulated and actual inductance values was acceptable. The
simulated inductance value was 2.75uH, and with a 50pF coupling capacitor, the resonant frequency was exactly the chip's operating frequency.
The measured inductance value was 3.56uH. My instrument has some issues and isn't very accurate, and the maximum frequency is only 1MHz… At least the inductance value wasn't that far off. The
NFC function test passed. It was also discovered that the coupling capacitor doesn't need to be used.

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Update:2026-03-24 00:53:59

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