Various guides on capacitive electrode design exist. Azoteq’s application note AZD073 is a guide that focuses on passing the SAR test specifications and focuses on proximity based electrode design.

Test & Measurement. Proximity Sensor Travels a New Path. Aug. 9, 2022. STMicroelectronics' engineer Tom Bocchino explains how the company's TMOS sensor can detect human presence and proximity.

This tiny proximity sensor looks like a nifty chip, providing distance measurements up to 200 mm and an ambient light sensor in one package. The routing table has an LCD display and buttons, ...

Imagine draining the charge of the C-under-test pin while charging up the 1pF internal cap and then toggling the 1pF between the CUT and 3V3 a couple times to simulate larger capacitance, slowly ...