A circuit assembly is provided and includes a printed circuit board (PCB) having a circuit element region and defining a trench surrounding an entirety of the circuit element region, a circuit element disposed within the circuit element region of the PCB; and a Faraday wall. The Faraday wall includes a solid, unitary body having a same shape as the trench. The Faraday wall is disposed within the trench to surround an entirety of the circuit element.