Transverse-electromagnetic-mode (TEM) is an electromagnetic field pattern of radiation where both E and H fields are perpendicular to the direction of the radiation propagation.
A TEM Cell is an expanded coaxial transmission line (septum) that propagates TEM waves (within a cavity):
– E and H field are approximately uniform between the septum and cavity ceiling
– Approximately simulates a planar field in free space (377Ω far-field wave impedance)
– E field strength at the mid-point between the septum and cavity ceiling is related to the RF voltage between septum and cavity GND, and the septum to cavity ceiling height
The SAE J1752-3 standard defines a method for measuring EM radiation of an integrated circuit (IC) using a TEM Cell.
ESDEMC TEM Cell Products are specially designed to satisfy the requirements of the following standards:
▪ SAE J1752-3
▪ IEC 61967-8
▪ IEC 61967-2
Software solution is available for J1752-3 compliant RE testing and emissions level classification