Extending the operation of mode stirred chambers to low frequencies

In this paper a new technique is presented to excite the fields inside a mode stirred chamber down to very low frequencies. The proposed approach is then simulated using the method of moments (MoM). In a previous paper by the authors, it was shown that this type of simulation agrees very well with actual measurements. The proposed technique is based on the use of wires parallel to the coordinate axis of the chamber. Each wire and the walls parallel to them form a coaxial transmission line that can support a transverse electromagnetic (TEM) wave also called a transmission line mode. The TEM wave has no frequency limitation being capable of exciting fields from DC to any frequency.