Upon closure of a switch, the TEM wave
(step) travels at the speed of light between the conducting wires of the transmission line, from battery to load, as depicted in Fig.
Ando, "Single-layer feed waveguide consisting of posts for plane TEM wave
excitation in parallel plates," IEEE Trans.
In papers [9,10] a problem of transient TEM wave
excitation and diffraction in the biconical antenna has been solved in the time domain using an approach based on mode matching incorporated into the finite difference time stepping scheme for the mode channels.
This situation is similar to the TEM wave
incident normally to the planar boundary .
It can support true TEM wave
propagation and is capable of extremely wideband frequency performance.
Since a coaxial waveguide is used, a TEM wave
is propagating inside the waveguide.
In the numerical model, the Cartesian axis system is centered in the apex of the pyramidal shape of the GTEM cell and the z axis corresponds to the propagation direction of the TEM wave
We can get a decent estimate of this impedance by using the radial TEM wave
concepts described previously.
A TEM wave
enters the primary line AB at input port A and leaves at the output port B.
The electric field component can be derived from a linear superposition of the TEM wave
and an oscillating magnetic dipole at the end of the conductor.
The energy is transported in the cell mainly by TEM waves
, which are the dominant mode up to the frequencies where transversal electric (TE) modes are also excited .
The corresponding wave numbers for the TEM waves