Second exampleWave incident at angle to flat reflector, no gap

Panel Gap Models for the SPT

In this example, the plane wave enters from the upper left at a 5.7 angle to the vertical, and strikes the flat, perfectly reflecting surface.  What is shown is magnitude of the E field at a plane in the middle of the volume.  The incident wave interferes with the reflected wave, resulting in a standing wave.  The E field of the standing wave must still always have a z dependence which varies as sin(2πz/λ) but in this case different parts of the wave in the x direction are excited at different times. At the reflecting surface, the magnitude of the E field is zero.  The box is 4 mm high in the z direction and 6mm wide in the x direction.  The frequency of the incoming wave is 150 GHz, so the box is approximately two wavelengths high.  The rms field strength of the incoming wave is 1 V/m.