Polarization of Microwaves (K3) [6H10.20]
Electromagnetic Oscillations
A microwave transmitter emits a variable polarized signal between 0.4-4.0 KHz. A receiver, connected to an audio speaker to make the received signal audible, faces the transmitter. A metallic grid, consisting of thin and closely spaced parallel bars, is held between them at various orientations. When the bars are held parallel to the E-field, the signal is blocked. When the bars are rotated 90 degrees, however, the signal is uninterrupted. A solid metallic sheet attenuates the waves. The output can also be displayed on an oscilloscope.
https://www.youtube.com/watch?v=1IrOzO2PNVQ
Plug the microwave modulator in to turn it on. The microwave receiver must be turned on individually. Using a BNC tee, connect both the speaker and the oscilloscope through the differential amp to the microwave receiver. Be wary of overloading the differential amp. Once you have a clear signal on the oscilloscope, use the metal grids in between the transmitter and receiver. Hold them vertically and then horizontally between the microwave transmitter and receiver and note the effect on the oscilloscope as the microwaves are polarized. The grids can also be layered on top of each other. A solid aluminum sheet held between the transmitter and receiver may also demonstrate attenuation.
Tags: Subjects, themes, or courses that may be useful for sorting demos
Any supplemental materials, notes, warnings, etc.