Located between the microwave and infrared section of the electromagnetic spectrum, millimeter waves are electromagnetic radiation with wavelengths in the range 10mm to 1mm (with corresponding frequencies of 30 to 300GHz). Because of their high frequency and propagation characteristics, millimeter waves have shown to be suitable for numerous applications including: wireless communications, all weather remote sensing, atmospheric radiometry, monitoring of forest fires and active volcanoes, advanced plasma diagnostics, and many more.