微波是指波长在1mm~1000mm、频率在300MHz~300GHz范围之间的电磁波,因为它的波长与长波、中波与短波相比来说,要“微小”得多,所以它也就得名为“微波“了。微波有着不同于其他波段的重要特点,它自被人类发现以来,就不断地得到发展和应用。19世纪末,人们已经知道了超高频的许多 Microwave refers to the electromagnetic wave whose wavelength is between 1mm and 1000mm and whose frequency is in the range of 300MHz to 300GHz because its wavelength is much smaller than the long wave, medium wave and short wave, so it also has to be called “Microwave” now. Microwaves have important features that are different from those of other bands. Since their discovery by humans, microwaves have been continuously developed and applied. The late 19th century, people already know many of the UHF