Hz is short for Hertz, it means frequency, which means the periodicities of electric wave per second, and the times of redraw per second. f=1/ T, it is the reciprocal of period (T). For example, 60Hz、1MHz、4MHz、200MHz、900MHz、1000MHz,1M=1000K=10^6.
The transmission frequency is equal to transmission bandwidth, the same as the width of road. The frequency is higher, the width of road is wider. For example, frequency 200MHz has its width 200MHz.
