Some of the antennas weren’t bad on the UHF band. That makes sense because the antenna is physically larger but at VHF the size didn’t seem a big difference. He even showed up a little real ...

但是在电离层和大气层（对流层）的特殊条件下，40MHZ以上的VHF和UHF信号可以沿地球表面传播到数百公里以外，我们通常把这种超“视距”的传播称为远距离传播。有时，VHF段的无线电信号也可以通过电离层的特殊条件反射，传播到几千公里以外，这种传播我们 ...

JapanNext has made a 24-inch "gaming monitor" that delightfully harkens back to when TVs had dials instead of remotes.

Table 7-1 relates frequency to wavelength and band designation. The behavior of the radio frequencies at the high end of the UHF band and across the microwave and millimeter bands differs from that of ...