IT is now well known that electric waves having a wave-length of less than about 8 metres are of little use for long-distance radio communication, owing to X the apparent inability of the ...

Diffraction affects radio and television signals. Long wave radio signals are much less affected by buildings, hills, tunnels etc. than those of short wave or VHF radio, or television.

FM radio works the same way that AM radio works. The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to ...

With Ranging Mode (R-Mode), the German Aerospace Center DLR is working with partners to develop an alternative to ...