微波適合用作衛星通訊的兩項特性

1. Microwaves used in satellite telecommunication are of range between 3 GHz to 300 GHz. Such freuqncies can penetrate through the ionosphere (which is a layer of ionized air at the upper atmosphere at an altitude of about 250-300 km ) without being reflected back to earth.

2. High frequency microwave, because of its very short wavelength, can be confined to a narrow beam, thus easily targeted at the communication satellite without unnecessary energy loss. Also, the short wavelength could minimize any diffraction effect of the wave.