What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation?
A linearly polarized antenna
A circularly polarized antenna✓پاسخ درست
An isotropic antenna
A log-periodic dipole array
توضیح
Faraday rotation in the ionosphere twists the plane of a linearly polarized signal and a spinning satellite sweeps its antenna orientation, both of which produce deep fades against a linearly polarized ground antenna. A circularly polarized antenna responds equally to all orientations of the incoming polarization, trading a constant few decibels for the loss of those fades.