Compensation for signal fading in communication system - uses single antenna and compares signals received at different angles of incidence

摘要

The method for the compensation of propagation fading in a communications system using angular diversity reception with a single aerial system. Signals arriving axially to the antenna exciter (Er) are arranged to excite a signal of basic wave type (H10) and those arriving at an angle to the axis excite a signal of a higher mode (H20), the two being separated in the mode coupler (M). The two separated signals are fed to a pair of receivers coupled to give diversity reception in the normal way.