Phase array antenna device and antenna unit thereof

Abstract

A phase array antenna device and a plurality of antennas thereof are disclosed. Each of the antennas includes an antenna radiation element and a polarization selection circuit. The polarization selection circuit is configured to convert an input signal to a first output signal and / or a second output signal. The first output signal and / or the second output signal is fed to the antenna radiation element so as to generate linearly polarized electromagnetic waves or circularly polarized electromagnetic waves which are radiated out by the antenna radiation element. The phase difference between the first output signal and the second output signal is

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