A circularly polarized FET oscillator active radiating element

An FET oscillator that combines the power from three devices and directly generates circularly polarized radiation using a novel feedback arrangement is presented. Because of its transmission type configuration, it exhibits a broad injection locking range. This makes it useful as an element of an active antenna, where several such oscillators would be locked to a modulated signal. The injection locking signal would be orders of magnitude lower than the corresponding drive level for a passive antenna. The radiated field exhibits a minimum axial ratio of 1.04.<
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