Two new additions to the turnstile family of antennas are described: 1) a horizontally polarized "turnstile II" antenna and 2) a circularly polarized turnstile antenna. These antennas feature a rotating phase feed based on the original RCA Superturnstile design which, because of its simplicity, electrical characteristics, and versatility, is today the most popular TV broadcast antenna.
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O. Bendov (1976) studied this question.