Kabushiki Kaisha Toshiba

Toshiyuki Haga

Hisao Iwasaki

Yasushi Iitsuka

Tasuku Morooka

Power is supplied to antenna elements of a helical antenna section, which are arranged at an angular distance of 90&deg; therebetween, with a phase difference of 90&deg;. When a reception wavelength is &lgr;, the height of the helical antenna section is 0.6 &lgr; to 0.75 &lgr;, the number of turns, T, of each antenna element is about 1, and the pitch angle &agr; of each antenna element is 50&deg; to 60&deg;. A straight portion with a length corresponding to &frac14; of the height of the antenna section is formed at a location corresponding to &frac12; to &frac34; of the height of the antenna section, the height of the antenna section is about 0.3 &lgr; to 0.35 &lgr;, the number of turns, T, is about 1, and the pitch angle &agr; is about 22&deg;.

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Saitama, Japan

Toshiyuki Haga