Matsushita Electric Industrial Co., Ltd.

Jun Ito

Yoshio Koyanagi

Hisashi Morishita

A one-wavelength loop antenna element ( ) shaped like a rectangle is placed close to a radio base plate ( ) and further is bent at both end parts toward a feeding section, whereby a current distribution where the current at the tip of turn up becomes zero is formed. Current is concentrated on the loop antenna element ( ), so that the current component flowing onto the top of the radio base plate ( ) is decreased, the effect produced when a human being carries a radio containing an antenna including the loop antenna element is suppressed, and the directivity responsive to an arrival wave is formed.

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Yokosuka, Japan

Jun Ito