ANTENNA STRUCTURE AND COMMUNICATION DEVICE PROVIDED WITH THE SAME

Title:

ANTENNA STRUCTURE AND COMMUNICATION DEVICE PROVIDED WITH THE SAME

Document Type and Number:

Japanese Patent JP3912182

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide an antenna structure which is improved in antenna gain, maintaining directivity caused by a ground electrode.
SOLUTION: A feed radiating electrode 5 and non-feed radiating electrode 6 include an antenna portion 2 formed on a dielectric base body 4, and this antenna is to be installed on a board 3. A ground electrode 8 is formed on a surface of the board 3. An ungrounded portion 10 is formed for which the ground electrode 8 is not formed in an installed area Z of the antenna portion 2 in this ground electrode 8. The ground electrode at the bottom of dielectric substrate 4 of the antenna portion 2 is provided. A ungrounded portion, including larger area than the ungrounded portion 10, is formed to a position against the ungrounded portion 10 of the board 3 on this ground electrode. As a result of this, an antenna gain can be improved to a case with the ungrounded portion not being formed and a case that there is not the ungrounded portion, maintaining equivalent directivity.

Inventors:

Jin Sato
Kengo Onaka
Nao Ishihara

Application Number:

JP2002150137A

Publication Date:

May 09, 2007

Filing Date:

May 24, 2002

Export Citation:

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