Title:
ANTENNA DEVICE AND RADIO COMMUNICATION APPARATUS USING THE SAME
Document Type and Number:
Japanese Patent JP2004304226
Kind Code:
A
Abstract:
To achieve an antenna to be used for communication mainly in a microwave band, which is small and capable of changing directivity characteristics.
A resonant operation control means 107 for changing a resonant operation by changing a load impedance is connected to an antenna element 101 having a patch antenna 102 with an electric length of one wavelength, and a slot antenna 103 with an electric length of a half wavelength. With this configuration, the relative strength and relative phase between a primary resonant operation and a secondary resonant operation having different directional characteristics of the antenna element are changed. This configuration is used for the small antenna element 101 to change the directivity characteristics.
Inventors:
ADACHI NAOKI
SATO JUNJI
SATO JUNJI
Application Number:
JP2003091204A
Publication Date:
October 28, 2004
Filing Date:
March 28, 2003
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H01Q3/26; H01Q13/08; H01Q13/10; (IPC1-7): H01Q3/26; H01Q13/08; H01Q13/10
Attorney, Agent or Firm:
Fumio Iwahashi
Tomoyasu Sakaguchi
Hiroki Naito
Tomoyasu Sakaguchi
Hiroki Naito
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