SURFACE MOUNTING ANTENNA AND WIRELESS DEVICE USING IT

Title:

SURFACE MOUNTING ANTENNA AND WIRELESS DEVICE USING IT

Document Type and Number:

Japanese Patent JP2003046322

Kind Code:

A

Abstract:

To provide a surface mounting antenna used for a mobile telephone or the like that can freely set a place of a feeding electrode without deteriorat ing electric characteristics and enhance the surface mounting performance.

A first ground electrode 3 is provided on one major side 2a of a flat base 2 and a radiation electrode 6 is placed on the other major side 2b of the base 2 so that its one end forms an open end 6a. A short-circuit plate 7 connecting the other end of the radiation electrode 6 to the first ground electrode 3 is placed to an end face 2c of the base 2, and a feeding electrode 9 is placed to an end face 2d of the base 2. Further, an impedance matching circuit 10 interconnecting the radiation electrode 6 and the feeding electrode 9 is placed to the end face 2d of the base 2. Thus, even while the feeding electrode 9 is connected to an optional position of the radiation electrode 6 (including the short-circuit plate 7), the input impedance is matched and the electric characteristics of the surface mounting antenna 1 can be facilitated.

Inventors:

EGAWA MASAHIRO
MIDORIKAWA KUNIO
SATO MITSURU
OKABE HIROYUKI

Application Number:

JP2001227639A

Publication Date:

February 14, 2003

Filing Date:

July 27, 2001

Export Citation:

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Assignee:

IWAKI ELECTRONICS CORP

International Classes:

H01Q13/08; H01Q1/24; H01Q1/38; H01Q9/40; H04B1/38; (IPC1-7): H01Q13/08; H01Q1/24; H01Q1/38; H01Q9/40; H04B1/38

Attorney, Agent or Firm:

Yukio Ogata (1 person outside)

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