Title:
ANTENNA DEVICE
Document Type and Number:
Japanese Patent JP3034415
Kind Code:
B
Abstract:
PURPOSE: To provide an antenna device by which an antenna element and a radio circuit part can be matched at the time of pulling out and storing the antenna with very simple structure without providing a special matching circuit.
CONSTITUTION: In this antenna device, the antenna element 6 which is held in a radio machine can be pulled out and stored is connected to the radio circuit part 2 through a connecting terminal 3. A base terminal 6a which is brought into contact with a fixed connection terminal 3 at the time of pulling out the antenna and a tip terminal 6b which is brought into contact with the fixed connection terminal 3 at the time of storing the antenna are formed in the antenna element 6. Furthermore, a dielectric layer 7 for impedance adjustment is provided on the surface of the tip terminal 6b, and the antenna element 6 is brought into contact with the fixed connection terminal 3 through the dielectric layer 7 at the time of storing the antenna. Thus, impedance can be adjusted only by previously selecting and forming the dielectric layer 7 having an optimum dielectric constant and thickness or the like on the surface of the base terminal 6a. At the time of storing the antenna, the antenna element can be matched with the radio circuit part 2 as well.
Inventors:
Komori, Eriko
Application Number:
JP1993000286656
Publication Date:
February 18, 2000
Filing Date:
November 16, 1993
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
B22C3/00; B22D15/00; B22D17/06; B22C3/00; B22D15/00; B22D17/02; (IPC1-7): H01Q1/24; H04B1/38
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