Communications: radio wave antennas – Antennas – With housing or protective covering
Patent
1998-03-04
2000-05-16
Wong, Don
Communications: radio wave antennas
Antennas
With housing or protective covering
343895, 343700MS, H01Q 124, H01Q 136
Patent
active
06064351&
ABSTRACT:
A chip antenna 10 is formed of a rectangular prism substrate 11 made of a dielectric material (relative magnetic permeability: approximately 6.1) essentially consisting of barium oxide, aluminum oxide, and silica. A conductor 12 is spirally wound within the substrate 11 in the longitudinal direction of the substrate 11. A power feeding terminal 13 is formed on a surface of the substrate 11 and is connected to one end of the conductor 12 in order to apply a voltage to the conductor 12. A trimming electrode 14 generally formed in the shape of a rectangle is formed on a surface of the substrate 11 and is connected to the other end of the conductor 12. With the above configuration, a capacitive coupling is generated between the trimming electrode 14 and a ground (not shown) of a mobile communication unit on which the chip antenna 10 is mounted, and between the trimming electrode 14 and the conductor 12.
REFERENCES:
patent: 4720620 (1988-01-01), Arima
patent: 5268702 (1993-12-01), Amano et al.
patent: 5541610 (1996-07-01), Imanishi et al.
patent: 5561437 (1996-10-01), Phillips et al.
patent: 5754146 (1998-05-01), Knowles et al.
Mandai Harufumi
Tsuru Teruhisa
Clinger James
Murata Manufacturing Co. Ltd.
Wong Don
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