Title:
SURFACE MOUNTED ANTENNA
Document Type and Number:
Japanese Patent JP3180550
Kind Code:
B2
Abstract:
PURPOSE: To obtain the wide range of frequency band width and to make it possible to obtain a required input return loss value even at the time of miniatur izing the whole constitution by forming a notched part on a substrate or forming a step part on a radiation electrode.
CONSTITUTION: A through hole 3 is formed so as to have apertures 3a, 3b on a pair of opposite side faces 2a, 2b of a dielectric substrate 2 for a surface mounted type antenna 1. The diameter of one aperture part 3b is larger than that of the other aperture part 3a through a step part 3c formed on the intermediate part of the hole 3 in the longitudinal direction as a boundary. A radiation electrode 4 is formed by applying a conductor to the inner periphery of the hole 3. The electrode 4 has end parts 4a, 4b and a step part 4c so as to respectively correspond to the aperature parts 3a, 3b and the step part 3c of the hole 3. Then a feeding electrode 5 is formed continuously to the electrode 4 by applying a conductor to the periphery of the aperture part 3a of the hole 3 on the side face 2a of the substrate 2. Ground electrodes 6 are formed by applying a conductor to both the end parts of the side face 2a and a side face electrode 7 is formed by applying a conductor to the side face 2b.
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Inventors:
Kazuya Kawabata
Yuichi Kushihi
Yuichi Kushihi
Application Number:
JP3867894A
Publication Date:
June 25, 2001
Filing Date:
March 09, 1994
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01Q13/08; H01Q1/38; H01Q1/40; H05K1/18; (IPC1-7): H01Q1/38
Domestic Patent References:
| JP7221537A | ||||
| JP4349703A | ||||
| JP2253702A | ||||
| JP522013A |