H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
H01Q 13/08 (2006.01) H01Q 1/22 (2006.01) H01Q 1/24 (2006.01) H01Q 1/38 (2006.01) H01Q 1/52 (2006.01) H01Q 9/04 (2006.01)
Patent
CA 2426497
Power non-supplied side radiation electrode 3 and power supplied side radiation electrode 4 are formed on the surface of a dielectric substrate 2 with a space therebetween. A permittivity adjusting material portion 8 is provided in the space S which is situated between the power non-supplied side radiation electrode 3 and the power supplied side radiation electrode 4, and in which a capacity occurs. The permittivity adjusting material portion 8 has a lower permittivity than that of the dielectric substrate 2, which causes the permittivity between the power non-supplied side radiation electrode 3 and the power supplied side radiation electrode 4 to be lower than that of dielectric substrate 2, and weaken the capacitive coupling between the power non-supplied side radiation electrode 3 and the power supplied side radiation electrode 4. As a result, it becomes possible to suppress the mutual interference of the resonances of the power non-supplied side radiation electrode 3 and the power supplied side radiation electrode 4, and to thereby improve antenna characteristics, without taking measures such as widening of the space S between the power non-supplied side radiation electrode 3 and the power supplied side radiation electrode 4, or a reduction of the permittivity of the dielectric substrate 2, the measures - 42 - hindering the surface-mounted type antenna 1 from miniaturization.
Une électrode de radiation parasite (13) et une électrode de radiation excitée (4) sont formées selon un certain intervalle sur la surface d'une base diélectrique (2). Un matériau (8) permettant l'ajustement de la permittivité est prévu à une certaine distance (S) entre l'électrode de radiation parasite (3) et l'électrode de radiation excitée (4) où la capacité est créée. Le matériau (8) pour l'ajustement de la permittivité présente une permittivité inférieure à celle de la base diélectrique (2), de manière que la permittivité entre l'électrode de radiation parasite (3) et l'électrode de radiation excitée (4) soit inférieure à celle de la base diélectrique (2), le couplage capacitif entre l'électrode de radiation parasite (3) et l'électrode de radiation excitée (4) étant ainsi réduit. Ainsi, l'interaction en résonance entre l'électrode de radiation parasite (3) et l'électrode de radiation excitée (4) diminue, ce qui permet l'amélioration de l'efficacité de l'antenne sans qu'aucune mesure ne soit prise, telle que l'augmentation de l'intervalle (S) entre l'électrode de radiation parasite (3) et l'électrode de radiation excitée (4) et la réduction de la permittivité de la base diélectrique (2), mesures pouvant empêcher la miniaturisation d'une antenne montée en surface (1).
Ishihara Takashi
Kawahata Kazunari
Nagumo Shoji
Tsubaki Nobuhito
Murata Manufacturing Co. Ltd.
Sim & Mcburney
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