Surface mount antenna, antenna device using the same, and communication device
First Claim
1. A surface mount antenna comprising a dielectric substrate and a radiation electrode operative to perform an antenna-operation and arranged in a loop-shape so as to be extended over a plurality of surfaces of the dielectric substrate;
- the radiation electrode including an electric feeding portion disposed on one side thereof and connected to an external circuit, the radiation electrode being branched in a branching portion existing along a path from the electric feeding portion to the other end to define a plurality of branched radiation electrodes;
one of the branched radiation electrodes being an in-loop branched radiation electrode which is surrounded by a loop-shaped electrode including the radiation electrode portion extended from the electric feeding portion to the branching portion and another branched radiation electrode connected to the radiation electrode portion, the in-loop branched radiation electrode being spaced at an interval from the loop-shaped electrode portion;
the in-loop branched radiation electrode and the radiation electrode portion extended from the electric feeding portion to the branching portion defining a capacitance therebetween; and
at least front ends of the respective branched radiation electrodes being arranged on different surfaces of the dielectric substrate.
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Accused Products
Abstract
A surface mount antenna includes a loop-shaped radiation electrode arranged so as to be extended over a plurality of surfaces of a dielectric substrate. The front end side of the loop-shaped radiation electrode is branched to provide a plurality of branched radiation electrodes. One side end of the radiation electrode functions as a electric feeding portion connected to an external circuit. One of the branched radiation electrodes is an in-loop branched radiation electrode which is surrounded by a loop-shaped electrode portion including the radiation electrode portion extended from the feeding portion of the radiation electrode to a branching portion and the other branched radiation electrode connected to the radiation electrode portion, the in-loop branched radiation electrode being positioned at an interval from the loop-shaped electrode. A capacitance is generated between the one of the branched radiation electrodes and the radiation electrode portion extended from the feeding portion of the radiation electrode to the branching portion.
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Citations
19 Claims
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1. A surface mount antenna comprising a dielectric substrate and a radiation electrode operative to perform an antenna-operation and arranged in a loop-shape so as to be extended over a plurality of surfaces of the dielectric substrate;
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the radiation electrode including an electric feeding portion disposed on one side thereof and connected to an external circuit, the radiation electrode being branched in a branching portion existing along a path from the electric feeding portion to the other end to define a plurality of branched radiation electrodes;
one of the branched radiation electrodes being an in-loop branched radiation electrode which is surrounded by a loop-shaped electrode including the radiation electrode portion extended from the electric feeding portion to the branching portion and another branched radiation electrode connected to the radiation electrode portion, the in-loop branched radiation electrode being spaced at an interval from the loop-shaped electrode portion;
the in-loop branched radiation electrode and the radiation electrode portion extended from the electric feeding portion to the branching portion defining a capacitance therebetween; and
at least front ends of the respective branched radiation electrodes being arranged on different surfaces of the dielectric substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification