Antenna with built-in filter
First Claim
1. An antenna with built-in filter comprising:
- a laminated dielectric block that is formed such that dielectric sheets each having a conductive film formed on one surface are laminated so as to constitute at least one filter;
a radiation element fixedly provided at the laminated dielectric block and electrically connected to one electrode of the filter; and
a feeding terminal electrode electrically connected to the other electrode of the filter and provided at the outer face of the laminated dielectric block, wherein the feeding terminal electrode is provided on a mounting face that is a face opposing to a circuit board when the laminated dielectric block is mounted on the circuit board and a connecting wiring for connecting the other electrode of the filter and the feeding terminal electrode is not exposed to the outer face other than the mounting face of the laminated dielectric block.
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Accused Products
Abstract
A laminated dielectric block (3) is formed by laminating dielectric sheets (31) each having a conductive film formed on its one surface so as to constitute at least one filter (2). A radiation element (1) is provided so as to fix to the laminating dielectric block, wherein one electrode of the filter is electrically connected to the radiation element. The other electrode (22) of the filter is connected to a feeding terminal electrode (4) provided mounting face B (a face opposing to a circuit board) of the laminated dielectric block through a via-contact (33) and a wiring (34), not being exposed to the side face. As a result, an antenna with built-in filter of the structure where even if it is mounted on a circuit board, interference between an electronic circuit on the circuit board and the feeding terminal electrode of the antenna is prevented to improve the isolation characteristic and transmitting or receiving characteristic.
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Citations
10 Claims
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1. An antenna with built-in filter comprising:
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a laminated dielectric block that is formed such that dielectric sheets each having a conductive film formed on one surface are laminated so as to constitute at least one filter;
a radiation element fixedly provided at the laminated dielectric block and electrically connected to one electrode of the filter; and
a feeding terminal electrode electrically connected to the other electrode of the filter and provided at the outer face of the laminated dielectric block, wherein the feeding terminal electrode is provided on a mounting face that is a face opposing to a circuit board when the laminated dielectric block is mounted on the circuit board and a connecting wiring for connecting the other electrode of the filter and the feeding terminal electrode is not exposed to the outer face other than the mounting face of the laminated dielectric block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification