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 that is provided on a mounting face of the dielectric block, and opposes to a circuit board when the laminated dielectric block is mounted on the circuit board;
wherein the feeding terminal electrode and the other electrode of the filter are electrically connected by at least one connecting wiring provided on one of one or more dielectric sheets, and two or more via-contacts each of which is composed of a conductor embedded into a contact hole formed in at least one of the one or more dielectric sheets,wherein the at least one connecting wiring and the two or more via-contacts are not exposed to an outer face of the laminated dielectric block, andwherein the two via-contacts are formed at places that are different from each other on a plane view of the dielectric block.
3 Assignments
0 Petitions
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.
36 Citations
11 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 that is provided on a mounting face of the dielectric block, and opposes to a circuit board when the laminated dielectric block is mounted on the circuit board; wherein the feeding terminal electrode and the other electrode of the filter are electrically connected by at least one connecting wiring provided on one of one or more dielectric sheets, and two or more via-contacts each of which is composed of a conductor embedded into a contact hole formed in at least one of the one or more dielectric sheets, wherein the at least one connecting wiring and the two or more via-contacts are not exposed to an outer face of the laminated dielectric block, and wherein the two via-contacts are formed at places that are different from each other on a plane view of the dielectric block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An antenna comprising:
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a dielectric filter block having first and second filter electrodes therein; a radiation element provided on the dielectric filter block and electrically connected to the first filter electrode of the dielectric filter block; a feeding terminal electrode provided on a mounting face of the dielectric filter block that faces a circuit board when the dielectric filter block is mounted on the circuit board; at least one connecting wiring that is provided in the dielectric filter block and extends in a first direction approximately parallel to the mounting face of the dielectric filter block; two or more via-contacts, each of which is composed of a conductor embedded into a contact hole formed in the dielectric filter block and extends in a second direction which is different from the first direction, and in which the two or more via-contacts are electrically connected through the at least one connecting wiring; wherein the feeding terminal electrode and the second electrode of the dielectric filter block are electrically connected by the two or more via-contacts and the at least one connecting wiring; and wherein the two via-contacts are formed at different places from each other in a plane view of the dielectric filter block. - View Dependent Claims (10, 11)
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Specification