Surface mount antenna, method of manufacturing the surface mount antenna, and radio communication apparatus equipped with the surface mount antenna
First Claim
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1. A surface mount antenna comprising:
- a substrate; and
a radiation electrode disposed on the substrate and arranged to perform an antenna function;
wherein the radiation electrode is disposed on four continuously connected surfaces of the substrate including a top surface, a bottom surface, and two shorter edge surfaces of the substrate, thereby defining a configuration in which the radiation electrode essentially surrounds an outer circumference of the substrate;
a slit is formed in the radiation electrode in a direction intersecting an outer circumference of the substrate and extends across the whole width of the radiation electrode;
at least one of two electrode ends located close to each other with the slit interposed therebetween is cut for adjusting the resonance frequency of the radiation electrode; and
the radiation electrode extends across substantially an entire width of the substrate.
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Abstract
A surface mount antenna includes a substrate and a radiation electrode (having a predetermined resonance frequency) disposed on the substrate. An electrode is formed to cover four continuously connected surfaces including the front surface, the front end surface, the rear surface and the rear end surface of each substrate. Then, a dicer is used to cut a slit on the radiation electrode formed on the surface of the dielectric substrate. Here, the slit is arranged in a direction intersecting a direction α connecting the two end surfaces. Subsequently, the dielectric substrate is cut into a plurality of portions along the direction α, thus producing a plurality of surface mount antennas each including a substantially rectangular substrate and a radiation electrode formed essentially surrounding an outer circumference of the substrate.
90 Citations
25 Claims
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1. A surface mount antenna comprising:
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a substrate; and
a radiation electrode disposed on the substrate and arranged to perform an antenna function;
whereinthe radiation electrode is disposed on four continuously connected surfaces of the substrate including a top surface, a bottom surface, and two shorter edge surfaces of the substrate, thereby defining a configuration in which the radiation electrode essentially surrounds an outer circumference of the substrate;
a slit is formed in the radiation electrode in a direction intersecting an outer circumference of the substrate and extends across the whole width of the radiation electrode;
at least one of two electrode ends located close to each other with the slit interposed therebetween is cut for adjusting the resonance frequency of the radiation electrode; and
the radiation electrode extends across substantially an entire width of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of manufacturing a surface mount antenna, comprising the steps of:
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providing a substrate;
forming an electrode to entirely cover top and bottom surfaces as well as two mutually opposite shorter edge surfaces of the substrate;
forming a slit in the electrode disposed on the surface of the substrate, the slit being formed by cutting with a dicer and so as to extend in a direction intersecting a direction connecting the two shorter edge surfaces;
cutting the dielectric substrate into a plurality of portions, using a dicer which cuts along the direction connecting the two shorter edge surfaces; and
producing a plurality of surface mount antennas each including a substantially rectangular substrate and a radiation electrode disposed so as to essentially surround the substantially rectangular substrate;
whereinwhen the dicer is used to cut the slit so that the slit is formed on the electrode attached to the surface of the substrate, said slit is formed in a position and has a width both corresponding to a predetermined resonance frequency of the radiation electrode of a surface mount antenna. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of manufacturing a surface mount antenna, comprising the steps of:
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providing a substrate;
forming a first electrode to entirely cover a bottom surface and two mutually opposed shorter edge surfaces of the substrate;
forming on a top surface of the substrate second electrode having a slit formed in a direction intersecting a direction connecting the two shorter edge surfaces;
cutting the substrate into a plurality of portions, using a dicer which cuts along the direction connecting the two shorter edge surfaces; and
producing a plurality of surface mount antennas each including a substantially rectangular substrate and a radiation electrode disposed so as to essentially surround the substantially rectangular substrate;
whereinbefore the substrate is cut by a dicer into a plurality of portions, at least one of two electrode ends located close to each other with the slit interposed therebetween is cut by the dicer, so as to adjust the resonance frequency of the radiation electrode of each surface mount antenna to a predetermined resonance frequency. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification
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Current AssigneeMurata Manufacturing Co Limited
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Original AssigneeMurata Manufacturing Co Limited
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InventorsKushihi, Yuichi
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Primary Examiner(s)CHEN, SHIH CHAO
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Application NumberUS10/170,469Publication NumberTime in Patent Office739 DaysField of Search343/700.MS, 343/702, 343/846, 343/848, 343/873US Class Current343/700.0MSCPC Class CodesH01Q 1/2283 mounted in or on the surfac...H01Q 1/243 with built-in antennasH01Q 1/38 formed by a conductive laye...H01Q 13/10 Resonant slot antennas
