Omnidirectional antenna formed one or two antenna elements symmetrically to a ground conductor
First Claim
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1. An antenna, comprising:
- a ground conductor plate;
a first antenna element opposed to a first surface of said ground conductor plate;
a second antenna element opposed to a second surface of said ground conductor plate; and
a feed line time electromagnetically coupling and feeding both said first antenna element and said second antenna element.
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Abstract
On respective ground conductor plate surfaces, first and second dielectric substrates are formed. First and second antenna elements made of a conductor film of a rectangular cooper leaf or the like are formed on opposite surfaces of the first and second dielectric substrates to the ground conductor plate. The first and second antenna elements-are fed by, for example, a coplanar waveguide feed line, slot feed or the like. Thus, an omnidirectional antenna is realized having simple construction, reducing a size and production cost.
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Citations
15 Claims
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1. An antenna, comprising:
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a ground conductor plate; a first antenna element opposed to a first surface of said ground conductor plate; a second antenna element opposed to a second surface of said ground conductor plate; and a feed line time electromagnetically coupling and feeding both said first antenna element and said second antenna element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An antenna comprising:
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a pillar-shaped ground conductor; a cylindrical dielectric substrate formed surrounding said ground conductor; a plurality of cylindrical antenna element formed on an inside surface of said dielectric substrate; and a feed means for feeding said antenna element; wherein a plurality of said antenna elements are fed by an electromagnetic coupling feeding via one continuous feed line of the feed means.
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13. An antenna comprising:
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a pillar-shaped ground conductor; a cylindrical dielectric substrate formed surrounding said ground conductor; a plurality of cylindrical antenna element formed on an inside surface of said dielectric substrate; and a feed means for feeding said antenna elements; wherein adjacent antenna elements of a plurality of said antenna elements are fed by an electromagnetic coupling feeding via independent coplanar feed lines of the feed means.
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14. An antenna comprising:
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a pillar-shaped ground conductor; a cylindrical dielectric substrate formed surrounding said ground conductor; a plurality of cylindrical antenna element formed on an inside surface of said dielectric substrate; and a feed means for feeding said antenna elements; 659 wherein said ground conductor is tube-shaped; and
a plurality of said antenna elements are fed by an electromagnetic coupling feeding via one feed line of the feed means disposed within said ground conductor and via slot portions disposed on said ground conductor.
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15. An antenna, comprising:
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a ground conductor plate; a plurality of first antenna elements opposed to a first surface of said ground conductor plate; a plurality of second antenna elements opposed to a second surface of said ground conductor plate; and a feed means for feeding said first antenna elements and said second antenna elements, wherein said first antenna elements and said second antenna elements are formed at predetermined intervals along longer sides of said feed means so that the antenna has radiation directivity beam-tilted to a predetermined vertical direction.
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Specification