Monopole antenna
First Claim
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1. A monopole antenna comprising:
- a ground plane;
a flat conductor faced to the ground plane and separated from the ground plane by a predetermined clearance, the flat conductor having an inner conductor and an outer conductor that is disposed around the inner conductor and separated from the inner conductor by another predetermined clearance;
a linear conductor coupled to the flat conductor, the linear conductor extending on a ground plane side in an insulated state from the ground plane and being coupled to a feeding point; and
at least one coupling conductor located at a region of the another predetermined clearance and inter-coupling an outer edge of the inner conductor and an inner edge of the outer conductor,wherein the coupling conductor is formed with a set angle with respect to a center of the flat conductor, and the coupling conductor resonates with a resonance frequency depending on the set angle.
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Abstract
A monopole antenna is formed of a ground plane, a flat conductor faced to the ground plane and separated from it by a clearance “H”, and a linear conductor that is connected to the flat conductor, extended on the ground plane side in an insulated state from the ground plane, and connected to a signal source. The flat conductor is formed of an inner conductor, and outer conductors disposed on the outer periphery of the inner conductor at a predetermined interval. Set regions of the outer edge of the inner conductor and the inner edges of the outer conductors are interconnected through one or more coupling conductors.
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Citations
8 Claims
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1. A monopole antenna comprising:
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a ground plane; a flat conductor faced to the ground plane and separated from the ground plane by a predetermined clearance, the flat conductor having an inner conductor and an outer conductor that is disposed around the inner conductor and separated from the inner conductor by another predetermined clearance; a linear conductor coupled to the flat conductor, the linear conductor extending on a ground plane side in an insulated state from the ground plane and being coupled to a feeding point; and at least one coupling conductor located at a region of the another predetermined clearance and inter-coupling an outer edge of the inner conductor and an inner edge of the outer conductor, wherein the coupling conductor is formed with a set angle with respect to a center of the flat conductor, and the coupling conductor resonates with a resonance frequency depending on the set angle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification