Spiral microstrip antenna with resistance
First Claim
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1. A spiral microstrip antenna comprising:
- a ground plane;
a dielectric slab attached to said ground plane; and
a single layer comprising a plurality of spiral constant width arms, attached to said dielectric slab, each arm comprising a plurality of electrically resistive and conductive elements having resistance connected to each other, the resistance of each resistive element being matched to the resistance of the preceding elements along the arm, back toward the center of the spiral, to create a tapered gradually increasing resistance.
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Abstract
A spiral microstrip antenna having resistor elements embedded in each of the spiral arms is provided. The antenna is constructed using a conductive back plane as a base. The back plane supports a dielectric slab having a thickness between one-sixteenth and one-quarter of an inch. A square spiral, having either two or four arms, is attached to the dielectric slab. Each arm of the spiral has resistor elements thereby dissipating an excess energy not already emitted through radiation. The entire configuration provides a thin, flat, high gain, wide bandwidth antenna which requires no underlying cavity. The configuration allows the antenna to be mounted conformably on an aircraft surface.
30 Citations
7 Claims
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1. A spiral microstrip antenna comprising:
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a ground plane; a dielectric slab attached to said ground plane; and a single layer comprising a plurality of spiral constant width arms, attached to said dielectric slab, each arm comprising a plurality of electrically resistive and conductive elements having resistance connected to each other, the resistance of each resistive element being matched to the resistance of the preceding elements along the arm, back toward the center of the spiral, to create a tapered gradually increasing resistance. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification