Curved microstrip antennas
First Claim
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1. A low profile antenna adapted to send and/or receive circuitry polarized waves and constructed so as to exhibit a substantially constant input impedance over a predetermined frequency range, the combination comprising:
- a ground surface, at least a section of which is conically shaped;
a single strip conductive means positioned over said ground surface, a portion of said conductive means exhibiting a gradually increasing width from a feed point, said portion juxtaposed over said conically shaped section of said ground surface; and
signal feed means connected to said feed point.
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Abstract
A thin planar curved microstrip antenna is described which exhibits substantially constant input impedance characteristics over a wide frequency band. The impedance characteristic is achieved by shaping the ground surface such that the ratio of the width of the radiating element to its distance from the ground surface stays constant for a given curvature.
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Citations
7 Claims
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1. A low profile antenna adapted to send and/or receive circuitry polarized waves and constructed so as to exhibit a substantially constant input impedance over a predetermined frequency range, the combination comprising:
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a ground surface, at least a section of which is conically shaped; a single strip conductive means positioned over said ground surface, a portion of said conductive means exhibiting a gradually increasing width from a feed point, said portion juxtaposed over said conically shaped section of said ground surface; and signal feed means connected to said feed point. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification