Coupled multilayer microstrip antenna
First Claim
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1. A coupled multilayer microstrip antenna for improving antenna radiation pattern characteristics, comprising:
- a. a thin ground plane conductor;
b. a first thin planar conducting microstrip radiating element (parasitic element) being spaced from and parallel to said ground plane;
c. said parasitic element being separated from said ground plane by a first dielectric substrate;
d. a second thin planar conducting microstrip radiating element (driven element) being spaced from and parallel to said parasitic element such that said parasitic element is located between said ground plane and said driven element;
e. said driven element being separated from said parasitic element by a second dielectric substrate;
f. said driven element and said parasitic element each being tuned to the same frequency;
g. said driven element having at least one feed point located thereon;
said feed point being directly coupled to and fed energy from a microwave transmission line;
h. said parasitic element being parasitically coupled to the driven element without any direct connection thereto;
said parasitic element operating to cancel the image field as seen by the driven element to provide enhanced radiation at angles closer to said ground plane.
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Abstract
A coupled multilayer microstrip antenna having an upper and a lower microip element tuned to the same frequency, and separated from each other by a dielectric substrate. The pair of elements is located over a suitable ground plane and separated from the ground plane by a second dielectric substrate. The upper element is the driven element which is directly coupled to the feed line while the lower element is parasitically coupled to upper element. The lower element cancels the image field as seen by the upper element providing enhanced radiation at angles closer to the ground plane.
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12 Claims
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1. A coupled multilayer microstrip antenna for improving antenna radiation pattern characteristics, comprising:
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a. a thin ground plane conductor; b. a first thin planar conducting microstrip radiating element (parasitic element) being spaced from and parallel to said ground plane; c. said parasitic element being separated from said ground plane by a first dielectric substrate; d. a second thin planar conducting microstrip radiating element (driven element) being spaced from and parallel to said parasitic element such that said parasitic element is located between said ground plane and said driven element; e. said driven element being separated from said parasitic element by a second dielectric substrate; f. said driven element and said parasitic element each being tuned to the same frequency; g. said driven element having at least one feed point located thereon;
said feed point being directly coupled to and fed energy from a microwave transmission line;h. said parasitic element being parasitically coupled to the driven element without any direct connection thereto;
said parasitic element operating to cancel the image field as seen by the driven element to provide enhanced radiation at angles closer to said ground plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification