Asymmetrically fed electric microstrip dipole antenna
First Claim
1. An asymmetrically fed electric microstrip dipole antenna having low physical profile and conformal arraying capability, comprising:
- a. a thin ground plane conductor;
b. a thin rectangular radiating element spaced from said ground plane;
c. said radiating element being electrically separated from said ground plane by a dielectric substrate;
d. said radiating element having a feed point located along the centerline of the length thereof;
e. said radiating element being fed from a coaxial-to-microstrip adapter, the center pin of said adapter extending through said ground plane and dielectric substrate to said radiating element;
f. the length of said radiating element determining the resonant frequency of said antenna;
g. the antenna input impedance being variable to match most practical impedances as said feed point is moved along said centerline between the antenna radiating element center point and the end of the radiating element in either direction without affecting the antenna radiation pattern;
h. the antenna bandwidth being variable with the width of the radiating element and the spacing between said radiating element and said ground plane, said spacing between the radiating element and the ground plane having somewhat greater effect on the bandwidth than the element width.
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Abstract
An asymmetrically fed electric microstrip dipole antenna consisting of a n electrically conducting, rectangular-shaped element formed on one surface of a dielectric substrate, the ground plane being on the opposite surface. The length of the element determines the resonant frequency. The feed point is located along the centerline of the antenna length and the input impedance can be varied by moving the feed point along the centerline from the center point to the end of the antenna without affecting the radiation pattern. The antenna bandwidth increases with the width of the element and spacing between the element and ground plane.
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Citations
11 Claims
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1. An asymmetrically fed electric microstrip dipole antenna having low physical profile and conformal arraying capability, comprising:
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a. a thin ground plane conductor; b. a thin rectangular radiating element spaced from said ground plane; c. said radiating element being electrically separated from said ground plane by a dielectric substrate; d. said radiating element having a feed point located along the centerline of the length thereof; e. said radiating element being fed from a coaxial-to-microstrip adapter, the center pin of said adapter extending through said ground plane and dielectric substrate to said radiating element; f. the length of said radiating element determining the resonant frequency of said antenna; g. the antenna input impedance being variable to match most practical impedances as said feed point is moved along said centerline between the antenna radiating element center point and the end of the radiating element in either direction without affecting the antenna radiation pattern; h. the antenna bandwidth being variable with the width of the radiating element and the spacing between said radiating element and said ground plane, said spacing between the radiating element and the ground plane having somewhat greater effect on the bandwidth than the element width. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification