Aperture matched polyrod antenna
First Claim
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1. A polyrod antenna comprising:
- a dielectric polyrod having a first end; and
a waveguide for receiving the first end of the dielectric polyrod,wherein the waveguide has a first waveguide surface facing a flange and a second waveguide surface oppositely facing away from the first waveguide surface,wherein the dielectric polyrod comprises a short tapered section, a long tapered section, and an intermediate section,wherein the short tapered section is extended between the intermediate section and the first end, wherein the long tapered section is extended between the intermediate section and a second end oppositely facing the first end, wherein the long tapered section is tapered along a curve, andwherein the waveguide has an inductive tuning element disposed at an inductive tuning distance away from the second waveguide surface.
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Abstract
A dielectric polyrod having at least one tapered section, where a section exposed outside of the waveguide is tapered a long a curve that depends on the dielectric constant of the material used. The invention also relates to an aperture matched polyrod antenna which includes the same and an inductive tuning element used to achieve wideband impedance match and to create a Gaussian beam in the radiating near field of the antenna, suitable to mimic a small region plane wave.
231 Citations
14 Claims
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1. A polyrod antenna comprising:
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a dielectric polyrod having a first end; and a waveguide for receiving the first end of the dielectric polyrod, wherein the waveguide has a first waveguide surface facing a flange and a second waveguide surface oppositely facing away from the first waveguide surface, wherein the dielectric polyrod comprises a short tapered section, a long tapered section, and an intermediate section, wherein the short tapered section is extended between the intermediate section and the first end, wherein the long tapered section is extended between the intermediate section and a second end oppositely facing the first end, wherein the long tapered section is tapered along a curve, and wherein the waveguide has an inductive tuning element disposed at an inductive tuning distance away from the second waveguide surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A polyrod antenna comprising:
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a dielectric polyrod having a first end; and a waveguide for receiving the first end of the dielectric polyrod, wherein the waveguide has a first waveguide surface facing a flange and a second waveguide surface oppositely facing away from the first waveguide surface, wherein the dielectric polyrod comprises a short tapered section, a long tapered section, and an intermediate section, wherein the short tapered section is extended between the intermediate section and the first end, wherein the long tapered section is extended between the intermediate section and a second end oppositely facing the first end, wherein the long tapered section is tapered along a curve, and wherein the waveguide comprises a first inductive tuning element disposed at a first inductive tuning distance away from the second waveguide surface, and a second inductive tuning element disposed at a second inductive tuning distance away from the first inductive tuning element and toward the first waveguide surface. - View Dependent Claims (10, 11, 12)
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13. A polyrod antenna comprising:
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a dielectric polyrod having a first end; and a waveguide for receiving the first end of the dielectric polyrod, wherein the waveguide has a first waveguide surface facing a flange and a second waveguide surface oppositely facing away from the first waveguide surface, wherein the dielectric polyrod comprises a short tapered section, a long tapered section, and an intermediate section, wherein the short tapered section is extended between the intermediate section and the first end, wherein the long tapered section is extended between the intermediate section and a second end oppositely facing the first end, wherein the long tapered section is tapered along a curve, and wherein the waveguide comprises an inductive tuning element comprises a plurality of matching pins spaced apart by an interval distance, wherein each of the pins has a pin diameter, wherein a first pin of the pins is disposed at a 2-pin diameter distance away from a first side wall of the waveguide, a second pin of the pins is disposed 1-pin diameter away from the first pin, a third pin of the pins is disposed at a 2-pin diameter distance away from a second side wall of the waveguide, and a fourth pin of the pins disposed 1-pin diameter away from the third pin. - View Dependent Claims (14)
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Specification