Laser-induced plasma filaments for communication
US-10069564-B2 · Sep 4, 2018 · US
Antenna extended with a laser induced plasma
US11942679B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11942679-B2 |
| Application number | US-202217894737-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 24, 2022 |
| Priority date | Aug 24, 2022 |
| Publication date | Mar 26, 2024 |
| Grant date | Mar 26, 2024 |
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Abstract
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An antenna extender and an antenna extended with a laser induced includes a laser source and an antenna feed. The laser source is capable of emitting a laser beam along an axis with sufficient power to produce a laser induced plasma in an atmosphere along the axis of the laser beam. The antenna feed extends along the axis for coupling between a radiofrequency signal and the laser induced plasma. The antenna feed extended with the laser induced plasma has an enhanced radiation efficiency for the radiofrequency signal that is greater than the antenna feed that is not extended and has a stub radiation efficiency for the radiofrequency signal when the laser source is deactivated and does not emit the laser beam.
First claim
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We claim: 1. An antenna extender comprising: a laser source for emitting a laser beam along an axis of the laser beam with sufficient power to produce a laser induced plasma in an atmosphere along the axis of the laser beam; and an antenna feed extending along the axis of the laser beam for coupling between a radiofrequency signal and the laser induced plasma, wherein the antenna feed includes metal disposed within the laser induced plasma, and wherein the antenna feed extended with the laser induced plasma has an enhanced radiation efficiency for the radiofrequency signal that is greater than the antenna feed that is not extended and has a stub radiation efficiency for the radiofrequency signal when the laser source is deactivated and does not emit the laser beam. 2. The antenna extender of claim 1 , wherein the laser source is arranged to emit the laser beam that is coaxial along the axis of the laser beam with the metal of the antenna feed. 3. The antenna extender of claim 1 , wherein the enhanced radiation efficiency for the radiofrequency signal is greater than the stub radiation efficiency for the radiofrequency signal because the antenna feed extended with the laser induced plasma has greater radiation efficiency for radiating the radiofrequency signal than the antenna feed that is not extended. 4. The antenna extender of claim 1 , wherein the antenna feed comprises a coating of a low work function material. 5. The antenna extender of claim 4 , wherein the low work function material comprises lanthanum oxide.
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- What does patent US11942679B2 cover?
- An antenna extender and an antenna extended with a laser induced includes a laser source and an antenna feed. The laser source is capable of emitting a laser beam along an axis with sufficient power to produce a laser induced plasma in an atmosphere along the axis of the laser beam. The antenna feed extends along the axis for coupling between a radiofrequency signal and the laser induced plasma…
- Who is the assignee on this patent?
- Us Navy, Usa As Represented By The Secretary Of The Navy
- What technology area does this patent fall under?
- Primary CPC classification H01Q1/26. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 26 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).