# US 9,882,273 B2 · Buoyant helical twin-axial wire antenna

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,882,273 B2
- Document ID: US9882273B2
- Status: Granted
- Kind: B2
- Application number: 15/351,927
- Filed: 2016-11-15
- Published: 2017-03-02
- Granted: 2018-01-30
- Earliest claimed: 2014-05-19
- Assignees: The United States of America as represented by the Secretary of the Navy
- Applicants: David A Tonn
- Inventors: David A Tonn
- Web page: https://patentgrep.com/patent/US9882273B2

## CPC

- H01Q 1/34: Adaptation for use in or on ships, submarines, buoys or torpedoes (for subaqueous use H01Q1/04)
- H01Q 1/04: Adaptation for subterranean or subaqueous use
- H01Q 1/362: {for broadside radiating helical antennas}
- H01Q 1/48: Earthing means; Earth screens; Counterpoises
- H01Q 5/321: within a radiating element or between connected radiating elements
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

An antenna includes a polymer coating having a VLF/LF element and an HF/VHF element embedded therein. A blocking choke is interposed between the VLF/LF element and the antenna feed t block HF/VHF signals. Small chokes are regularly positioned on the VLF/LF element to eliminate resonances caused by mutual capacitance between the elements. Reactive loads are positioned in said HF/VHF element at regular intervals for optimizing performance of the antenna in the HF/VHF radio bands. In further embodiments the antenna is provided as a floating antenna with the elements helically arranged therein.

## Claims

### Claim 1

A buoyant antenna comprising:
a polymer foam coating;
a VLF/LF element embedded in said polymer foam coating having a first end being capable of joining to the antenna feed and a second end;
a grounding ring in contact with the environment and joined to said VLF/LF element second end for grounding said VLF/LF element;
an HF/VHF element embedded in said polymer foam coating and insulated from electrical contact with said VLF/LF element having a first end being capable of joining to the antenna feed and a second end isolated from said grounding ring and said VLF/LF element wherein said HF/VHF element and said VLF/LF element are helically positioned within said polymer foam coating about a center of said polymer foam coating with a constant pitch angle between said elements;
a blocking choke interposed between said VLF/LF element first end and the antenna feed for blocking HF and VHF radio signals from the VLF/LF element;
a plurality of small chokes regularly positioned on said VLF/LF element; and
a plurality of reactive loads positioned in said HF/VHF element at regular intervals for optimizing performance of the antenna in the HF/VHF radio bands.

### Claim 2 (depends on 1)

The apparatus of claim 1 wherein each said reactive loads comprises a capacitor.

### Claim 3 (depends on 2)

The apparatus of claim 2 wherein a portion of said reactive loads further comprise an inductor positioned in parallel with said capacitor.

### Claim 4 (depends on 1)

The apparatus of claim 1 wherein each said reactive load further comprises an inductor positioned in parallel with said capacitor.