# US 5,706,018 A · Multi-band, variable, high-frequency antenna

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

- Number: US 5,706,018 A
- Document ID: US5706018A
- Status: Granted
- Kind: A
- Application number: 08/668,190
- Filed: 1996-06-21
- Granted: 1998-01-06
- Earliest claimed: 1996-06-21
- Inventors: Norbert E. Yankielun
- Web page: https://patentgrep.com/patent/US5706018A

## CPC

- H01Q 9/16: with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole (H01Q9/44 takes precedence)
- H01Q 9/14: Length of element or elements adjustable (telescopic elements H01Q1/10)
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

A multi-band, variable, high-frequency antenna comprises a pair of transmission lines for conveyance of signals from and to a transceiver, and a pair of braided copper conductor elements, each in electrical communication at a proximal end thereof with one of the transmission lines. Each of the braided copper conductor elements is mounted on a non-conductive support cord, the braided copper conductor elements being expandable and retractable along the support cords on which the conductor elements are mounted. A cord lock is proximate a distal end of each of the conductor elements for releasably locking the distal end of the conductor element at a selected position on the support cord on which the conductor element is mounted. Release of the cord locks permits lengthening and shortening of the braided copper conductor elements, and locking of the cord locks is operative to lock the conductor elements in place on the support cords to selectively fix a length of each of the conductor elements.

## Claims

### Claim 1

A multi-band, variable, high-frequency antenna comprising:
a pair of transmission lines for conveyance of signals from and to a transceiver;
a pair of braided copper conductor elements each in electrical communication at a proximal end thereof with one of said transmission lines;
each of said braided copper conductor elements being mounted on a non-conductive support cord;
said braided copper conductor elements being expandable and retractable along the support cords on which said conductor elements are mounted; and
a cord lock proximate a distal end of each of said conductor elements for releasably locking said distal end of said conductor element at a selected position on said support cord on which said conductor element is mounted, release of said cord locks permitting lengthening and shortening of said braided copper conductor elements, and locking of said cord locks being operative to lock said conductor elements in place on said support cords to selectively fix a length of each of said conductor elements.

### Claim 2 (depends on 1)

The antenna in accordance with claim 1 wherein said braided copper conductor elements each are connected to one of said transmission lines.

### Claim 3 (depends on 1)

The antenna in accordance with claim 1, said antenna further comprising a pair of center elements each connected to one of said transmission lines, and wherein each of said braided copper conductor elements is connected at a proximal end thereof to one of said center elements to provide a center element and a braided conductor element in combination, and said locking of said conductor elements in place on said support cords selectively fixes a length of each of said center element and braided conductor element combinations.

### Claim 4 (depends on 1)

The antenna in accordance with claim 1 wherein said support cords are provided with visible marks thereon for guidance as to available lengths of said braided copper conductor elements.