Wireless transmitting and receiving antenna
US6476768B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2000 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Dec 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/362
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed is a wireless transmitting and receiving antenna which comprises a bobbin made of insulation material and having a first penetration cavity in the center of the bobbin in a lengthwise direction; a first antenna comprising a helical conductor spirally wound on the bobbin and having a resonance frequency, and a matching bar inserted into the cavity of the bobbin, made of a conductor and providing a second penetration cavity in the direction identical with that of the first penetration cavity; a feeder positioned at one part of the bobbin so as to supply signals to the helical conductor; and a second antenna comprising: a rod inserted into the penetration cavities of the bobbin and the matching bar, moving between the penetration cavities in a slipping manner, and wrapped with the insulation material; a conduction material combined to the outer part of the rod, and electrically connecting the feeder and the helical conductor when the rod is inserted into the penetration cavities; and a stopper which is made of a conductor, positioned at the lower part of the rod, and when the rod. is drawn Afro, the penetration cavity, the moving of the stopper is limited, and it is contacte…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.