Antenna equipment
US5617105A · kind A · utility
26Cited by
9References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1994 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Sep 23, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q5/40
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A rod antenna element is connected at its lower end to one end of a coaxial impedance converter, the other end of which is connected to a feeder. A coil antenna element is capacitively coupled to the rod antenna element to provide a double resonance characteristic. When held at its retracted position, the rod antenna element, inserted in an outer conductor of the coaxial impedance converter, may preferably form an inner conductor larger in diameter than that when the rod antenna element is at its extended-out position, and the rod antenna element is connected to a coil antenna element with a low impedance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.