Antenna device comprising capacitively coupled radiating elements and a hand-held radio communication device for such antenna device
US6400339B1 · kind B1 · utility
26Cited by
16References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 17, 1999 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | May 17, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q11/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The object of the present invention is to achieve an antenna for both receiving and transmitting circularly polarized RF signals which is smaller and lighter than prior art antennas as well as to achieve one antenna for both receiving and transmitting circularly polarized RF signals which has better characteristics for a given physical length than prior art antennas. This is achieved by providing an N-helical-filar antenna with N radiating elements coaxially arranged and defining a cylindrical envelope where each individual radiating element is capacitively coupled to another radiating element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.