Antenna
US6690336B1 · kind B1 · utility
84Cited by
59References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1999 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Jun 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q11/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dielectric-loaded antenna having a plurality of radiating elements and a loop element plated on the surface of a cylindrical ceramic core has balanced and single-ended modes of resonance which are coupled together so as to define an operating frequency band. The two modes of resonance are associated with different respective radio frequency current patterns in the radiating elements, and the input reactance component of the load represented by the antenna at its feedpoint is substantially zero within the operating frequency band only when the corresponding input resistance component is finite and substantially non-zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.