Multiband antenna with a distributed-constant dielectric resonant circuit as an LC parallel resonant circuit, and multiband portable radio apparatus using the multiband antenna
US6011516A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 30, 1996 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Oct 30, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q5/321
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multiband antenna comprises an antenna device which is resonant at two or more different frequencies. The antenna device comprises a first antenna rod (7), a second antenna rod (8), and a distributed-constant dielectric resonator which is a coaxial dielectric resonator (1A) comprising a dielectric block (1A1). The first antenna rod (7) is electrically connected to an inner conductor (4) covering the inner surface of the dielectric block (1A1). The second antenna rod (8) is electrically connected to an outer conductor (5) covering an outer periphery of the dielectric block (1A1). In another structure, the dielectric resonator is a triplate dielectric resonator (1B) comprising two dielectric plates (1B1). The first antenna rod (7) is electrically connected to a center conductor (6) interposed between the dielectric plates (1B1). The second antenna rod (8) is electrically connected to outer conductors (5) covering the dielectric plates (1B1) at the side opposite to the center conductor (6).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.