Multi-frequency hidden antenna for mobile phones
US6573866B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2001 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Aug 29, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/36
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multi-frequency hidden antenna for mobile phones, the electric circuit board of the antenna has on the front side thereof two separated grounding areas and an electric supplying line of a single-pole antenna of ¼&lgr;, the open circuit end of the electric supplying line is in the shape of an inverted triangle in a way to form a loaded coplanar waveguide antenna. The electric circuit board is further provided on the rear side thereof with a grounding area, while the electric supplying line on the front side thereof is provided with a short circuit portion of which harmonic oscillation frequency is adjustable in order to form a planar inverted F-antenna (PIFA) to be used together with said coplanar waveguide antenna. Thereby a multi-frequency hidden antenna is formed which can improve bandwidth, radiation efficiency and gain during making coplanar of and miniaturizing the hidden antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.