Antenna arrangement for mobile radiotelephones
US6542126B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2001 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Jun 8, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0442
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A flat antenna arrangement (plate antenna arrangement, patch antenna arrangement) with an earth plate and a radiator that is disposed at a distance essentially parallel to the earth plate and is conductively connected to the latter by one of its end regions, wherein, at a first (lower) resonant frequency of the antenna arrangement, a voltage minimum is present at the connection of the radiator to the earth plate and in the region of the other end (unsupported end) of the radiator a first voltage maximum is present, is characterized in that there is disposed between the radiator (3) and the earth plate (2) near the unsupported end of the radiator (3) a settable switch element (11) that is designed in such a way that it is capable of making a connection having a low impedance, and in that the point at which the switch element is connected to the radiator (3) is disposed in such a way that, with the switch element (11) set to conduct, the radiator (3) has a desired second resonant frequency that is higher than the first resonant frequency. It is advantageous that the entire or almost the entire radiator radiates in the two frequency ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.