Methods and apparatus for implementation of an antenna for a wireless communication device
US7205944B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 20, 2005 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Oct 20, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0471
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireless communication device includes an antenna configured with two conductive elements separated by an insulating medium. One conductive element is a ground plane and the other is a microstrip line. The ground plane is formed with a bend proximate an end. The microstrip line and the ground plane exhibit a characteristic impedance that may vary along the length of the microstrip line. The separation distance of the microstrip line from the ground plane is changed to reduce the resonant frequency of the microstrip line. A second microstrip line with an open end and another end shorted to the ground plane is operative to prevent RF current from flowing on the backside of the ground plane. A backside of the ground plane and the second microstrip line may be covered with a lossy magnetic medium to reduce the near field above the backside of the ground plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.