Difference drive diversity antenna structure and method
US6175334A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1999 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | Apr 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A difference drive diversity antenna structure (200) and method for a portable wireless communication device (230) aligns a first linear antenna (240) parallel to a major axis (245) of the communication device and drives dual radiators (252, 254) of a second antenna (250) at equal magnitudes but with a 180 degree phase difference. A difference drive diversity antenna structure implemented in a portable wireless communication device maintains significant decorrelation between the first antenna (240) and the second antenna (250) over the common frequency ranges of the dual radiators (252, 254). Also, antenna currents on the body of the communication device are minimized and the effects of a hand or body near the communication device are reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.