Dual band antenna
US5812097A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1996 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Apr 30, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q5/40
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A novel and improved dual band antenna system comprising an inner antenna element surrounded by an outer antenna element. In a first embodiment, the inner antenna element radiates and receives RF signals in a first RF band, and the outer antenna element radiates and receives RF signals in a second RF band. Optionally, the inner and outer antennas may be coupled together when operating in the first RF band in order to improve the antenna gain pattern of the dual band antenna. In a second embodiment, the inner antenna element radiates and receives RF signals in both the first and second RF bands. In this second embodiment, when operating in the second RF band, the outer antenna element is grounded, thus altering the signal length of the inner antenna element to resonate in the second RF band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.