Method and system for improving isolation in radio-frequency antennas
US6624789B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2002 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | May 1, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0421
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In an antenna structure having a transmit antenna disposed over a first section of a ground plane and a receive antenna disposed over a second section of the ground plane, a cut is provided between the first and second sections of the ground plan The length of the cut is substantially equal to one quarter-wavelength of the operating frequency band of transmit/receive antenna pair so as to provide isolation between the transmit antenna and the receive antenna. If the antenna structure also has a transceiver antenna operated in a further frequency band disposed over the same ground plane and straddling over the first section and the second section, a switch is provided over the cut. The switch is operating in a closed position when the transceiver antenna in the further frequency band is used, and in an open position when the transmit/receiver antenna pair is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.