Dual hybrid-fed patch element for dual band circular polarization radiation
US6424299B1 · kind B1 · utility
10Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2001 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Aug 9, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0435
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dual-band patch antenna element (10) for circular or linear polarization. The patch element (10) is excited by two different hybrids (22, 24), designed for transmit and receive bands respectively. Each hybrid (22, 24) electromagnetically couples a pair of orthogonal ground plane slots (26, 28, 30, 32) that excite the patch antenna (10). The hybrid (22) and slot (26, 28) dimensions for the transmit band are different from the hybrid (24) and slot (30, 32) dimensions for the receive band. Isolation can be improved by connecting shunt stubs (34, 36) to the hybrids (22, 24).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.