Apparatus for receiving and transmitting radio signals
US6252549A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1998 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Feb 24, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q13/18
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna unit transmit and receives radio signals having two different polarizations. The antenna unit includes a slot integrated in a microstrip element and an aperture integrated in a conductive surface on the microstrip element. The aperture is arranged in the conductive surface parallel to its polarization direction. The slot is arranged in an underlying layer directly below the aperture. The conductive surface of the microstrip element is arranged to transmit or receive with a vertical polarization and a first horizontal beam width. The slot is arranged to transmit or receive with a horizontal polarization and a second horizontal beam width. The second beam width is substantially equal to the first beam width. The antenna unit is very compact and light and only causes low power losses. A number of antenna units can be used to design sector antennas or antenna arrays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.