Small planar antenna with enhanced bandwidth and small rectenna for RFID and wireless sensor transponder
US7262740B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2005 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Nov 5, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q13/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A small planar antenna with an enhanced bandwidth and a small rectenna for RFID (Radio Frequency Identification) and wireless sensor transponder are provided. The small planar antenna includes a dielectric substrate, a metal layer formed on an upper part of the dielectric substrate, a main slot formed in pattern on the metal layer, and a plurality of sub-slots connected to the main slot and winding in a specified direction, and the plurality of sub-slots form a pair of symmetric sub-slot groups around the main slot. According to the small planar antenna, the antenna region that substantially takes part in the radiation is substantially increased, and thus an enhanced bandwidth can be obtained without affecting the radiation pattern, radiation efficiency, polarization purity, etc., of the antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.