Planar antenna
US5410323A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1993 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Apr 19, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0428
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A planar antennas has a square radiating conductor with a total of eight slits defined therein. Each of the slits extends from one side of the radiating conductor parallel to opposing sides flanking the one side. The slits are positioned such that they slits remain in the same pattern when the radiating conductor is turned 90.degree.. Any changes in the impedance as the offset length of a feeding point from the center of the planar antenna are relatively small, specifically range from 0 ohm to 400 ohm. The planar antenna is small in size, is easy to achieve impedance matching with a general feeding system having an impedance of 50 ohms, for example, and has wider frequency band. The planar antenna is also capable of generating circularly polarized electromagnetic waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.