U-shaped multi-frequency antenna of high efficiency
US6850199B2 · kind B2 · utility
3Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2003 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Jun 11, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A U-shaped multi-frequency antenna of high efficiency, the antenna has a common feed line connected with an inner and an outer U-shaped wire in symmetrical forms respectively to decide impedance bandwidths of frequency bands selected, and has a balanced circuit of the structure of a Balun circuit having a gradually tapered microstrip to harmonize the impedance bandwidths. Thereby such an omni-directional multi-frequency antenna with a high gain and a bandwidth can be conveniently manufactured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.