Hybrid antenna arrangement for use with electronic identification systems
US6346922B1 · kind B1 · utility
31Cited by
15References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2000 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Feb 1, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dipole antenna 34 comprises a loop 36 as a first pole and an appendage 42 comprising a strip 44 terminating in a pad 46 as a second pole. The circumference of the loop is in the order of one half-wavelength of an operating frequency and an effective length of the appendage is at least 0.15 times the wavelength. The dipole antenna 34 is shorter than conventional half-wavelength dipole antennas, has a better frequency response and the antenna impedance ZA is dependent on the position of a feedpoint 38 in the loop 36. The antenna may be used with transponders for electronic radio frequency identification systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.