Dual band antenna
US6191747A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1998 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Apr 7, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q5/321
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In one preferred embodiment, a dual band antenna having a radiating element which includes: a one-quarter PCS wavelength radiating portion which serves as a base; a one-half PCS wavelength radiating portion; a PCS phasing coil joining the one-quarter PCS wavelength radiating portion to the one-half PCS wavelength radiating portion, wherein the PCS phasing coil substantially allows energy in the AMPS band to pass therethrough; a one-half AMPS wavelength radiating portion; and an AMPS phasing coil joining the one-half AMPS wavelength radiating portion to the one-half PCS wavelength radiating portion, wherein the AMPS phasing coil substantially prevents energy in the PCS band from passing therethrough, and wherein the AMPS phasing coil provides a 180 degree phase shift for energy in the AMPS band. Thus, the one-quarter PCS and the one-half PCS wavelength radiating portions together behave as a one-quarter wavelength radiating sub-element for energy in the AMPS band, and the radiating element behaves as a one-half wavelength over one-quarter wavelength radiating element in the AMPS band. Furthermore, the one-half AMPS wavelength radiating portion is substantially inactive in the PCS ba…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.