The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 2001
Filed:
Apr. 07, 1998
John M. Cosenza, St. James, NY (US);
Hirschmann Electronics, Inc., Pine Brook, NJ (US);
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 band, such that the one-half PCS and the one-quarter PCS wavelength radiating portions behave as a one-half wavelength over one-quarter wavelength radiating element in the PCS band.