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:
Apr. 23, 2002
Filed:
Jul. 07, 2000
Bruce Silverstein, Petach Tikva, IL;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An enhanced antenna apparatus suitable for use with portable wireless devices. The antenna of the present invention comprises a conductive sleeve having an inner core that can accommodate one or more signal wires passing therethrough. The conductive sleeve functions as the radiating element of the antenna. The length of the conductive sleeve is made an integer multiple of one half the wavelength of the desired frequency. By passing the signal wires through the conductive sleeve the mutual impedance between the antenna itself and signal wires passing through the antenna is eliminated. Alternatively, the antenna can be constructed on a printed circuit board using elongated printed pattern on the top and bottom layers of the printed circuit board. The length of the printed pattern is made an integer multiple of one half wavelength of the desired frequency. One or more signal traces pass under and between the printed antenna patterns on middle layers of the board which functions to eliminate the mutual impedance between the printed antenna and the signal traces.