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:
Nov. 04, 2003
Filed:
Apr. 08, 2002
Eric S. Gustafson, Tucson, AZ (US);
Other;
Abstract
A low loss, compact radio antenna and antenna loading method. For a monople antenna a tubular, conductive radiating element provided whose length is less than one-quarter the wavelength of the nominal frequency of the antenna. A tubular conductive series loading element disposed within the radiating element, the series loading element having a first end for connection to a radio and being electrically connected to the radiating element at a position spaced outwardly from the first end so as to provide inductance in series with the radiating element. An elongate conductive shunt matching element is disposed within the series loading element for electrically connecting the series loading element from a point therein to a mirror image thereof so as to provide shunt inductance that matches the impedance of the antenna to the impedance of a device connected thereto at the nominal frequency. An electromagnetic mirror is provided in the form of a ground plane, or in the form of a second combination of radiating element and series loading element so as to provide a dipole antenna.