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. 16, 2004
Filed:
Apr. 08, 2003
Mohammad Bani Hani, Lindenhurst, IL (US);
Aamir A. Abbasi, Mundelein, IL (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
A variable multi-band planar reference antenna assembly ( ) has a ground plane element, a dual-bandplanar reference antenna structure element ( ), and an electrically-coupled variable secondary radiator element ( ) which allows tuning from one set of frequency bands to another set of frequency bands by changing the field fringing capacitances and inductances formed between the dual-band planar reference antenna element ( ) and the variable secondary radiator element ( ). Tuning can be performed using a variety of techniques, including changing the relative position of the dual-band planar reference antenna structure element with respect to the secondary radiator, changing the geometry of the secondary radiator, and/or coupling passive or active capacitive and inductive elements to the dual-band planar reference antenna structure element ( ) and/or the secondary radiator ( ). This variable multi-band planar antenna assembly is particularly useful in mobile telephone applications, or other wireless communication device applications.