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:
Jan. 21, 2003
Filed:
Apr. 19, 2001
Kazem F Sabet, Ann Arbor, MI (US);
Kamal Sarabandi, Ann Arbor, MI (US);
Linda P. B. Katehi, Northville, MI (US);
Tayfun Ozdemir, Ann Arbor, MI (US);
EMAG Technologies, Inc., Ann Arbor, MI (US);
Abstract
An integrated planar antenna including a metalized ground plane printed on a dielectric slab. One or more slot antenna elements are etched into the metalized layer, and resonate at a particular resonant frequency band. A plurality of voids extend through the slab and act to vary the dielectric constant of the slab so that resonant waves are suppressed in the slab, thus reducing power loss in the antenna. The voids can be selectively localized in the slab to provide various functions, such as impedance matching and reduction of antenna element coupling. The voids can take on any shape and configuration in accordance with a particular antenna design scheme so as to optimize the effective dielectric constant for a particular application. In one particular design, the voids are formed in a random manner completely through slab, and the voids have an opening diameter less than {fraction (1/20)}th of the operational wavelength of the antenna. The voids are formed by a suitable mechanical or laser drilling operation.