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:
Jun. 26, 2001
Filed:
Jan. 05, 2000
Suvi Tarvas, Oulu, FI;
Jyrki Mikkola, Oulu, FI;
Sauli Kivelä, Kuusamo, FI;
Anne Isohätälä, Kello, FI;
Filtronic LK Oy, Kempele, FI;
Abstract
A PIFA structure has a first operating frequency and a second operating frequency. It comprises a planar radiating element (,) which is a conductive area confined by a substantially continuous border line divided by a non-conductive slot (,). The slot has a first end on said substantially continuous border line and a second end within the conductive area. The planar radiating element comprises a feedpoint (,) and ground contact (,) near the first end of the slot so that the electrical length of the conductive area divided by the slot, measured at the feedpoint, equals a quarter of the wavelength at the first operating frequency and the electrical length of the slot equals a quarter of the wavelength at the second operating frequency.