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. 22, 2005
Filed:
Apr. 04, 2003
Seppo Ojantakanen, Suzhou, FI;
Timo Leppäluoto, Oulu, FI;
Seppo Ojantakanen, Suzhou, FI;
Timo Leppäluoto, Oulu, FI;
Filtronic LK Oy, Kempele, FI;
Abstract
An antenna of a radio apparatus, the directional pattern of which can be altered controllably. The antenna comprises at least one conductive element, additional from the viewpoint of the basic operation of the antenna, for shaping the directional pattern of the antenna. Such a conductive element () is connected to signal ground at a ground point relatively near the feed point (F) of the antenna. The conductive element has a part () the length of which is about a quarter of the wavelength at an operating frequency of the antenna, pointing from the ground point (G) in a direction substantially opposite to the feeding direction of the radiating element (). That part is used to equalize the directional pattern of the antenna in the receiving band. In addition, the conductive element has a second part () pointing from the ground point to the feeding direction of the radiating element to set a directional pattern notch at transmitting band frequencies in a desired direction.