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:
May. 15, 2007
Filed:
Dec. 16, 2003
Juha Salmivaara, Kerava, FI;
Petri Haapanen, Vantaa, FI;
Pentti Karhunen, Vantaa, FI;
Vaisala Oyj, Helsinki, FI;
Abstract
The present invention relates to a method and apparatus for pointing the beams () of a wind profiler comprising a stationary antenna matrix () with several individual antenna elements (). According to the method an input signal is fed to the antenna matrix (), and the phase of the input signal is adjusted for the individual antenna elements () in order to point the beam () of the profiler. In accordance with the invention separate feeder lines for each beam are used for feeding the signals to the antenna elements (), and the phase differences between the individual antenna elements () are controlled with hybrid coupler elements ().