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:
Feb. 24, 2009
Filed:
May. 17, 2006
Henry Andersson, Espoo, FI;
Petri Haapanen, Vantaa, FI;
Pentti Karhunen, Vantaa, FI;
Reino Keränen, Espoo, FI;
Jarkko Korte, Espoo, FI;
Timo Lyly, Helsinki, FI;
Olli-pekka Marstio, Pornainen, FI;
Pauli Niska-pudas, Helsinki, FI;
Juha Salmivaara, Kerava, FI;
Elena Saltikoff, Helsinki, FI;
Rainer Sanmark, Helsinki, FI;
Paavo Toppila, Vantaa, FI;
Henry Andersson, Espoo, FI;
Petri Haapanen, Vantaa, FI;
Pentti Karhunen, Vantaa, FI;
Reino Keränen, Espoo, FI;
Jarkko Korte, Espoo, FI;
Timo Lyly, Helsinki, FI;
Olli-Pekka Marstio, Pornainen, FI;
Pauli Niska-Pudas, Helsinki, FI;
Juha Salmivaara, Kerava, FI;
Elena Saltikoff, Helsinki, FI;
Rainer Sanmark, Helsinki, FI;
Paavo Toppila, Vantaa, FI;
Vaisala Oyj, Helsinki, FI;
Abstract
The present invention relates to a method and apparatus for simultaneous transmission of horizontal (H) and vertical (V) channels in a dual polarized weather radar. The goal of the invention is accomplished by placing the receiver, duplexer and polarizer equipment above the azimuth rotary joint but below elevation rotary joints. The elevation rotary joints and other associated signal paths are calibrated by using a low power signal on the radar's operating frequency that is fed into couplers above the elevation rotary joints.