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:
Aug. 31, 2004
Filed:
Jul. 29, 2002
Jeffrey C. Merrill, Manlius, NY (US);
Anaren Microwave, Inc., East Syracuse, NY (US);
Abstract
A circuit for supplying signals to a quadrifilar antenna that has an input port for receiving a first signal, a first transmission line connected at one end to the input port, and a first connection point. The first connection point is connected to another end of the first transmission line. The first connection point provides a path to a first antenna port. A second transmission line is connected at one end to the first connection point. A second connection point is connected to another end of the second transmission line. The second connection point provides a path to a second antenna port. A third transmission line is connected at one end to the second connection point. A third connection point is connected to another end of the third transmission line. The third connection point provides a path to a third antenna port. A fourth transmission line is connected at one end to the third connection point. A fourth connection point is connected to another end of the third transmission line. The fourth connection point provides a path to a fourth antenna port. The circuit provides equal amplitude at each of the antenna ports and further provides phase progression of 0 degrees, 90 degrees, 180 degrees and 270 degrees.