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:
Oct. 17, 1989
Filed:
Dec. 05, 1988
Thomas E Roberts, Saratoga, CA (US);
Ford Aerospace Corporation, Newport Beach, CA (US);
Abstract
Apparatus for dividing and combining electromagnetic energy, particularly at microwave frequencies. An input port (4) is positioned generally equidistant from each of n output ports (5,6;31,32,33 . . . ), where n is a finite integer greater than 1. n quarter-wavelength impedance transforming conductors (20;41,42,43 . . . ) couple the input port (4) to the n output ports (5,6;31,32,33 . . . ), respectively. Positioned between each pair of adjacent output ports (5,6;31,32,33) is an isolation resistor (7). A pair of half-wavelength unity impedance transformers (21) couples each isolation resistor (7) to its two associated output ports (5,6;31,32,33 . . . ), respectively. The invention allows greater geometrical freedom than prior art splitters, and offers a lower loss for a given frequency.