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:
Jan. 27, 2004
Filed:
Aug. 08, 2002
Applicant:
Inventor:
Jose G. Padilla, South Gate, CA (US);
Assignee:
Northrop Grumman Corporation, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01P 5/10 ; H03H 5/00 ;
U.S. Cl.
CPC ...
H01P 5/10 ; H03H 5/00 ;
Abstract
A coupled transmission line balun construction employs two pairs of planar interleaved spiral coils ( & ) formed on an electrically insulating or semi-insulating substrate ( ) defining a planar structure. One coil in each pair is connected in series to define the input transmission line of the balun, with one end ( ) of that transmission line being open circuit. The balun provides an ultra-wide bandwidth characteristic in the frequencies of interest for MMIC devices, is fabricated using the same techniques employed with fabrication of MMIC devices, and is of a physical size that lends itself to application within MMIC devices.