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:
Nov. 16, 1999
Filed:
Jun. 30, 1998
Richard Matthew Dougherty, Scottsdale, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A distributed MMIC active quadrature hybrid (10) provides in-phase (I) and quadrature-phase (Q) outputs (22, 24) over an octave bandwidth. The quadrature hybrid includes in-phase and quadrature-phase amplifying elements (14, 12) arranged in a distributed manner. The in-phase amplifying elements (14) include FETs (42) with series inductive feedback (44) in the source path. The quadrature-phase amplifying elements (12) includes FETs (52) with series capacitive feedback (54) in the source path. The series inductive and capacitive feedback provides the phase difference between the hybrid's outputs. The FETs of the in-phase and quadrature-phase amplifying elements have differing gate peripheries to provide amplitude tracking over the bandwidth.