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:
Jul. 07, 1998
Filed:
May. 26, 1995
Lawrence James Schumacher, Chandler, AZ (US);
Michael L Fraser, Tempe, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A series capacitance is included in both surface ground conductors of coplanar waveguide on an MMIC die. The capacitance compensates for the inductance of bond wires used for transitioning from microstrip line to coplanar waveguide. The capacitance is chosen to resonate with the inductance of the bond wires at the desired frequency. As a result, virtually all microstrip mode ground signal currents are transitioned from the ground plane of the microstrip line to the surface ground conductors of the coplanar waveguide. Microstrip modes affecting the coplanar waveguide are significantly reduced improving isolation between ports of the MMIC die.