Motorola Corporation

Daniel D Moline

Robert Paul Davidson

Bernard E Weir, Iii

A technique for achieving impedance transformations utilizing transmission lines has been provided. This technique involves placing additional distributed capacitance along the length of a transmission line thereby reducing the effective characteristic impedance of the transmission line. The effective wavelength for the transmission line is also reduced thereby substantially reducing the electrical length of a quarter wavelength matching network and making the transmission line practical and effective even at low frequencies.

Distributed capacitance transmission line

A low inductance lead frame (10) is formed to have a die attach area (11). A plurality of intermediate connection bars (12,13,14,15) are positioned to be parallel to sides of the die attach area (11), and to be in a plane that is displaced perpendicularly from the die attach area (11). Each end of each intermediate connection bar is separated from an end of each other intermediate connection bar. Supports (17) extend from the die attach area (11) to the intermediate connection bars (12,13,14,15) to provide support for the intermediate connection bars 12,13,14,15). A plurality of leads (19,33,34) are positional in a plane and have a proximal end near the intermediate connection bars (12,13,14,15).

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Chandler, AZ, United States of America

Daniel D Moline