Browse Prior Art Database

Wiring Technique for Microstrip Circuits

IP.com Disclosure Number: IPCOM000034835D
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 60K

Publishing Venue

IBM

Related People

Albu, SM: AUTHOR

Abstract

The field of this invention is a method of routing the signal conductors over individual ground return "miniplanes", a method that leads to the elimination of the common ground return plane as a distinct component in certain printed circuits applications. The essential elements of this invention are: signal traces routed in a multilayered printed circuit directly over ground traces and individual ground return traces wide enough with respect to the signal traces to minimize electromagnetic field fringing effects. (Image Omitted) Applications for formed high frequency circuits employ the planar signal transmission system. The basic two models of this system are the "strip line" and "microstrip".

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 53% of the total text.

Page 1 of 2

Wiring Technique for Microstrip Circuits

The field of this invention is a method of routing the signal conductors over individual ground return "miniplanes", a method that leads to the elimination of the common ground return plane as a distinct component in certain printed circuits applications. The essential elements of this invention are: signal traces routed in a multilayered printed circuit directly over ground traces and individual ground return traces wide enough with respect to the signal traces to minimize electromagnetic field fringing effects.

(Image Omitted)

Applications for formed high frequency circuits employ the planar signal transmission system. The basic two models of this system are the "strip line" and "microstrip". Mechanically, the microstrip model is a flat signal conductor over a ground return plane, with a dielectric material separating the two. The dimensional relationship between the signal conductor and the ground return plane, and the physical properties of the dielectric material determine the performance of the circuit. In practice the ground return plane is an undivided, thus the signals share a common ground return. The ground plane, as such represents a separate and distinct component in printed circuits. This invention discloses a two-layer controlled impedance printed circuit with signal traces and ground return planes on both sides. A typical application for printed circuits is in interconnection systems. The function of the printed circuit is mainly to translate cable conductor's spacing to that of the connector. Fig. 1 illustrates a connector pattern with the ground return con...