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Method for a magnetic vector interconnect

IP.com Disclosure Number: IPCOM000132450D
Publication Date: 2005-Dec-16
Document File: 3 page(s) / 22K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for a magnetic vector interconnect. Benefits include improved functionality and improved performance.

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Method for a magnetic vector interconnect

Disclosed is a method for a magnetic vector interconnect. Benefits include improved functionality and improved performance.

Background

              A transverse electric (TE) mode occurs when an electric field is perpendicular to the direction of the traveling wave and the magnetic field is in the direction of the traveling wave.

General description

              The disclosed method communicates information between multiple devices. The method uses the angle of the magnetic field of a traveling wave to encode bit information. Each different angle represents a different eigenmode of the waveguide, enabling multiple bits to be sent and received at the same time using the principles of super-position.

Advantages

              The disclosed method provides advantages, including:
•             Improved functionality due to providing an interconnect comprised of a single trace that supports TE modes of wave propagation

•             Improved functionality due to supporting multiple bits on a single trace

•             Improved performance due to eliminating unwanted signal dispersion effects by driving the trace in the first eigenmode

•             Improved performance due to reducing the effects of inter-symbol interference

Detailed description

              The disclosed method includes an interconnect comprised of a single trace that supports TE modes of wave propagation. For a single conductor above a ground plane, the total TE mode has a lower cutoff frequency that is set by the following equation:

f = v / (2 x)

              The equation includes the following values:

•             f - cutoff frequency

•             v - speed of the wave

•             x - wavelength

              The cutoff frequency is the first eigenmode of the wave guide. For example, a microstrip has a speed of 1.5e10 cm/second and a trace width of 2 cm. The cutoff frequency is 3.75 GHz in full TE mode.

              As the direction of the magnetic field is rotated, the mode approaches the transverse electro-magnetic (TEM) mode. The electric and magnetic fields are perpendicular to the direction of the traveling wave. Any angle of the magnetic field from 0 to pi/2 between TE and TEM modes is supported by the wave guide.

              Another implementation can drive the magnetic field angle from –pi/2 to +pi/2, increasing the bit density.

              To stimulate the mode in the waveguide, the signal is driven. The trace is located over a ground plane (shaded area). The current source, CS, supplies the appropriate current. The individual sources, designated as 1,2,3,4, sink the current. This configuration creates the transverse electric field and the magnetic field in a direction perpendicular to the lines connecting the current source and the curren...