Baseband and RF Dispersion Compensation for Dielectric Waveguides

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Solution Overview

Problem

Dielectric waveguides operating in the millimeter-wave frequency range experience chromatic dispersion, leading to inter-symbol interference due to varying group delay responses, which complicates signal transmission over medium ranges of 1 to 5 meters.

Innovation Solution

A system with a transmitter and receiver that performs dispersion compensation in both the baseband and RF domains, using baseband dispersion compensation circuitry for fine compensation and RF dispersion compensation circuitry for coarse compensation, to mitigate chromatic dispersion effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If radio waves are transmitted through a dielectric waveguide over medium range, then data transmission capability is improved, but chromatic dispersion causes inter-symbol interference

Engineering Contradiction:

Improvedata transmission capabilityVSAvoidsignal integrity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The dispersion compensation is segmented into two distinct domains: RF domain compensation handling coarse dispersion effects, and baseband domain compensation handling fine dispersion effects. This segmentation allows each compensation stage to address specific aspects of chromatic dispersion without interfering with the other, thereby maintaining signal integrity while enabling medium-range transmission

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Dispersion compensation is performed in advance before signal degradation becomes severe. The RF dispersion compensator applies preliminary compensation for coarse dispersion effects, and the baseband dispersion compensator applies additional preliminary compensation for fine effects, preventing inter-symbol interference before it occurs during transmission

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If single mode waveguide operates over broad frequency range, then bandwidth utilization is improved, but group delay variation increases

Engineering Contradiction:

Improvebandwidth utilizationVSAvoidgroup delay response complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Dispersion compensators act as intermediary elements between the waveguide and the signal processing system. These compensators introduce opposite dispersion characteristics that counterbalance the waveguide's chromatic dispersion, effectively mediating the group delay variations and enabling broad frequency range operation with controlled signal integrity

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system changes the dispersion parameters by introducing compensating elements with opposite dispersion characteristics. The RF and baseband dispersion compensators modify the overall group delay response by adding frequency-dependent phase shifts that counteract the waveguide's natural dispersion, thereby maintaining signal integrity across broad frequency ranges

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10404499B2Dispersion compensation for waveguide communication channels

Publication Date: 2019.09.03 INTEL CORP

AI summary

Embodiments of the present disclosure may relate to a transmitter that includes a baseband dispersion compensator to perform baseband dispersion compensation on an input signal. Embodiments may also include a receiver that includes a radio frequency (RF) dispersion compensator to perform RF dispersion compensation. Embodiments may also include a dielectric waveguide coupled with the transmitter and the receiver, the dielectric waveguide to convey the RF signal from the transmitter to the receiver. Other embodiments may be described and/or claimed.