Millimeter-Wave Waveguide Shielding for Crosstalk Reduction
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Solution Overview
Problem
Conventional millimeter-wave communication systems face issues such as millimeter-wave leakage, signal reflection, low refractive index leading to increased channel size, and high power consumption, which limit data bandwidth and throughput, especially in high-performance computer systems.
Innovation Solution
A millimeter-wave waveguide communication system with a metal conductive wall for electromagnetic shielding, high refractive index materials like silicon for waveguides, and a global optical clock for low phase noise, combined with reflection-suppressed structures to minimize signal reflections and increase integration density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If plastic waveguide is used for millimeter-wave transmission, then millimeter-wave can be confined within the waveguide, but millimeter-wave leakage occurs on the outer surface causing electric field coupling between adjacent waveguides
Solution Approach 1:
A metal conductive wall is introduced as an intermediary shielding layer between adjacent plastic waveguides. This conductive wall acts as a barrier that intercepts and redirects leaked millimeter-waves, preventing electric field coupling between neighboring waveguides while allowing the waveguides to be positioned closer together.
Solution Approach 2:
The system uses a composite structure combining plastic waveguide material with metal conductive wall shielding. The plastic waveguide provides dielectric confinement for millimeter-wave propagation, while the metal conductive wall provides electromagnetic shielding, creating a hybrid structure that leverages the advantages of both materials.
2Object-affected harmful factors
If plastic waveguide with low refractive index is used, then millimeter-wave transmission is achieved, but characteristic size of signal channel increases reducing integration density
Solution Approach 1:
The refractive index parameter of the waveguide material is changed from low (plastic) to high (silicon or ceramic). This parameter change reduces the characteristic size of the signal channel and allows for higher integration density, as the guided wavelength is inversely proportional to the refractive index.
Solution Approach 2:
The waveguide structure transitions from uniform plastic material to a localized high-refractive-index region (silicon or ceramic core) surrounded by metal shielding. This local quality enhancement concentrates the electromagnetic field more tightly within the waveguide, reducing the effective channel size.
3Ease of operation
If circuit modules (mixer and voltage-controller oscillator) are used for generating millimeter-wave carrier, then signal generation is achieved, but power consumption and phase noise increase leading to higher bit error rate
Solution Approach 1:
The mechanical/electrical circuit-based signal generation system (mixer and voltage-controller oscillator) is replaced with an optical-based system (optical frequency comb). This substitution eliminates the need for high-power RF circuits, significantly reducing power consumption and phase noise while maintaining signal generation capability.
Solution Approach 2:
An optical frequency comb serves as an intermediary between the optical domain and the millimeter-wave RF domain. The optical comb provides a stable, low-noise reference that is converted to millimeter-wave signals, acting as a clean intermediary that avoids the noise and power issues of direct RF generation.
4Productivity
If copper transmission line is used for data transmission, then data transmission is achieved, but skin effect and self-induction effect become significant at high signal rates limiting transmission distance
Solution Approach 1:
The electrical copper transmission line system is replaced with an optical waveguide system. This substitution transitions the transmission medium from electrical conductors subject to skin effect and self-induction to dielectric waveguides that support optical or millimeter-wave propagation with significantly reduced losses at high frequencies.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution minimizes crosstalk, improves signal quality, reduces bit error rates, and achieves high data transmission rates, supporting high-density and high-speed interconnections suitable for high-performance systems.
Implementation Method 1
A top face, a side face and/or a bottom face of the transmission waveguide, except for active devices and accessories thereof, are plated with a metal conductive wall to form an electromagnetic shield from a transmission waveguide in an adjacent millimeter-wave receiving/sending channel.
Implementation Method 2
the plastic waveguide has a low refractive index, which leads to an increased characteristic size of a signal channel, an increased size of the waveguide, and the reduced number of waveguides within a limited range
Data Source
AI summary
The present disclosure provides a millimeter-wave waveguide communication system. The millimeter-wave waveguide communication system may comprise: a clock component, and at least two sets of millimeter-wave receiving/transmitting channels. The clock component is configured to provide a clock signal to sending ends and receiving ends of the two sets of millimeter-wave receiving/sending channels respectively. Each set of millimeter-wave receiving/sending channels comprises: a transmitter component, a receiver component and a transmission waveguide. The transmission waveguide is located between the transmitter component and the receiver component and is configured to provide a channel for millimeter-wave transmission. The top face, side face and/or bottom face of the transmission waveguide, except for active devices and accessories thereof, are plated with a metal conductive wall to form an electromagnetic shield from a transmission waveguide in an adjacent millimeter-wave receiving/sending channel. The metal conductive wall can minimize the crosstalk between the channels during high-speed communications, thereby improving data bandwidth and data throughput of the millimeter-wave communication system.