Metallic Blocking Structures for Signal Isolation
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Solution Overview
Problem
Conventional connector and backplane architectures in electronic systems introduce impedance discontinuities, leading to signal degradation and cross-talk between printed circuit boards (PCBs), requiring expensive solutions and precise alignment, and are susceptible to mechanical wear and jostling.
Innovation Solution
The use of metallic and absorber signal isolation structures around integrated circuit packages on PCBs to reduce signal leakage and cross-talk, allowing for closer spacing and improved signal integrity without mechanical connectors, using asymmetrical and symmetrical horn-shaped metallic structures and absorptive materials to guide and absorb electromagnetic signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional connector and backplane architectures are used to connect PCBs, then information flow between PCBs is facilitated, but impedance discontinuities are introduced causing signal degradation and cross-talk
Solution Approach 1:
The patent replaces mechanical connectors with electromagnetic field-based contactless communication. Transmitters and receivers use electromagnetic coupling to transfer signals between PCBs, eliminating physical contact points that cause impedance discontinuities. This substitution of mechanical connection with electromagnetic field interaction resolves the signal degradation issue while maintaining information flow capability.
Solution Approach 2:
The patent introduces metallic blocking structures as intermediary elements to contain electromagnetic fields within designated communication channels. These structures act as mediators that guide electromagnetic energy between transmitters and receivers while preventing field leakage into adjacent channels, thereby reducing cross-talk without affecting the primary communication function.
2Ease of operation
If conventional mechanical connectors are used to connect PCBs, then signal transmission between PCBs is enabled, but the connectors wear out over time and require precise alignment
Solution Approach 1:
The patent eliminates mechanical connectors entirely by using contactless electromagnetic communication. Transmitters and receivers communicate through electromagnetic field coupling, removing moving parts that wear out and rigid alignment requirements. This increases reliability by replacing a mechanical system prone to degradation with a field-based system that has no contact wear or alignment drift issues.
3Object-affected harmful factors
If metallic blocking structures are used to reduce signal leakage, then cross-talk between communication channels is minimized, but the device complexity increases
Solution Approach 1:
The patent employs thin metallic blocking structures that act as electromagnetic shields to contain fields within communication channels. These thin film-like structures provide effective cross-talk reduction while adding minimal complexity compared to bulky traditional shielding approaches. The thin profile allows easy integration into the PCB layout without significantly increasing device complexity.
4Object-affected harmful factors
If absorber structures are used to reduce signal leakage, then cross-talk between communication channels is minimized, but the device complexity increases
Solution Approach 1:
The patent uses absorber materials with lossy electromagnetic properties to contain fields within communication channels. These materials, which may have porous or composite structures, absorb stray electromagnetic energy and prevent it from coupling into adjacent channels. The use of specialized absorber materials provides effective cross-talk reduction while managing the added complexity through material selection rather than structural complexity.
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 effectively minimizes cross-talk between communication channels, preserves frequency spectrum, and enables faster data transfer while being cost-effective, simple to integrate, and reducing the overall package footprint.
Implementation Method 1
one or more metallic blocking structures configured to reduce signal leakage from the corresponding integrated circuit package
Implementation Method 2
one or more absorber structures configured to reduce signal leakage from the corresponding integrated circuit package
Data Source
AI summary
Methods, systems, and apparatus for EM isolation structures. One of the apparatus includes a communication module, the communication module including: a printed circuit board; a plurality of integrated circuit packages, each integrated circuit package including at least one transmitter, receiver, or transceiver; and one or more metallic blocking structures configured to at least partially encircle a corresponding one of the plurality of integrated circuit packages, wherein each metallic blocking structure is configured to reduce signal leakage from the corresponding integrated circuit package.