Signal Path Crossovers for Magnetic Coupling Mitigation
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Solution Overview
Problem
Forming satisfactory wireless communications circuitry with multiple signal paths in electronic devices is challenging due to potential undesirable magnetic coupling and excessive space occupancy.
Innovation Solution
Incorporating inductive matching networks with transformers or inductive components and crossovers in signal paths to mitigate magnetic coupling while minimizing spatial separation, thereby enhancing signal propagation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple signal paths are placed close together to minimize space consumption, then space efficiency is improved, but magnetic coupling between signal paths increases causing performance degradation
Solution Approach 1:
The patent introduces crossovers that intentionally create controlled magnetic coupling effects to counteract the unwanted magnetic coupling between parallel signal paths. By placing crossovers at specific locations where signal paths cross, the induced magnetic fields from the crossovers benefitously interfere with and cancel the harmful magnetic coupling between the coextensive parallel paths, thereby converting a potentially harmful electromagnetic interaction into a beneficial cancellation mechanism.
Solution Approach 2:
The crossovers act as intermediary elements between the parallel signal paths. These crossovers are strategically positioned to mediate the magnetic field interactions between the signal paths, introducing controlled magnetic coupling that serves to cancel the unwanted coupling. The crossovers function as intermediate magnetic field sources that modify the overall magnetic environment to reduce net coupling between the parallel paths.
2Object-affected harmful factors
If signal paths are separated to reduce magnetic coupling, then magnetic coupling is reduced, but space consumption increases
Solution Approach 1:
Rather than increasing separation distance, the patent converts the harmful magnetic coupling into a beneficial effect by introducing crossovers. The crossovers generate magnetic fields that constructively interfere to cancel the unwanted coupling, allowing the signal paths to remain closely spaced while achieving reduced net magnetic coupling through active field cancellation rather than passive distancing.
Solution Approach 2:
The patent changes the magnetic field parameters by introducing additional magnetic field sources (crossovers) with specific orientations and positions. By adjusting the location and configuration of these crossovers, the magnetic field distribution is modified to create cancellation zones between the parallel signal paths, effectively changing the magnetic coupling parameter from harmful to beneficial without altering the physical separation distance.
3Object-affected harmful factors
If crossovers are added to mitigate magnetic coupling, then magnetic coupling is reduced, but device complexity increases
Solution Approach 1:
The patent merges the crossover functionality with the existing signal path structure. Rather than adding completely separate mitigation components, the crossovers are integrated into the signal routing architecture, serving dual purposes of signal transmission and magnetic coupling mitigation. This merging approach reduces the overall complexity increase by combining multiple functions into unified structural elements.
Solution Approach 2:
The crossovers serve multiple functions simultaneously: they maintain signal path routing, provide magnetic coupling mitigation through controlled field interaction, and potentially serve as impedance transformation points. This multi-functionality reduces the need for separate dedicated mitigation components, thereby limiting the increase in overall device complexity while achieving the desired magnetic coupling reduction.
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
The solution effectively reduces magnetic coupling between signal paths, maintaining performance and minimizing space consumption within the device.
Implementation Method 1
The first inductive matching network may include transformers or other inductive components that are magnetically coupled to transformers or other inductive components in the second inductive matching network
Implementation Method 2
The crossovers may serve to invert a polarity of the signals on the signal paths. The crossovers may help to mitigate the effects of the magnetic coupling between the first and second signal paths
Data Source
AI summary
An electronic device may be provided with wireless circuitry that includes a transceiver. The transceiver may include a first signal path and a second signal path extending parallel to the first signal path. The first signal path may include a first chain of gain stages and a first inductive matching network. The second signal path may include a second chain of gain stages and a second inductive matching network. The first inductive matching network may be magnetically coupled to the second inductive matching network. The first and/or second signal path may include one or more crossovers that invert a polarity of the signals on the signal paths. The crossovers may help to mitigate the effects of the magnetic coupling between the first and second signal paths while allowing for minimal spatial separation between the signal paths.