Differential Coupler Layout for Misalignment-Tolerant Signal Transfer
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Solution Overview
Problem
Existing wireless communication systems, particularly in CT apparatuses and similar setups, face communication quality degradation and errors due to lateral deviations between rotating and fixed portions, as the conventional differential couplers and transmission lines are symmetrically opposed, leading to changes in differential signal reception.
Innovation Solution
A wireless communication system with a first coupler and a second coupler having electrodes, where the distance between the centroids of the electrodes differs, allowing for electromagnetic coupling to maintain communication quality even with lateral deviations, using a configuration where the sum of differential signal line widths and distances on the coupler is smaller than on the transmission line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the differential coupler and transmission line are symmetrically opposed with the same size, then the structure is simple and easy to manufacture, but lateral deviations cause significant changes in differential signals and degrade communication quality
Solution Approach 1:
The patent applies asymmetry by making the differential coupler smaller than the differential transmission line. Specifically, the coupler's electrode pair has a smaller spacing and/or smaller electrode width compared to the transmission line's electrode pair. This asymmetric configuration creates a transformation ratio that compensates for lateral deviations, maintaining signal integrity even when the rotating portion shifts position relative to the fixed portion.
2Reliability
If the rotating portion deviates in the rotational axis direction, then lateral deviation occurs between signal conductors, but the patent solution maintains communication quality through asymmetric electrode configuration
Solution Approach 1:
The patent changes the physical parameters of the electrodes by creating an asymmetric size relationship between the transmission line electrodes and coupler electrodes. The coupler electrodes are deliberately made smaller with different spacing, creating a transformation ratio. This parameter change allows the system to tolerate positional misalignments while maintaining signal stability, as the asymmetric configuration compensates for lateral deviations through electromagnetic field transformation.
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 configuration suppresses changes in received differential signals and maintains communication quality by reducing the impact of lateral deviations, enhancing the system's resistance to noise and enabling rapid transmission.
Implementation Method 1
a reception circuit configured to receive a differential signal output from the second coupler based on electromagnetic coupling between the first coupler and the second coupler
Data Source
AI summary
A wireless communication system includes a first coupler having a first pair of electrodes and second coupler having a second pair of electrodes that at least partially oppose the first pair of electrodes. A transmission circuit applies a differential signal to the first coupler. A reception circuit receives a differential signal output from the second coupler based on electromagnetic coupling between the first coupler and the second coupler. A distance between centroids of the first pair of electrodes differs from a distance between centroids of the second pair of electrodes.