Coupling Device with Electromagnetic Compensation for Signal Integrity
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Solution Overview
Problem
Existing coupling devices exhibit inferior high frequency characteristics due to uneven signal transmitting speeds and inadequate return loss and isolation capacity, which are difficult to improve without altering the line width or thickness of signal lines.
Innovation Solution
A coupling device with electro-magnetic compensation using a parallel-connected capacitor device to the ground, which adjusts return loss and isolation capacity while maintaining consistent signal transmitting speeds by placing capacitors either as open stubs or interconnected through wire/ribbon bonding, allowing for adjustable area configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the line width of signal lines or thickness of medium layer is changed to improve return loss and isolation capacity, then return loss and isolation capacity are improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent introduces a parallel-connected capacitor device as an intermediary component to improve return loss and isolation capacity without modifying the signal lines themselves. The capacitor is connected in parallel to the first signal line and serves as a compensating element that adjusts electromagnetic characteristics, thereby achieving improved performance while maintaining the original signal line dimensions and reducing manufacturing complexity.
Solution Approach 2:
The patent changes the electrical parameters of the coupling device by adding a capacitor with specific capacitance values (e.g., 0.1pF to 10pF) to adjust the electromagnetic characteristics. This parameter change approach allows optimization of return loss and isolation capacity through electrical component selection rather than physical dimensional changes, simplifying the manufacturing process.
2Reliability
If the signal line dimensions are modified to achieve better high frequency characteristics, then high frequency performance is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The capacitor device acts as a mediator that compensates for high frequency performance issues without requiring precise control of signal line dimensions. By introducing this external component, the patent decouples the high frequency performance from the manufacturing precision of the signal lines, allowing standard manufacturing processes to be used while achieving superior high frequency characteristics.
3Ease of manufacture
If the coupling device structure is simplified to reduce manufacturing cost, then manufacturing cost is reduced, but the isolation capacity and return loss performance deteriorate
Solution Approach 1:
The patent uses a capacitor as an inexpensive intermediary component that can be easily manufactured and integrated into the coupling device. This capacitor provides the necessary electromagnetic compensation to achieve good isolation capacity and return loss performance without requiring complex structural modifications, thereby maintaining low manufacturing costs while improving performance.
4Reliability
If the signal transmitting speeds in upper and lower layer signal lines are made consistent to improve high frequency characteristics, then high frequency characteristic is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the speed matching function from the signal line configuration itself and relocates it to the capacitor device. By taking out the electromagnetic compensation function from the signal lines and placing it in the parallel-connected capacitor, the patent achieves consistent signal transmitting speeds without modifying the signal line structures, thereby avoiding increased device 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
The solution enhances return loss and isolation capacity, ensuring the coupling effect and output reach desired levels, achieving better high frequency characteristics and consistent signal speeds between signal lines.
Implementation Method 1
one side of the first signal line lies a capacitor device parallel connected to a ground
Implementation Method 2
the second signal line is coupled with the first signal line by a plurality of electrical-conductive through holes
Data Source
AI summary
A coupling device with electro-magnetic compensation is provided. The coupling device includes a first substrate having a first signal line on a top surface of the first substrate and a second substrate having a second signal line on a top surface of the second substrate connected together with a bottom surface of the first substrate wherein the second signal line couples with the first signal line by a plurality of electrical-conductive through holes. One side of the first signal line lies a capacitor device parallel connected to a ground and the capacitor device plays the role of adjusting the amount of return loss, isolation capacity, and coupling effect so as to have transmitting speeds in first and second signal lines remain substantially the same and superior high frequency characteristics.