Variable ISI Channel Apparatus with Sliding Dielectric
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Solution Overview
Problem
Conventional ISI boards struggle to simulate actual transmission channel conditions due to an inability to continuously and variably set ISI amounts, limiting their effectiveness in simulating 'live' ISI in high-speed serial data communication.
Innovation Solution
A variable ISI transmission channel apparatus is designed with a transmission loss generating mechanism that adjusts the facing area between a dielectric, magnetic, or electric conductor and a conductor strip on a dielectric substrate, allowing continuous and variable setting of ISI amounts by sliding the transmission loss generating member, thereby altering the transmission loss and ISI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional ISI boards use fixed conductor strip patterns with constant width, then the structure is simple and easy to manufacture, but the ISI amount cannot be continuously and variably set, limiting simulation accuracy
Solution Approach 1:
The patent introduces a movable dielectric member that can slide along the conductor strip, dynamically changing the facing area between the dielectric and conductor. This dynamic adjustment mechanism enables continuous variable setting of ISI amounts, transforming a static structure into a dynamic one that can adapt to different simulation requirements.
Solution Approach 2:
The patent changes the physical parameter of the dielectric-conductor interface by varying the facing area through sliding movement. This parameter change directly controls the transmission loss and ISI characteristics, allowing precise adjustment of simulation conditions without changing the fundamental structure.
2Adaptability or versatility
If multiple discrete conductor strip patterns are used to simulate different ISI amounts, then the device remains relatively simple, but continuous variable setting is not achieved, preventing live ISI simulation
Solution Approach 1:
The sliding dielectric member creates a dynamic adjustment mechanism where continuous movement along the conductor strip provides continuous variable ISI settings. This eliminates the need for discrete pattern changes and enables smooth, continuous adjustment of transmission loss characteristics.
Solution Approach 2:
The single dielectric member can assume multiple positions along the conductor strip, with each position providing a different ISI amount. This multi-position capability makes the device universal for simulating various transmission channel conditions without requiring multiple separate components or patterns.
3Reliability
If the facing area between dielectric and conductor is increased, then transmission loss and ISI are enhanced for better simulation, but the device complexity and adjustment mechanism become more complicated
Solution Approach 1:
The simple sliding mechanism along the conductor strip provides dynamic control of the facing area. This straightforward mechanical movement achieves reliable ISI enhancement without introducing complex adjustment mechanisms, maintaining ease of operation while improving simulation realism.
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 enables practical simulation of 'live' ISI environments in high-speed serial data communication, allowing for more accurate bit error rate testing and improved communication quality by adjusting ISI amounts over a wide range.
Implementation Method 1
a dielectric (6) facing the conductor strip (2)... generates a dielectric loss under the effect of a high-frequency electric field
Implementation Method 2
a magnetic body (16) facing the conductor strip (2)... generates a magnetic loss under the effect of a high-frequency magnetic field
Implementation Method 3
an electric conductor (26) facing the conductor strip (2)... generates a resistance loss due to an induction of an eddy current
Data Source
AI summary
A variable ISI transmission channel apparatus inserted in a high-speed transmission channel for the high-speed serial data communication simulates a “live” ISI environment to which the high-speed transmission channel in operation is exposed, in a situation such as a bit error test by means of continuously adjusting an amount of inter-symbol interference (ISI) in the high-speed transmission channel.By allowing an undersurface of a transmission loss generating member (6) (16) (26) such as a dielectric, a magnetic body, and an electric conductor to face, and slide on, a top surface of a conductor strip (2) exposed on a top surface of a plate-shaped dielectric substrate (1), a facing area is continuously increased/decreased. A dielectric loss, a magnetic loss, or a resistance loss increased/decreased in the transmission loss generating member is reflected on a high-frequency signal on the conductor strip (2).