Circuit Module Splitter Ground Electrode Via Conductors Signal Leakage
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Solution Overview
Problem
The challenge is to enhance the isolation characteristics between transmission and reception electrodes in circuit modules, particularly in compact designs where signal leakage can interfere with reception signals due to the proximity of electrodes and the limited size of the splitter, which hinders further size reduction of mobile communication devices.
Innovation Solution
The solution involves a circuit module configuration with a splitter that includes a transmission filter and a reception filter, where a ground electrode with via conductors along its edge portions is strategically placed between the transmission and reception electrodes, effectively directing any leaked transmission signal into the via conductors and preventing it from reaching the reception electrode, thereby improving isolation. This configuration can be optimized by extending the ground electrode's coverage and connecting it across multiple layers, ensuring efficient signal containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the splitter size is reduced to miniaturize mobile communication devices, then the device size is reduced, but the isolation between transmission and reception electrodes deteriorates due to increased signal leakage
Solution Approach 1:
A ground electrode is introduced as an intermediary element positioned between the transmission electrode and reception electrode. This ground electrode acts as a mediator to intercept and redirect leaked transmission signals into via conductors, preventing them from reaching the reception electrode and thus maintaining isolation characteristics even in compact splitter designs
Solution Approach 2:
The harmful leaked signal is extracted from its potential path to the reception electrode by redirecting it into the via conductors connected to the ground electrode. This extraction removes the interfering signal from the system before it can affect reception, allowing for reduced splitter size without compromising performance
2Area of stationary object
If the transmission electrode and reception electrode are placed close to each other to reduce circuit module size, then the module size is reduced, but electromagnetic interference between the electrodes increases
Solution Approach 1:
The ground electrode serves as a protective intermediary positioned between the transmission and reception electrodes. It intercepts electromagnetic fields and leaked signals from the transmission electrode, guiding them into the via conductors before they can interfere with the reception electrode, thereby enabling close placement without significant interference
Solution Approach 2:
The leaked electromagnetic signal, which would normally be harmful, is converted into a beneficial configuration by directing it into the via conductors. This redirection transforms the harmful leakage into a controlled path that exits through the via conductors, preventing interference while allowing compact electrode spacing
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 significantly enhances the isolation between transmission and reception electrodes, allowing for a more compact design while maintaining effective signal separation, thus supporting the miniaturization of mobile communication devices without compromising performance.
Implementation Method 1
A plurality of via conductors 25 connected to the ground electrode 24 are arranged along an edge portion of the ground electrode 24, which is close to the transmission electrode 21 when viewed in plan
Data Source
AI summary
In a circuit module, even if a transmission signal output from a transmission electrode of a mounting substrate to a transmission terminal of a splitter leaks into a ground electrode, the transmission signal that has leaked into the ground electrode flows into via conductors that are connected along an edge portion of the ground electrode close to the transmission electrode and connected to a ground line of a motherboard. Therefore, the transmission signal that has been output from the transmission electrode and leaked into the ground electrode is prevented from traveling along an edge portion of the ground electrode toward a reception electrode side. Thus, characteristics of isolation between the transmission electrode and the reception electrode provided on the mounting substrate on which the splitter is mounted are improved.