Noise Filter Array With Inductance Adjustment Conductors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional noise filter arrays for mobile phones using multiple communication bands face difficulties in effectively suppressing noise across different frequency bands due to the inability to individually adjust the inductances of LC series resonant circuits, leading to inadequate noise suppression in multiple communication bands.
Innovation Solution
A noise filter array with inductance adjustment conductors connected to the signal-side electrodes of ground capacitors in each LC series resonant circuit, allowing for individual adjustment of inductances based on signal frequency, and featuring a layered configuration to reduce magnetic effects and simplify the structure, enabling effective noise suppression across multiple communication bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only one coil L0 is commonly used in the LC series resonant circuits to simplify the configuration, then the device complexity is reduced, but the inductances cannot be individually adjusted for each communication band
Solution Approach 1:
The patent divides the single common coil into multiple separate coils, each dedicated to a specific LC series resonant circuit. This segmentation allows each coil's inductance to be independently adjusted to match the specific frequency requirements of different communication bands, resolving the contradiction between simplified configuration and individual inductance adjustment capability.
Solution Approach 2:
The patent applies local quality by making each coil's inductance value specific to its corresponding filter element's frequency requirements. Instead of a uniform common coil, each local position (coil) has customized inductance characteristics tailored to the specific communication band it serves, enabling precise noise suppression across multiple bands.
2Reliability
If multiple double-resonance filter elements are provided to suppress noises in multiple communication bands, then the noise suppression effectiveness is improved, but the device complexity increases due to the array configuration
Solution Approach 1:
The patent merges multiple filter elements into a single integrated filter array structure where adjacent filter elements share common elements (coils and capacitors). This combining approach maintains the noise suppression effectiveness of multiple filter elements while reducing overall device complexity through resource sharing and compact integration.
Solution Approach 2:
The patent implements universality by designing the filter array such that certain coils and capacitors serve multiple functions - they are shared by adjacent filter elements. For example, a coil may serve as part of both the parallel resonant circuit and series resonant circuit for different filter elements, reducing the total component count while maintaining multi-band noise suppression capability.
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 allows for precise adjustment of inductances in each filter element, effectively suppressing noise within each communication band, even when a mobile phone uses multiple bands, while maintaining a simple configuration and reducing variations in insertion loss characteristics.
Implementation Method 1
an LC parallel resonant circuit and an LC series resonant circuit each including a coil and a capacitor
Implementation Method 2
an LC parallel resonant circuit and an LC series resonant circuit each including a coil and a capacitor
Implementation Method 3
an inductance adjustment conductor that is connected to the signal-side electrode of a ground capacitor of each LC series resonant circuit
Data Source
AI summary
A noise filter array includes filter elements including an LC parallel resonant circuit and an LC series resonant circuit each of which includes a coil and a capacitor provided in proximity in an array and integrally provided with one another. The LC series resonant circuits include ground capacitors having signal-side electrodes. Inductance adjustment conductors are connected to signal-side electrodes of the capacitors defining the respective filter elements, and a ground electrode of the capacitors is commonly arranged so as to oppose the signal-side electrodes.