Orthogonal LC Resonator Bandpass Filter Attenuation Control
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Solution Overview
Problem
Existing laminated band pass filters face challenges in achieving desired bandpass characteristics due to changes in attenuation pole frequencies when a capacitor is added, making it difficult to precisely control the frequency response.
Innovation Solution
The electronic component incorporates a multilayer structure with orthogonally arranged LC parallel resonators, additional capacitors, and connecting conductors that magnetically couple adjacent resonators, allowing for precise adjustment of bandpass characteristics by modifying the capacitance value and magnetic coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a capacitor is added to the laminated band pass filter to adjust attenuation pole frequencies, then the frequency of attenuation poles can be adjusted, but the frequencies of all attenuation poles change making it difficult to achieve desired bandpass characteristics
Solution Approach 1:
The patent divides the filter structure into multiple independent LC parallel resonators arranged in a specific configuration. Each resonator can be independently adjusted to control attenuation poles, allowing precise frequency adjustment without affecting all poles simultaneously. The resonators are segmented into different groups with specific coupling relationships that enable independent control of passband and stopband characteristics.
Solution Approach 2:
The patent applies different capacitor values to different LC parallel resonators based on their positions and functions. By assigning specific capacitance values to specific resonators (e.g., different capacitors for resonators at different positions), the patent enables localized adjustment of attenuation pole frequencies while maintaining overall bandpass characteristics.
2Reliability
If multiple LC parallel resonators are arranged in a row and magnetically coupled to achieve bandpass filtering, then bandpass function is achieved, but desired bandpass characteristics with sharp rises and falls are difficult to obtain
Solution Approach 1:
The patent transitions from a one-dimensional linear arrangement to a two-dimensional planar configuration where LC parallel resonators are arranged in rows and columns with specific spacing. This dimensional change enables additional coupling paths and more degrees of freedom in controlling the frequency response, allowing sharper passband edges and better attenuation characteristics.
Solution Approach 2:
The patent employs asymmetric arrangement of LC parallel resonators and asymmetric coupling strengths between adjacent resonators. By creating asymmetric magnetic coupling relationships (different coupling coefficients in different directions or between different pairs of resonators), the patent achieves asymmetric frequency response characteristics with sharp rises and falls at the passband edges.
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 the achievement of desired bandpass characteristics with sharper rises and falls on both ends of the pass band, effectively controlling attenuation poles and frequencies, thereby improving the filter's frequency response.
Implementation Method 1
Resonators of the two or more first LC parallel resonators and the two second LC parallel resonators adjacent in the orthogonal direction magnetically couple with each other to define a band pass filter
Data Source
AI summary
An electronic component includes two or more first parallel resonators arranged in an orthogonal direction orthogonal or substantially orthogonal to a lamination direction, each first LC parallel resonator including a first inductor and a first capacitor, two second LC parallel resonators surrounding the two or more first LC parallel resonators from both sides in the orthogonal direction, each second LC parallel resonator including a second inductor and a second capacitor, a second capacitor connected to one end of the two second LC parallel resonators, and a first connecting conductor that connects two of the first LC parallel resonators that are not adjacent in the orthogonal direction, or connects one of the first LC parallel resonators and one of the second LC parallel resonators that are not adjacent in the orthogonal direction.