Integrated Band-Pass Filter Layout for Compact High-Frequency Suppression
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Solution Overview
Problem
Traditional filters, such as LC filters, have a low degree of integration, large size, and poor filtering characteristics for high-frequency signals, making them unsuitable for modern communication systems that require miniaturization and high-frequency performance.
Innovation Solution
A filter design incorporating multiple band-pass filter circuits with high Q-value inductors and large capacitors, arranged to achieve low insertion loss, fast attenuation, and high out-of-band suppression, allowing for miniaturization and improved frequency selectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional LC filters are used, then the filter can be implemented with simple structure, but the degree of integration is low and the size is large
Solution Approach 1:
The patent combines multiple band-pass filter circuits into a single integrated filter device, merging multiple filtering functions into one compact unit. This integration approach reduces the overall size while maintaining the necessary filtering capabilities, directly addressing the contradiction between simple structure and small size.
Solution Approach 2:
The filter circuits are designed with nested or cascaded configurations where multiple band-pass filter stages are embedded within each other. This nesting approach allows multiple filtering functions to be packed into a compact volume, achieving high integration density while keeping the overall device small.
2Device complexity
If traditional LC filters are used, then the filter structure is simple, but the filtering characteristics for high-frequency signals are poor
Solution Approach 1:
The filter is divided into multiple band-pass filter circuits, each targeting specific frequency ranges. This segmentation allows each circuit to be optimized for particular high-frequency bands, improving overall high-frequency filtering performance while maintaining a relatively simple overall structure through modular design.
Solution Approach 2:
Different band-pass filter circuits are designed with different characteristics optimized for specific frequency ranges. Each circuit segment has tailored components and topology suited for its designated frequency band, enabling high-frequency signals to be filtered with appropriate local optimizations rather than a one-size-fits-all approach.
3Reliability
If cavity filters are used, then the filtering performance is good, but the size is large and integration is difficult
Solution Approach 1:
The patent replaces traditional mechanical cavity filter structures with integrated circuit-based band-pass filter circuits. This substitution transitions from bulky mechanical resonators to compact electronic components, achieving good filtering performance in a miniaturized form factor suitable for integration into modern electronic devices.
Solution Approach 2:
The filter design moves from three-dimensional cavity structures to planar integrated circuit layouts. By transitioning to two-dimensional circuit board implementations with carefully designed trace geometries and component arrangements, the patent achieves cavity-like filtering performance in a flattened, integrated format that occupies minimal space.
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 filter achieves low insertion loss in the passband, fast attenuation at band edges, and excellent out-of-band suppression, enabling high-frequency filtering with a compact design suitable for advanced communication systems.
Implementation Method 1
the first band-pass filter circuit is connected with the first port and is configured to output a first signal after suppressing a signal with a frequency between a first frequency and a second frequency in an initial signal input from the first port
Data Source
AI summary
Embodiments of the present disclosure provide a filter, an integrated passive device, an electronic device and a display device. The filter includes: a first port, a second port, a first band-pass filter circuit, a second band-pass filter circuit and a third band-pass filter circuit. The first band-pass filter circuit is configured to output a first signal after suppressing a signal with a frequency between a first frequency and a second frequency in an initial signal input from the first port; the second band-pass filter circuit is configured to receive the first signal and output a second signal with a frequency between a third frequency and a fourth frequency in the first signal; the third band-pass filter circuit is configured to receive the second signal and output a third signal with a frequency between a fifth frequency and a sixth frequency in the second signal to the second port.