Integrated Power Divider with Slot Filter for Harmonic Suppression
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Solution Overview
Problem
Traditional Wilkinson power dividers are large and lack harmonic suppression, necessitating additional filters that increase cost and size, making them unsuitable for miniaturized power distributing devices with harmonic suppression capabilities.
Innovation Solution
A multilayer power distributing device with a microstrip line power divider, integrated matching capacitors, isolation resistors, and a slot filter structure that suppresses harmonics while maintaining compact size and low cost, utilizing a substrate with specific dielectric layers and metal via-holes for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If traditional Wilkinson power divider is used, then power distribution function is achieved, but device area is large
Solution Approach 1:
The patent combines the power divider function and harmonic suppression function into a single integrated device. The Wilkinson power divider structure is merged with a band-stop filter structure, where the filter's stopband frequency is designed to coincide with the operating frequency of the power divider. This integration eliminates the need for separate harmonic suppression filters, thereby reducing device area while maintaining both power distribution and harmonic suppression capabilities.
Solution Approach 2:
The patent creates a multi-functional device that simultaneously performs power distribution and harmonic suppression. The combined structure serves dual purposes: the Wilkinson power divider portion distributes power to multiple outputs, while the integrated band-stop filter portion suppresses harmonics at the operating frequency. This multi-functionality resolves the contradiction by eliminating the need for separate dedicated harmonic suppression components.
2Reliability
If filter is added to suppress harmonics, then harmonic suppression function is achieved, but device cost increases
Solution Approach 1:
The patent merges the harmonic suppression filter with the power divider structure, creating a single integrated component. The band-stop filter is designed with resonant elements that are electrically connected to the power divider's transmission lines. This integration means that one manufacturing process produces both the power distribution function and the harmonic suppression function, eliminating the need for separate filter components and reducing overall device cost.
Solution Approach 2:
The patent creates a universal structure that performs both power distribution and harmonic suppression within a single device. The combined design allows the same physical structure to fulfill multiple functions, thereby reducing the total component count and manufacturing complexity. This multi-functionality directly addresses the cost issue by eliminating the need for additional dedicated harmonic suppression filters.
3Reliability
If filter is added to suppress harmonics, then harmonic suppression function is achieved, but device area increases
Solution Approach 1:
The patent combines the filter structure with the power divider structure in a compact integrated design. The band-stop filter's resonant elements are positioned and connected such that they share physical space with the power divider's transmission lines and resistors. This merging of structures eliminates the need for separate filter components that would occupy additional area, thereby achieving harmonic suppression without increasing device area.
Solution Approach 2:
The patent employs a nested structure where the filter elements are embedded within or alongside the power divider structure. The band-stop filter's resonant circuits are integrated into the signal path of the power divider, with shared components and overlapping physical footprints. This nesting approach allows both functions to coexist in a compact arrangement, minimizing the overall device area while maintaining both power distribution and harmonic suppression capabilities.
Data Source
AI summary
A miniaturized power distributing device with harmonic suppression function and low cost is set in a substrate, and includes first, second, and third metal levels. The first metal level includes a power divider to divide one signal into multiple output signals, or to combine multiple input signals into one output signal. The second metal level includes a filter structure to filter out harmonics. The third metal level is isolated against electromagnetic wave signal leaking from the second metal level. The second metal level is set between the first and third metal levels, dielectric layers are set between the first and second metal levels and between the second and third metal levels.