Combiner Signal Isolation via Side-Surface Capacitor
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Solution Overview
Problem
Current combiners have low signal isolation due to a small capacitor structure, which limits their ability to filter out mixed frequencies effectively without increasing the device's size.
Innovation Solution
The combiner design includes a conductive housing, PCB, and a first conductor with a larger side surface area, forming a capacitor structure that increases capacitance intensity, allowing better filtering of signals without altering the combiner's size by using a tubular or sheet structure for the first conductor, and additional conductors to enhance signal guidance and filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the capacitor structure size is increased to improve signal isolation, then the isolation performance is improved, but the combiner size increases
Solution Approach 1:
The patent transitions from a traditional end-surface capacitor structure to a side-surface capacitor structure. The first conductor is positioned such that its side surface faces the second conductor's end surface, utilizing the lateral dimension of the housing rather than just the end surface area. This dimensional shift allows for larger capacitance intensity without proportionally increasing the overall combiner volume.
Solution Approach 2:
The first conductor is designed with a tubular structure that can be nested within or around the signal transmission path. The tubular first conductor allows the capacitor structure to be integrated into the existing signal flow path, maximizing the use of available space within the combiner housing without requiring additional external volume.
2Reliability
If the capacitor structure size is increased to improve signal isolation, then the filtering capability is improved, but the device complexity increases
Solution Approach 1:
The first conductor serves dual functions: it acts as both a signal transmission conductor and part of the capacitor structure. By making the first conductor tubular or sheet-like with extended side surface area, it simultaneously provides signal guidance and forms the capacitor with the second conductor, eliminating the need for separate capacitor components and reducing overall device complexity.
Solution Approach 2:
The extended side surface of the first conductor provides multiple functions: signal transmission, signal guidance, and capacitor formation. This multi-functional design allows a single structural element to address multiple requirements (isolation, signal routing, and capacitance), thereby improving filtering capability without proportionally increasing device complexity.
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 design enhances signal isolation without increasing the combiner's size, effectively filtering out mixed frequencies and improving the overall performance of the antenna apparatus.
Implementation Method 1
a partial region of the first conductor and a partial region of the second conductor form a capacitor structure
Data Source
Figure 1
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AI summary
The utility model provides a combiner, and belongs to the communications field. The combiner includes a conductive housing (1), a printed circuit board PCB (2), a conductive column (3), and a first conductor (4). The PCB (2), the conductive column (3), and the first conductor (4) are located inside the conductive housing (1); one end of the conductive column (3) is fastened to a bottom part of the conductive housing (1), the PCB (2) is fastened to a top part of the conductive housing (1), and the first conductor (4) is fastened to the PCB (2); and an axial direction of the first conductor (4) is parallel to an axial direction of the conductive column (3), and a partial region of a side surface of the first conductor (4) is opposite to the conductive column (3). The utility model can increase isolation of the combiner without changing a size of the combiner.