RF Feeding Cable Impedance Compensation for U-Band Signal Coupling
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Solution Overview
Problem
Conventional signal processing devices face challenges in achieving a good feeding effect for radio frequency signals, particularly U-band signals, due to high sensitivity to inductive and capacitive impedance, leading to low power conversion efficiency and structural strength issues.
Innovation Solution
The proposed signal processing device incorporates a feeding apparatus with a first connection member forming a capacitive impedance and a second connection member forming an inductive impedance, both electrically connected to the target apparatus, with the capacitive and inductive impedances partially canceling each other to improve the feeding effect, and a feeding cable with a maximum bending curvature less than a preset threshold to ensure structural strength without additional fasteners or secondary soldering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional feeding structure is used for U-band signals, then the structure is simple, but the feeding effect is poor due to high sensitivity to inductive and capacitive impedance
Solution Approach 1:
The feeding structure is segmented into multiple connection members (first connection member forming capacitive impedance, second connection member forming inductive impedance) that can be independently designed and optimized. This segmentation allows each member to contribute differently to the overall impedance compensation, improving the feeding effect for U-band signals while maintaining manageable complexity through modular design.
Solution Approach 2:
The patent changes the impedance parameters by introducing both capacitive and inductive impedance elements with specific values that compensate for each other. The capacitive impedance from the first connection member and inductive impedance from the second connection member are tuned to achieve optimal impedance matching for U-band frequencies, transforming the feeding structure's electrical characteristics to suit high-frequency signals.
2Strength
If additional fasteners or secondary soldering are used to ensure structural strength, then the structural strength is improved, but the material and process costs increase
Solution Approach 1:
The patent merges the electrical connection function with the mechanical support function into a single integrated feeding cable assembly. The feeding cable's natural bending and routing provide both electrical connectivity and structural support, eliminating the need for separate fasteners or secondary soldering operations. This integration reduces manufacturing steps and material costs while maintaining structural strength.
Solution Approach 2:
The feeding cable structure is designed to be self-supporting, where the cable's own physical configuration and mechanical properties provide the necessary structural strength. The cable naturally resists excessive bending and maintains positioning without requiring additional fasteners, making the system self-sufficient and reducing manufacturing complexity.
3Adaptability or versatility
If the feeding cable is allowed to bend freely for flexible installation, then the installation space flexibility is improved, but the structural strength and signal quality deteriorate
Solution Approach 1:
The patent introduces dynamic control of the feeding cable's bending characteristics by defining a maximum bending curvature threshold. The cable can bend within acceptable limits to accommodate installation flexibility, but the curvature constraint ensures that bending-induced signal degradation and structural damage are prevented. This dynamic balance allows the system to adapt to different installation scenarios while maintaining signal quality.
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 achieves high power conversion efficiency, reduces material and process costs, and enhances structural reliability by minimizing bending stress and eliminating the need for secondary soldering or additional fasteners, while maintaining a flexible installation space.
Implementation Method 1
a first connection member configured to form a capacitive impedance with the target apparatus
Implementation Method 2
a second connection member configured to form an inductive impedance with the target apparatus
Data Source
AI summary
A signal processing device may include a feeding apparatus having a first conductor configured to transmit a radio frequency signal; an insulating medium covering the first conductor; and a second conductor covering the insulating medium. The conductor may have first, second, and third portions. The third portion of the first conductor may be configured to be connected to the target apparatus to feed the radio frequency signal to the target apparatus and configured to form a capacitive impedance with the target apparatus, and the second portion of the first conductor may be configured to form an inductive impedance with the target apparatus. An absolute value of a sum of the capacitive impedance and the inductive impedance may be less than or equal to a preset impedance threshold.