Variable-Impedance Transmission Line for RF Adaptability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Efficient operation of radio-frequency (RF) circuits is hindered by the difficulty in adapting components to varying platform and environmental characteristics, as existing technologies lack effective methods for adjusting transmission line impedances dynamically.
Innovation Solution
A variable-impedance transmission line system is implemented, utilizing conductors and switches to alter the physical distance between conductors, thereby changing the inductance and capacitance per unit length, and consequently the characteristic impedance of the transmission line, allowing for dynamic impedance adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed-impedance transmission lines are used, then device simplicity is maintained, but adaptability to varying platform and environmental characteristics deteriorates
Solution Approach 1:
The patent applies dynamics by making the transmission line impedance adjustable through movable conductors that can change position. The system transitions from a fixed-impedance state to a dynamic state where conductors can be repositioned to alter the physical distance between them, thereby changing the characteristic impedance to match different platform and environmental characteristics.
Solution Approach 2:
The patent changes physical parameters of the transmission line by altering the physical distance between conductors. By moving conductors to different positions, the inductance and capacitance per unit length are modified, which directly changes the characteristic impedance parameter to adapt to varying operating conditions.
2Adaptability or versatility
If adjustable components are added to adapt RF circuits, then adaptability improves, but device complexity and difficulty of operation increase
Solution Approach 1:
The system enables self-service by allowing automatic or semi-automatic impedance matching through control circuits that adjust conductor positions based on detected platform and environmental characteristics. The transmission line system serves itself by detecting operating conditions and autonomously reconfiguring its impedance without requiring manual intervention.
3Adaptability or versatility
If conductor positions are changed to tune impedance, then adaptability improves, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the transmission line into discrete sections with individually movable conductors. Each conductor can be independently positioned to alter the impedance characteristics, allowing granular control over the transmission line's electrical properties through segmented, modular adjustment.
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 solution enables efficient and adaptable operation of RF circuits by allowing for real-time impedance tuning, improving performance metrics such as return loss and power-added efficiency in wireless communication devices.
Implementation Method 1
changing the inductance and capacitance per unit length, and consequently the characteristic impedance of the transmission line
Data Source
AI summary
Embodiments provide a variable-impedance transmission line. In some embodiments, a variable-impedance transmission line may include one or more conductors that may be isolated or configured as parts of forward or return paths based on states of switches of the variable-impedance transmission line. Other embodiments may be described and claimed.