Tunable Antenna Matching Network for Wireless Device Impedance
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Solution Overview
Problem
Existing multi-frequency wireless devices face inefficiencies due to compromised antenna performance across various frequency bands and operating environments, such as when used near the head or in pockets, and rely on fixed circuit components that struggle to optimize power transfer across multiple frequency bands and use cases.
Innovation Solution
The implementation of a tunable antenna system with a Passive Tunable Integrated Circuit (PTIC) and a tunable matching network, utilizing electrically tunable capacitors and closed-loop algorithms to adjust the antenna's resonant frequency and impedance match, based on operational parameters like frequency, mechanical configuration, and environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a simple fixed circuit is used to improve power transfer, then power transfer is improved for specific conditions, but performance deteriorates across multiple frequency bands and use cases
Solution Approach 1:
The patent implements a tunable matching network with variable components (switches, capacitors, inductors) that dynamically adjust circuit configuration based on operating conditions. The controller receives input about frequency band and use case, then reconfigures the matching network components to optimize power transfer for each specific condition, transforming a static fixed circuit into a dynamic adaptive system.
Solution Approach 2:
The patent changes electrical parameters (impedance, capacitance, inductance) of the matching network components based on operating conditions. By switching between different component values and configurations, the system optimizes power transfer efficiency for different frequency bands and use cases, directly addressing the contradiction between fixed circuit simplicity and adaptive performance.
2Volume of moving object
If antenna design compromises are made to fit size constraints, then device portability is improved, but antenna radiation efficiency deteriorates across frequency bands
Solution Approach 1:
The patent applies tuning elements (variable capacitors, inductors, switches) to the antenna structure that allow dynamic adjustment of antenna electrical characteristics. This enables a compact antenna design to maintain optimal radiation efficiency across multiple frequency bands by reconfiguring the antenna's impedance and resonant properties, rather than requiring a larger fixed-geometry antenna.
Solution Approach 2:
The patent changes the electrical parameters (capacitance, inductance, impedance) of the antenna and its matching network to optimize radiation efficiency for different frequency bands. This allows a compact antenna to achieve broadband performance through parameter adjustment rather than through increased physical size.
3Device complexity
If fixed value components are used in the matching circuit, then circuit simplicity is improved, but impedance matching performance deteriorates across multiple frequency bands
Solution Approach 1:
The patent replaces fixed components with tunable components (switches, variable capacitors, variable inductors) controlled by a controller that adjusts the matching network configuration based on frequency band and use case. This dynamic reconfiguration capability maintains reliable impedance matching across multiple frequency bands while managing circuit complexity through systematic control.
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 approach enhances antenna efficiency by maintaining a stable Voltage Standing Wave Ratio (VSWR) and improving impedance matching, leading to better power transfer and reduced coupling between antennas, thereby enhancing overall communication device performance across diverse use cases and environments.
Implementation Method 1
tuning the antenna by adjusting the resonant frequency of the radiating element
Implementation Method 2
tuning a matching network of the communication device by adjusting at least one second tunable element of the matching network that is coupled to a feed point of the antenna
Data Source
AI summary
A system that incorporates teachings of the present disclosure may include, for example, a tuning system for a communication device having an antenna where the tuning system includes at least one first tunable element connected with at least one radiating element of the antenna for tuning the antenna where the adjusting of the at least one first tunable element is based on a closed loop process, and a matching network having at least one second tunable element coupled at a feed point of the antenna for tuning the matching network based on an operational parameter of the communication device. Additional embodiments are disclosed.