Antenna Matching Network Timing for Multi-Band Impedance Tuning
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Solution Overview
Problem
Existing multi-frequency wireless devices face performance compromises due to size and aesthetic design constraints, leading to inefficient antenna performance across multiple frequency bands and use cases, with fixed circuit components failing to optimize power transfer effectively.
Innovation Solution
A method and apparatus for radio antenna tuning that utilize a tunable matching network with variable reactance elements, controlled by a processor to adjust impedance in smaller, incremental steps, satisfying phase and amplitude shift criteria to achieve desired tuning values, even during active carrier operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If fixed value components are used in the circuit to improve power transfer, then power transfer efficiency is improved, but the ability to cover multiple frequency bands is compromised
Solution Approach 1:
The patent applies dynamics by replacing fixed value components with variable reactance elements that can be dynamically adjusted. The matching network includes variable capacitors and inductors whose values can be changed electronically to optimize power transfer across different frequency bands, thereby achieving both high efficiency and multi-band adaptability
Solution Approach 2:
The patent implements parameter changes by allowing the reactance values of the matching network components to be varied based on the operating frequency and conditions. The controller adjusts the capacitance and inductance parameters in real-time to maintain optimal power transfer efficiency across multiple frequency bands, resolving the contradiction between fixed efficiency and variable adaptability
2Volume of moving object
If antenna structure is compromised for size and aesthetic design, then device portability and appearance are improved, but antenna performance over entire frequency range deteriorates
Solution Approach 1:
The patent uses dynamics by implementing a controllable matching network that adapts to different operating conditions. The variable reactance elements can be electronically tuned to compensate for the performance limitations imposed by the compact antenna structure, maintaining reliable communication across frequency bands despite the reduced physical size
Solution Approach 2:
The patent applies feedback through a controller that monitors communication quality and adjusts the matching network parameters accordingly. The system measures performance metrics and dynamically modifies the reactance values to optimize antenna performance, thereby maintaining reliability even with a compact antenna design constrained by size requirements
3Speed
If impedance tuning is performed rapidly, then tuning speed is improved, but signal degradation and bit errors increase
Solution Approach 1:
The patent applies segmentation by dividing the impedance tuning process into multiple discrete steps rather than performing a single large adjustment. The controller breaks down the total reactance change into smaller incremental steps, allowing the system to achieve fast overall tuning while maintaining signal quality by avoiding large abrupt changes that would cause degradation and bit errors
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 reduces signal degradation and bit errors by allowing precise impedance tuning, ensuring optimal performance across multiple frequency bands and use cases without compromising signal quality.
Implementation Method 1
a tunable matching network (1402) having a variable reactance, the matching network coupled with the transceiver and the antenna
Implementation Method 2
A method and apparatus for radio antenna tuning that utilize a tunable matching network with variable reactance elements
Data Source
AI summary
A system that incorporates teachings of the present disclosure may include, for example, determining, by a controller of a mobile communication device, a phase shift criteria and an amplitude shift criteria associated with a modulation being implemented by the mobile communication device. The controller can determine a group of tuning steps that satisfies the phase and amplitude shift criteria and that provides a desired tuning step for a matching network of the mobile communication device. Additional embodiments are disclosed.