Multiport Antenna Tuning for Fast and Accurate Impedance Matching
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Solution Overview
Problem
Existing methods for automatically tuning a multiple-input-port and multiple-output-port tuning unit in radio communication systems face challenges in achieving both speed and accuracy, with prior techniques either providing accurate but slow tuning or fast but inaccurate results.
Innovation Solution
A method that involves selecting a frequency, applying excitations to the input ports, sensing electrical variables, estimating tuning parameters, and generating control signals to adjust the reactance of adjustable impedance devices, allowing for a fast and accurate impedance matrix adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional automatic tuning methods are used, then tuning accuracy is improved, but tuning speed deteriorates
Solution Approach 1:
The patent segments the tuning process into two distinct phases: a fast coarse-tuning phase that quickly brings the system close to optimal impedance matching, and a subsequent fine-tuning phase that achieves precise accuracy. This segmentation allows the system to benefit from both speed and accuracy without being constrained by traditional single-phase methods.
Solution Approach 2:
The patent applies preliminary action by performing initial impedance estimation and coarse adjustment before final precise tuning. The system pre-establishes a starting point for tuning using simplified measurements and models, which significantly reduces the time required for subsequent precise optimization while maintaining accuracy.
2Speed
If fast tuning methods are used, then tuning speed is improved, but tuning accuracy deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously monitors actual impedance parameters during and after tuning operations. This feedback allows the system to detect deviations from optimal performance and apply corrective adjustments, ensuring that fast tuning methods do not compromise final accuracy.
Solution Approach 2:
The patent employs dynamic adjustment strategies where the tuning process adapts its pace and precision based on real-time system state. The system transitions from rapid coarse adjustments to slower fine adjustments as it approaches the optimal operating point, optimizing both speed and accuracy throughout the tuning sequence.
3Power
If impedance matrix adjustment is performed to ensure efficient power transfer, then power transfer efficiency is improved, but system complexity increases
Solution Approach 1:
The patent achieves efficient power transfer across multiple antennas and frequency bands using a unified impedance tuning framework. The same tuning unit and control methodology are applied universally to all ports and frequencies, avoiding the need for separate complex tuning systems for each antenna or band, thus maintaining power efficiency while controlling overall system complexity.
Data Source
AI summary
The invention relates to a method for automatically adjusting a multiple-input-port and multiple-output-port tuning unit. The invention also relates to an apparatus for radio communication using this method. An apparatus for radio communication of the invention comprises: 4 antennas which form a multiport antenna array; 4 feeders; a multiple-input-port and multiple-output-port tuning unit having 4 input ports and 4 output ports; 4 sensing units; a transmission and signal processing unit, which applies 4 excitations to the input ports, one and only one of the excitations being applied to each of the input ports, and which delivers tuning unit adjustment instructions; and a control unit, which delivers one or more tuning control signals to the multiple-input-port and multiple-output-port tuning unit.