Antenna Tuning Circuit Using Valid Tune Codes Across Frequency Bands
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Solution Overview
Problem
Existing electronic devices face challenges in efficiently managing antenna impedance changes due to environmental factors, leading to reduced wireless signal transmission efficiency, particularly in devices with metal casings.
Innovation Solution
A tuning circuit controlled by a processor using tune codes to dynamically adjust impedance, identifying valid tune codes based on predetermined rules and frequency bands to optimize antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tuning process measures antenna impedance in real time and compensates for impedance mismatch and resonant frequency, then antenna performance is improved, but time and computational resources are consumed
Solution Approach 1:
The patent pre-calculates and stores valid tune codes in a lookup table during system initialization or offline processing. When real-time tuning is needed, the system simply queries the pre-computed table based on current frequency and environmental conditions, eliminating the need for time-consuming real-time impedance measurement and optimization calculations.
Solution Approach 2:
The patent creates a simplified model (lookup table with pre-computed tune codes) that replicates the results of complex real-time impedance analysis. This copy approach allows the system to achieve similar antenna performance without reproducing the computationally intensive measurement and optimization process in real-time.
2Reliability
If multiple tune codes are generated and tested to select effective ones for different frequency bands, then antenna impedance matching is improved, but computational complexity and time increase
Solution Approach 1:
The patent divides the frequency spectrum into distinct bands and pre-computes valid tune codes for each band separately. This segmentation allows the system to manage complexity by handling each frequency band with dedicated optimized codes rather than attempting to optimize for all frequencies simultaneously, reducing the overall search space and computational burden.
Solution Approach 2:
The patent performs the complex task of generating and validating multiple tune codes in advance during system initialization or offline processing. By pre-computing and storing the optimal tune codes for different frequency bands in a lookup table, the system eliminates the need for real-time generation and testing of multiple codes, significantly reducing operational complexity.
Data Source
AI summary
An electronic device includes an antenna, a tuning circuit connected to the antenna and including a plurality of elements, and a processor controlling the tuning circuit using a tune code having a plurality of bits, respectively corresponding to the plurality of elements. The processor may identify a plurality of valid tune codes from among tune codes having different values, based on the elements, the valid tune codes satisfying a predetermined default rule for at least a portion of the bits, identify first band tune codes from among the valid tune codes, the first band codes satisfying a first band rule set for bits corresponding to at least one capacitor array, and control the tuning circuit using one of the first band tune codes when the electronic device transmits and/or receives a signal of a first frequency band. The processor applies other tune codes in at least one other frequency band.