Antenna Tuning Device Impedance Measurement via Multiple Sampling

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Solution Overview

Problem

Wireless communication equipment antennas face performance issues due to impedance mismatches and resonance frequency changes caused by environmental factors, leading to reduced antenna output efficiency, increased power consumption, and potential call drops at cell boundaries.

Innovation Solution

The implementation of an antenna tuning device that performs real-time impedance measurement and compensation by generating multiple sampling data points to calculate and adjust the antenna's resonance frequency and impedance, using a tuning control circuit, RF front-end, and antenna tuner to optimize performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If antenna tuning is performed using single sampling method, then device complexity is reduced, but measurement precision deteriorates leading to inaccurate impedance measurement

Engineering Contradiction:

Improvetuning device structureVSAvoidimpedance measurement accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent applies partial action by performing multiple sampling operations (excessive sampling) on the transmission and reception signals. Instead of a single measurement, the system performs multiple sampling cycles and uses the accumulated sampling data to calculate more accurate impedance values, thereby improving measurement precision without requiring fundamentally more complex hardware

Inventive Principle:

Principle #16Partial or excessive action

2Measurement precision

If multiple sampling is performed on transmission and reception signals, then measurement precision is improved, but use of energy increases

Engineering Contradiction:

Improveimpedance measurement accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The system implements periodic action by performing multiple sampling operations at regular intervals during the measurement period. The sampling is conducted periodically across multiple cycles, allowing accurate impedance measurement through accumulated data while managing energy consumption by structuring the sampling in organized periodic bursts rather than continuous operation

Inventive Principle:

Principle #19Periodic action

3Device complexity

If antenna tuning is not performed in real-time, then device complexity is reduced, but adaptability deteriorates causing performance degradation in changing environments

Engineering Contradiction:

Improvetuning control structureVSAvoidenvironmental adaptation capability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent implements feedback by continuously measuring the reception signal and using it to calculate impedance values in real-time. The system feeds back the measured impedance information to adjust the antenna tuning, creating a closed-loop control system that adapts to changing environmental conditions such as hand-grip, USB connection, or earphone jack insertion

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system applies dynamics by making the antenna tuning adjustable and changeable in real-time based on measured conditions. Instead of fixed tuning parameters, the system dynamically adjusts the antenna characteristics according to the calculated impedance values, enabling adaptation to varying operational environments

Inventive Principle:

Principle #15Dynamics

4Adaptability or versatility

If impedance measurement is performed during frequency allocation changes, then adaptability is improved, but measurement precision deteriorates due to frequency variation

Engineering Contradiction:

Improvefrequency adaptation capabilityVSAvoidimpedance measurement accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The system applies preliminary action by completing multiple sampling operations and calculating impedance values before the frequency allocation changes take effect. By performing the measurement and calculation in advance during the measurement period, the system ensures accurate impedance data is obtained before frequency variations occur, maintaining measurement precision while still adapting to frequency changes

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11064505B2Antenna tuning devices and antenna tuning methods

Publication Date: 2021.07.13 SAMSUNG ELECTRONICS CO LTD

AI summary

Antenna tuning may include performing multiple sampling on a transmission signal applied to an antenna and a reception signal corresponding to the transmission signal during a period for which a first frequency is allocated to the transmission signal, such that sampling data are generated based on the multiple sampling, the sampling data including data corresponding to the transmission signal and data corresponding to the reception signal. The method may include calculating a parameter based on the sampling data, and tuning the antenna based on the parameter. A device may include a control circuit to perform the multiple sampling and set a tuning value, a radio frequency front-end to modulate the transmission signal based on the frequency and apply a return signal of the transmission signal or a reflection signal, and an antenna tuner to adjust a resonance frequency or an impedance of the antenna according to the tuning value.