Antenna Reflection Coefficient Measurement Across Narrowband RF Segments
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately measuring the reflection coefficient of antennas, which is crucial for maintaining communication quality, due to the high cost and complexity of components required for broadband channel operations.
Innovation Solution
A method and device utilizing a signal processing system with a digital-to-analog converter, analog-to-digital converter, digital signal processor, and controller to measure the reflection coefficient of antennas by processing RF feedback signals, focusing on a target frequency band to reduce costs and improve measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If broadband channel components are used to measure reflection coefficient, then measurement coverage is improved, but system cost increases
Solution Approach 1:
The patent divides the broadband frequency range into multiple narrowband frequency bands. Instead of measuring the entire broadband range simultaneously with complex equipment, the system segments the measurement into multiple discrete narrowband measurements across different frequency bands, reducing the complexity of individual measurement components while maintaining overall broadband coverage.
Solution Approach 2:
The system performs periodic measurements across different frequency bands by sequentially switching between narrowband frequency ranges. The controller systematically varies the frequency band being measured, conducting repeated measurements at different frequency points to build up complete broadband reflection coefficient data through periodic sampling.
2Measurement precision
If broadband processing components are used, then measurement accuracy across frequency bands is improved, but device complexity increases
Solution Approach 1:
The patent segments the broadband measurement task into multiple narrowband measurement tasks. Each narrowband measurement can be performed with simpler, less expensive components optimized for that specific frequency range, while the controller coordinates multiple such measurements to achieve accurate broadband reflection coefficient characterization.
Solution Approach 2:
The system uses a simplified narrowband measurement setup that is repeatedly applied (copied) across multiple frequency bands. Instead of requiring one complex broadband measurement system, the patent employs a simpler measurement configuration that is systematically replicated across different frequency ranges through controller coordination.
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 allows for efficient and cost-effective measurement of antenna reflection coefficients, enhancing the quality of wireless communication by selectively improving frequency bands and reducing the need for expensive broadband processing components.
Implementation Method 1
a digital-to-analog converter (DAC) configured to convert a first digital signal to a baseband transmission signal
Implementation Method 2
an analog-to-digital converter (ADC) configured to convert a baseband feedback signal generated from the RF feedback signal to a second signal
Implementation Method 3
a feedback circuit configured to generate a baseband feedback signal by down-converting and filtering the RF feedback signal
Data Source
AI summary
A device for measuring a reflection coefficient of an antenna by using a radio frequency (RF) feedback signal provided by a coupler based on an RF transmission signal provided to the antenna includes a feedback circuit configured to generate a baseband feedback signal by down-converting and filtering the RF feedback signal, and a signal processing device configured to control the down-converting, based on a target frequency band, process a baseband transmission signal and the baseband feedback signal to have the target frequency band, and calculate a reflection coefficient of the antenna corresponding to the target frequency band. The RF transmission signal is generated from the baseband transmission signal.