Antenna Radiation Measurement via Inductive Power Modules
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Solution Overview
Problem
Current antenna radiation measurement methods face challenges such as high costs, environmental sensitivity, and time-consuming precision requirements, especially in far-field and near-field ranges, due to the need for large setups and precise probe movement, which limits accurate and efficient data collection across the entire antenna area, including backlobe measurements.
Innovation Solution
A method using measurement modules with IC chips and storage batteries that generate inductive power from high-frequency signals, allowing for stable and intense signal measurement, even with low-level frequency signals, by scanning charging frequencies and measurement frequencies separately, and converting data into far-field range data efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If far-field measurement is performed with large distance between source and tester antennas, then measurement accuracy is improved, but installation cost and environmental sensitivity increase
Solution Approach 1:
The measurement system is divided into multiple measurement modules distributed across the tester body surface, allowing far-field measurement to be performed without requiring a single large-scale setup. Each module independently measures local electromagnetic fields, and results are synthesized to obtain complete radiation characteristics.
Solution Approach 2:
A reflector antenna is introduced as an intermediary to enable near-field measurement that等效 (equivalent) to far-field measurement. The reflector creates a virtual image of the source antenna, allowing measurement in a compact space while maintaining far-field measurement accuracy through mathematical transformation of the measured data.
2Reliability
If anechoic chamber is constructed with absorbent materials for indoor measurement, then environmental influence is reduced, but construction cost increases
Solution Approach 1:
Instead of constructing expensive permanent anechoic chambers, the patent uses inexpensive measurement modules with absorbent materials that can be temporarily positioned on the tester body surface. These modules provide localized electromagnetic field absorption without requiring large-scale facility construction.
Solution Approach 2:
The patent replaces the mechanical structure of large anechoic chambers with electronic measurement modules that can be digitally configured and positioned. The measurement system uses software-based signal processing to achieve stable measurements without requiring fixed physical infrastructure.
3Measurement precision
If probe moves precisely in near-field range to obtain correct data, then measurement accuracy is improved, but equipment cost and measurement time increase
Solution Approach 1:
The continuous probe movement is segmented into discrete measurement points distributed across the tester body. Each measurement module remains stationary and measures local field characteristics, eliminating the need for precise continuous movement while maintaining measurement accuracy through spatial sampling.
Solution Approach 2:
The patent changes the measurement parameter from requiring precise positional control to using fixed-position measurement modules with known spatial coordinates. The system achieves accuracy through mathematical transformation of measurements taken at fixed points rather than through precise dynamic probe positioning.
4Measurement precision
If measurement is performed with low-level frequency signals, then measurement sensitivity is improved, but signal intensity decreases
Solution Approach 1:
Measurements from multiple measurement modules are merged and synthesized to obtain complete radiation characteristic data. By combining signals from multiple low-intensity sources, the system achieves high detection sensitivity without requiring high-power signals, as the collective measurement data compensates for individual signal weakness.
Solution Approach 2:
The measurement system uses multiple copies of measurement modules distributed across the tester body. Each module creates a local measurement copy, and these copies are synthesized to reconstruct the complete radiation pattern. This allows sensitive detection of low-level signals through spatial distribution rather than signal amplification.
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 enables rapid, accurate, and cost-effective measurement of antenna radiation characteristics across the entire antenna area, including backlobe measurements, within a short period, reducing the need for extensive setups and minimizing environmental impact.
Implementation Method 1
a charging high frequency of several hundred megahertz (MHz) to several hundred gigahertz (GHz) is scanned toward a tester body such that inductive power is generated for self-charging
Data Source
AI summary
Disclosed is a method of measuring the radiation characteristic of an antenna, where sufficient power is secured within a short period of time and supplied in a stable manner so as to always keep the intensity of measurement signals high irrespective of the measurement frequency. With the antenna radiation measurement method, upon receipt of measurement frequency signals, location information and measured values are processed to transmit measurement signals, and a charging high frequency of several hundred megahertz (MHz) to several hundred gigahertz (GHz) is scanned toward a tester body such that inductive power is generated to allow the self-charging. The measurement frequency signals are transmitted toward the tester body through a source antenna, and the measured signals transmitted from the measurement antennas of the respective measurement modules are received and data-processed at a measurement controller.