Antenna Measurement Device Reducing Blind Angles
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Solution Overview
Problem
Antenna radiation pattern measurement devices face challenges in accurately measuring RF radiation at specific angles due to obstructions caused by the rotator plate, resulting in blind angles where radiation is not detected.
Innovation Solution
A measurement device with multiple positioners is used to move and orient an antenna under test, allowing for the detection of both the main and back lobes of electromagnetic waves without obstruction by positioning the antenna to face the reflector directly, enabling accurate measurement of radiation patterns across a wider range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a rotator plate is used to move the antenna under test, then the dimensions of the measurement device are reduced, but blind angles occur where RF radiation cannot be measured accurately due to obstruction
Solution Approach 1:
The antenna positioning system is divided into multiple independent positioners (first positioner, second positioner, third positioner) that can move the antenna under test along different axes and rotate it independently. This segmentation allows the antenna to be positioned from multiple directions, eliminating the blind angle problem caused by a single rotator plate while maintaining a compact device volume.
Solution Approach 2:
The patent transitions from a single-plane rotation system (2D) to a three-dimensional positioning system. By adding positioners that operate along different axes (X-axis, Y-axis, Z-axis) and enabling multi-axis rotation, the system can access radiation patterns in all spatial dimensions, eliminating blind angles while keeping the device compact through efficient spatial utilization.
2Device complexity
If a single positioner is used to move the antenna, then the device structure is simpler, but the coverage percentage of radiation pattern measurement is reduced due to blind angles
Solution Approach 1:
The positioning function is segmented into multiple independent positioners, each responsible for a specific degree of freedom (translation along X, Y, Z axes and rotation). This segmentation enables complete spatial coverage of the radiation pattern while keeping each individual positioner structurally simple and manageable.
Solution Approach 2:
The multiple positioners work together as a unified system to achieve multi-functional capability: they can position the antenna at any location in three-dimensional space, orient it at any angle, and measure radiation patterns in all directions. This multi-functionality ensures complete measurement coverage while maintaining reasonable structural complexity through standardized positioner designs.
3Measurement precision
If the antenna is positioned to face the reflector directly to avoid obstruction, then measurement accuracy is improved, but the device requires more complex positioning mechanisms
Solution Approach 1:
The positioning mechanism is segmented into multiple independent positioners, each handling a specific movement or rotation task. This segmentation makes the complex positioning requirement manageable by breaking it down into simple, standardized components that can be controlled independently and combined to achieve the desired antenna orientation for accurate measurement.
Solution Approach 2:
The system employs dynamic positioning where the antenna can be actively adjusted in real-time to optimal measurement positions. The multiple positioners enable continuous movement and repositioning, allowing the antenna to dynamically face the reflector directly or adopt other optimal orientations depending on the measurement requirements, thereby maintaining high measurement accuracy throughout the measurement process.
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 configuration reduces blind angles and improves the accuracy of radiation pattern measurements, increasing the coverage percentage and allowing for the detection of radiation patterns that were previously obscured, enhancing the reliability of antenna performance assessment.
Implementation Method 1
a reflector configured to convert an electromagnetic wave to a plane wave
Data Source
AI summary
A measurement device and a method of measuring a radiation pattern by using the same are provided. The measurement device includes at least one positioner configured to move a first antenna for measuring a main lobe and a back lobe of an electromagnetic wave radiated from the first antenna.