Radome Null Pattern Formation for Antenna Direction Adjustment
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Solution Overview
Problem
High-frequency radio communication systems face challenges in adjusting the direction of transmission-side antennas due to narrow radio beams, which reduces installation efficiency.
Innovation Solution
A radome with distinct regions having different radio-wave transmission characteristics is used to form a null pattern in the front direction of the antenna, facilitating easier adjustment by superimposing radio waves passing through these regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the frequency is heightened and the antenna diameter is increased to lengthen communication distance, then the communication distance is extended, but the radio beam width becomes narrow making direction adjustment difficult
Solution Approach 1:
The radome is divided into multiple regions (first region, second region, third region) with different radio-wave transmission characteristics. Each region introduces a specific phase shift to the transmitted radio waves, allowing the formation of a null pattern in the front direction of the antenna. This segmentation enables the narrow main lobe to be transformed into a wider pattern with detectable nulls, facilitating easier direction adjustment while maintaining extended communication distance.
Solution Approach 2:
Different regions of the radome are assigned different local qualities in terms of radio-wave transmission characteristics. The first region has a first phase shift characteristic, the second region has a second phase shift characteristic, and the third region has a third phase shift characteristic. This local quality variation across the radome surface creates the desired null pattern formation, enabling the reception-side antenna to detect direction by identifying null positions rather than searching through a narrow main lobe.
2Measurement precision
If the beam width is narrowed for high-frequency communication, then the directional precision is improved, but the time required to detect the main lobe and adjust antenna direction increases
Solution Approach 1:
Instead of trying to detect the main lobe of the narrow radio beam directly, the invention inverts the approach by creating a null pattern (minimum signal direction) in the front direction of the antenna. The reception-side antenna detects direction by identifying the null position rather than the main lobe position. This inversion transforms the detection problem from finding a narrow peak to identifying a wider null region, significantly reducing adjustment time while maintaining directional precision.
Solution Approach 2:
The radome acts as an intermediary device between the transmission-side antenna and the reception-side antenna. It modifies the radio-wave transmission by introducing region-specific phase shifts that create a null pattern. This intermediary transformation allows the reception-side antenna to easily detect direction through null positioning rather than directly detecting the narrow main lobe, thereby reducing adjustment time while preserving measurement precision.
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 allows for easier detection and adjustment of antenna direction, improving the efficiency of radio system installation by widening the high-intensity portion's angle and increasing sensitivity near the front direction.
Implementation Method 1
the radome is configured to form a null pattern in substantially a front direction of the antenna by superimposing a first radio wave that has passed through the first region and a second radio wave that has passed through the second region
Data Source
AI summary
A radome (20) includes a first region (20A) and a second region (20B) having different radio-wave transmission characteristics from each other, and is configured to form a null pattern in substantially a front direction of an antenna by superimposing a first radio wave that has passed through the first region (20A) and a second radio wave that has passed through the second region (20B).