Adaptive Array Antenna Null-Point Compensation for Reliable Reception
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Solution Overview
Problem
Adaptive array antennas face challenges in maintaining directivity and reducing shadow regions (null points) during radio wave reception, which affects communication reliability and compatibility with wide-area broadcasting and intelligent transport systems.
Innovation Solution
An electronic device equipped with an adaptive array antenna and a controller that performs digital signal processing to adjust weights and phases of antenna elements, compensating for null points and enhancing directivity to improve communication reliability and compatibility with both localized and wide-area communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adaptive array antenna controls directivity to improve communication reliability in specific directions, then reception sensitivity in desired directions is improved, but shadow regions (null points) are created in other directions
Solution Approach 1:
The patent applies dynamics by making the antenna system adaptable and changeable. The controller dynamically adjusts the weights and phases of individual antenna elements based on the reception environment, allowing the directivity pattern to be optimized in real-time. This dynamic adjustment enables the system to reduce shadow regions while maintaining improved directivity in desired directions, resolving the contradiction between communication reliability and shadow region formation.
Solution Approach 2:
The patent employs parameter changes by modifying the electrical characteristics (weights and phases) of antenna elements. The controller changes these parameters adaptively based on reception conditions to control the directivity pattern. By adjusting these parameters, the system can suppress shadow regions in certain directions while enhancing reception in desired directions, thereby resolving the technical contradiction.
2Reliability
If adaptive array antenna enhances directivity for localized communication, then communication reliability is improved, but compatibility with wide-area broadcasting is reduced
Solution Approach 1:
The patent applies dynamics by enabling the antenna system to adapt its directivity pattern based on the type of communication required. The controller can dynamically switch between localized high-directivity modes for reliable point-to-point communication and wide-area broadcasting modes by adjusting the weights and phases of antenna elements. This dynamic adaptability allows the system to maintain high communication reliability while also supporting wide-area broadcasting applications.
Solution Approach 2:
The patent implements universality by designing the adaptive array antenna system to perform multiple functions. The same antenna array and controller can provide both localized high-reliability communication and wide-area broadcasting capabilities by adaptively adjusting the directivity pattern. This multi-functionality resolves the contradiction between enhanced directivity for localized communication and compatibility with wide-area broadcasting.
Data Source
AI summary
An electronic device includes an array antenna and a controller. The array antenna includes a plurality of antenna elements. The controller is configured to exercise control to transmit and/or receive a radio wave through the array antenna. The controller controls directivity of the array antenna and compensates at least partially for reception sensitivity at a null point in the directivity of the array antenna by using a predetermined antenna element of the array antenna.