Switched Array Antenna Layout for High-Resolution mmWave Sensing
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Solution Overview
Problem
Existing millimeter-wave sensing technologies face challenges in achieving high angle resolution without significantly increasing system overhead, as increasing the number of antenna array elements leads to a proportional increase in radio frequency channels.
Innovation Solution
The array antenna design incorporates switch units to connect multiple array elements to shared links, reducing the number of channels by using time-sharing and branch connections, and employs a data processing module for human body action recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of antenna array elements is increased to obtain high angle resolution, then the angle resolution is improved, but the system overhead increases
Solution Approach 1:
The patent segments the antenna array into multiple sub-arrays, where each sub-array shares common radio frequency channels. This segmentation allows multiple antenna elements to be grouped together and connected to shared channels through switching mechanisms, thereby reducing the total number of independent RF channels needed while maintaining the angle resolution benefits of having multiple array elements
Solution Approach 2:
The patent implements multi-functionality by designing radio frequency channels that can serve multiple antenna elements through time-sharing and switching. The same RF channel is universally used by different antenna elements at different time slots, eliminating the need for dedicated RF channels for each antenna element and thus reducing system overhead while preserving measurement precision
Data Source
AI summary
An array antenna includes M number of first array elements, N number of second array elements, at least one first link and at least one second link, where M≥2, and/or N≥2, and both of M and N are positive integers; where in a case where M≥2, at least two of the M number of first array elements are connected to corresponding first switch units, respectively; and at least two of the first array elements electrically connected to the first switch units are electrically connected to a same first link; and/or in a case where N≥2, at least two of the N number of second array elements are connected to corresponding second switch units, respectively; and at least two of the second array elements electrically connected to the second switch units are electrically connected to a same second link.