Antenna Array Isolator Layout for Beam-Tilting Interference
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Solution Overview
Problem
Array antennas in electronic devices experience performance degradation due to interference between adjacent radiation patches during beam tilting, affecting wireless communication stability and efficiency, especially in mmWave bands.
Innovation Solution
Incorporating an isolator with a conductor configuration generating a 180-degree phase difference between adjacent radiation patches to create an isolation structure, which suppresses electromagnetic interference and stabilizes antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If radiation patches are arrayed at intervals less than a few millimeters to achieve compact array antenna, then antenna size is reduced, but interference between adjacent radiation patches deteriorates antenna performance
Solution Approach 1:
An isolation structure is introduced as an intermediary element positioned between adjacent radiation patches. This isolation structure includes conductive elements that generate electromagnetic fields to cancel out the interfering fields from neighboring patches, thereby mediating the interaction between closely-spaced patches and preventing performance deterioration while maintaining compact size.
2Reliability
If isolation structure is formed between adjacent radiation patches to suppress interference, then antenna performance stability is improved, but device complexity increases
Solution Approach 1:
The isolation structure utilizes thin conductive films or shell-like conductive elements positioned between radiation patches. These thin-film structures provide effective electromagnetic isolation while occupying minimal space and adding limited structural complexity compared to bulk isolation materials.
Solution Approach 2:
The isolation structure's conductive parameters (such as conductivity, thickness, or geometric configuration) are optimized to achieve effective interference suppression at specific frequency ranges. By adjusting these parameters, the isolation performance can be tuned without proportionally increasing the overall structural complexity.
3Area of stationary object
If beam tilting is performed using phase difference feeding to secure sufficient coverage, then wireless coverage area is expanded, but distortion or antenna performance deviation depending on orientations occurs
Solution Approach 1:
The isolation structure is designed to preemptively counteract the orientation-dependent performance deviations that occur during beam tilting. By pre-positioning isolation elements that generate opposing electromagnetic fields, the structure compensates for interference effects before they significantly impact performance across different beam orientations.
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
The isolator effectively reduces distortion and maintains consistent antenna performance across various orientations during beam tilting, enhancing wireless communication reliability and efficiency in mmWave bands.
Implementation Method 1
The first portion and the second portion may be configured to generate current flows having a phase difference of 180 degrees with respect to each other
Implementation Method 2
Interference between adjacent radiation patches may deteriorate antenna performance when the array antenna operates
Data Source
AI summary
According to various embodiments of the disclosure, an antenna device comprises: a first antenna array including an array of a plurality of first radiation patches, a communication circuit configured to transmit and/or receive a radio signal using at least one of the first radiation patches, and at least one first isolator comprising a conductor disposed in an area between two adjacent first radiation patches among the first radiation patches. The first isolator may include a first portion, a second portion disposed in parallel with the first portion, and a third portion electrically connecting the first portion with the second portion. The first portion and the second portion may be configured to generate current flows having a phase difference of 180 degrees with respect to each other.