Polarized Antenna Sub-Array Layout for Balanced Radiation Symmetry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The symmetry of the radiation pattern in sub arrays with radiation electrodes on a dielectric substrate is impaired, leading to biased directivity, which affects the symmetry and characteristics of the array antenna when used in antenna modules.
Innovation Solution
An antenna module comprising a support substrate with four sub arrays, each radiating different polarized waves, is configured such that the sub arrays are disposed in alternating directions to prevent bias in the radiation pattern and improve symmetry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If radiation electrodes are disposed at positions shifted from the center position of the dielectric substrate, then the sub array can be formed with compact layout, but the symmetry of the radiation pattern is impaired and directivity becomes biased
Solution Approach 1:
The patent applies asymmetry principle by intentionally introducing asymmetric elements (reflectors or additional radiation electrodes) to counterbalance the asymmetry caused by the shifted radiation electrode positions. This creates a symmetric radiation pattern overall, resolving the contradiction between compact layout and pattern symmetry.
Solution Approach 2:
The patent uses counterbalancing elements (reflectors or additional electrodes) that produce radiation patterns opposite to the biased pattern from shifted electrodes. These counter-elements compensate for the directivity bias, restoring symmetry to the overall radiation pattern while maintaining compact electrode positioning.
2Ease of manufacture
If sub arrays with biased directivity are used to form an array antenna, then the array antenna can be constructed with available sub arrays, but the symmetry of the radiation pattern in the entire array antenna is not ensured
Solution Approach 1:
The patent introduces asymmetric compensating elements within each sub array to counterbalance the inherent asymmetry from shifted electrodes. This allows the use of compact sub arrays while restoring overall symmetry at the array antenna level through the compensating asymmetric elements.
Solution Approach 2:
The patent merges multiple elements (shifted radiation electrodes with reflectors or additional counterbalancing electrodes) within each sub array to achieve symmetric radiation patterns. By combining these elements, the sub arrays maintain compact layout while producing symmetric overall patterns when assembled into the array antenna.
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 configuration ensures balanced directivity in both X-axis and Y-axis directions, enhancing the symmetry and overall antenna characteristics by preventing unbalanced directivity in the array antenna.
Implementation Method 1
Each of the first sub array, the second sub array, the third sub array, and the fourth sub array includes a plurality of radiation electrodes disposed along an extending direction of the long side. The first sub array can radiate radio waves of a first polarized wave, and the second sub array can radiate radio waves of a second polarized wave.
Implementation Method 2
The first sub array, the second sub array, the third sub array, and the fourth sub array have a rectangular substrate that is disposed on a support substrate and includes a long side and a short side when the support substrate is viewed in plan view.
Data Source
AI summary
An antenna module includes a first sub array to a fourth sub array. The first sub array to the fourth sub array have a rectangular substrate. Each of the first sub array to the fourth sub array includes a plurality of radiation electrodes disposed along an extending direction of a long side. The first sub array to the fourth sub array are configured to radiate radio waves of the first polarized wave to the fourth polarized wave, respectively. The first polarized wave is different from the second polarized wave, and the third polarized wave is different from the fourth polarized wave. The first polarized wave is the same as the third polarized wave, and the second polarized wave is the same as the fourth polarized wave.