Tilted Radiating Array Layout for Upper Sidelobe Suppression
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Solution Overview
Problem
Existing base station antenna assemblies face challenges in suppressing the upper side lobe while maintaining radiation efficiency, leading to interference with surrounding wireless devices and satellite communication.
Innovation Solution
An antenna assembly with a reflection panel and radiating array, where radiating elements are disposed at acute angles relative to the first direction, utilizing pattern multiplication to suppress the upper side lobe without amplitude or phase weighting, and incorporating a phase shifter for further control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If array amplitude weighting or phase weighting is used to suppress the upper side lobe, then the upper side lobe level is reduced, but radiation efficiency is significantly reduced
Solution Approach 1:
The patent introduces a third dimension by tilting the radiating elements at acute angles relative to the first direction, transforming a two-dimensional array problem into a three-dimensional spatial arrangement. This dimensional change enables upper side lobe suppression through geometric configuration rather than amplitude/phase weighting, thereby maintaining radiation efficiency while achieving the desired pattern control
Solution Approach 2:
The patent changes the spatial orientation parameter of the radiating elements by disposing them at acute angles with respect to the first direction. This parameter change in element orientation creates the desired radiation pattern that suppresses upper side lobes without requiring amplitude or phase modifications that would reduce radiation efficiency
2Adaptability or versatility
If conventional antenna assemblies are used, then coverage is provided, but interference is caused to surrounding wireless devices and satellite communication
Solution Approach 1:
The patent applies local quality by creating direction-specific radiation characteristics through the tilted element arrangement. The acute angle orientation of radiating elements locally directs energy toward the intended coverage area while suppressing radiation in directions that would cause interference to surrounding devices and satellite communications
Solution Approach 2:
By introducing the acute angle orientation in three-dimensional space, the patent adds a spatial dimension to pattern control. This enables the antenna assembly to provide comprehensive coverage in the desired directions while simultaneously suppressing interference in other directions, resolving the contradiction between coverage and interference
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
Effectively reduces the upper side lobe radiation power, maintaining high radiation efficiency and aperture utilization, and enabling coexistence with satellite communication on the same frequency band.
Implementation Method 1
by using a principle of pattern multiplication for antenna array, when the radiation direction of the at least one radiating element is at the acute angle with the first direction, an upper side lobe of the antenna assembly may be effectively suppressed
Implementation Method 2
The reflection panel includes a reflection surface, and the radiating array is disposed on the reflection surface
Data Source
AI summary
An antenna assembly is provided. The antenna assembly provided in this application includes a reflection panel and a radiating array. The reflection panel includes a reflection surface, the radiating array includes N radiating elements, and the N radiating elements are sequentially disposed on the reflection surface along a first direction. The reflection surface includes a deflection surface, and a normal direction of the deflection surface is disposed at an acute angle with the first direction. The N radiating elements are attached to the reflection surface, and at least one radiating element of the N radiating elements is located on the deflection surface, so that a radiation direction of the at least one radiating element is disposed at an acute angle with the first direction. In such antenna assembly, radiation power of the antenna assembly in a direction opposite to the first direction can be effectively reduced.