Circularly Polarized Array Antenna Layout for Precise Beamforming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional circularly polarized array antennas face challenges in implementing efficient and precise beamforming due to limitations in feeding methods and configurations, particularly in downsized devices, where achieving robustness against obstacle noise and multiple reflection interference is difficult.
Innovation Solution
The design incorporates a dielectric material substrate with unit antennas featuring radiators arranged in a rotational direction with phase differences, spaced apart to minimize interference, and positioned on different layers to enhance beamforming efficiency, utilizing a corporate feed structure for improved axial ratio and individual feed lines for precise control of amplitudes and phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional circularly polarized array antenna configurations are used, then antenna functionality is achieved, but beamforming efficiency and precision deteriorate due to limitations in feeding methods and configurations
Solution Approach 1:
The antenna array is divided into multiple sub-arrays, with each sub-array having its own feeding structure. This segmentation allows independent optimization of feeding configurations for each sub-array, improving beamforming precision while managing overall system complexity through modular design
Solution Approach 2:
The patent introduces a three-dimensional feeding structure that utilizes vertical spacing between radiators in addition to horizontal arrangement. This dimensional expansion enables more flexible phase and amplitude control, achieving superior beamforming precision without proportionally increasing feeding configuration complexity
2Volume of moving object
If antenna size is reduced for downsized devices, then device compactness is improved, but robustness against obstacle noise and multiple reflection interference deteriorates
Solution Approach 1:
The patent implements non-uniform spacing between radiators, with different gap distances in different regions of the antenna array. This local variation in spacing creates specific radiation patterns that are more robust against obstacle noise and multiple reflections while maintaining compact overall dimensions
Solution Approach 2:
The antenna design incorporates adjustable phase and amplitude parameters for each radiator through the feeding structure, enabling dynamic beam steering and adaptive interference rejection. This dynamic control maintains reliability in compact configurations by electronically adjusting radiation patterns to avoid interference
3Ease of operation
If radiators are arranged in rotational direction with phase differences, then circular polarization performance is improved, but interference between neighboring radiators increases
Solution Approach 1:
The patent pre-calculates and pre-configures the phase and amplitude parameters for each radiator in the rotational arrangement to minimize mutual interference. By optimizing these parameters before operation, the design achieves good circular polarization performance while suppressing interference between neighboring radiators
Solution Approach 2:
The feeding structure acts as an intermediary that introduces controlled phase shifts and amplitude adjustments between radiators. This intermediary control mechanism enables the radiators to be arranged in a rotational pattern for circular polarization while the feeding network compensates for and reduces the interference that would otherwise occur
Data Source
AI summary
A circularly polarized array antenna may include: a dielectric material substrate; and at least one unit antenna including a plurality of radiators arranged sequentially in a rotational direction on the dielectric material substrate such that feeders of the plurality of radiators have a phase difference. The plurality of radiators may be arranged in a diagonal direction with respect to a first direction and a second direction crossing each other. Radiators neighboring each other in the first direction or the second direction, among the plurality of radiators, may be spaced apart by a gap of at least a width of the radiators neighboring each other in the first direction or the second direction.