RA-FA Antenna Beam Steering for Millimeter-Wave WLAN
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in achieving efficient beamforming with specific azimuth and elevation targeting due to limited bandwidth and the need for more precise beam control, especially in millimeter-wave frequencies, where devices operate with different communication standards.
Innovation Solution
A reflect array-feeding array (RA-FA) antenna system that includes a first reflector array with a phase shift distribution to narrow the beamwidth in the elevation plane while maintaining the same beamwidth in the azimuth plane, and a second reflector array with a different phase shift distribution to widen the beamwidth in the elevation plane, along with a phased antenna array for beam-steering capabilities, allowing switching between the two arrays for optimal beam direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beamforming is performed to improve wireless network efficiency, then communication efficiency is improved, but it becomes difficult to transmit a beam with a particular azimuth and elevation
Solution Approach 1:
The antenna system is segmented into two independent reflector arrays (first and second reflector arrays), each capable of producing reflected beams with different beamwidth characteristics in the elevation plane. This segmentation allows the system to independently control beam characteristics for different communication scenarios, resolving the difficulty of precise beam direction control while maintaining communication efficiency.
Solution Approach 2:
The system dynamically switches between the first and second reflector arrays based on communication requirements. The switching mechanism allows the beamwidth in the elevation plane to be adjusted dynamically - using the first array for narrower beams when precise targeting is needed, and the second array for wider beams when broader coverage is required, thereby achieving both communication efficiency and ease of beam direction control.
2Adaptability or versatility
If a single reflector array is used, then device complexity is reduced, but adaptability to different communication standards and beam requirements is limited
Solution Approach 1:
The dual reflector array system is designed to serve multiple communication standards and beam requirements through a single integrated structure. The first and second reflector arrays provide different beamwidth characteristics, enabling the system to adapt to various communication scenarios (narrow beam for precise targeting, wide beam for broader coverage) and different wireless standards, thereby achieving universality without requiring multiple separate antenna systems.
Solution Approach 2:
The system merges two reflector arrays with different phase shift distributions into a single integrated antenna system with a unified feeding array. This combining approach allows the system to provide both narrow and wide beam capabilities simultaneously, enhancing adaptability to different communication standards while avoiding the complexity of managing completely separate antenna systems.
3Measurement precision
If beamwidth is narrowed in the elevation plane, then directional precision is improved, but beam coverage in the elevation plane is reduced
Solution Approach 1:
The system dynamically adjusts the beamwidth in the elevation plane by switching between the first and second reflector arrays. When directional precision is prioritized, the first reflector array produces a narrower beamwidth. When beam coverage area is prioritized, the second reflector array produces a wider beamwidth. This dynamic adjustment allows the system to optimize between precision and coverage based on real-time communication requirements.
Solution Approach 2:
Different regions of the radiation pattern are optimized with different qualities: the first reflector array provides high directional precision (narrow beamwidth) for targeted communication, while the second reflector array provides extensive coverage (wide beamwidth) for broad area communication. The system selects the appropriate reflector array based on whether local precision or local coverage is the priority, effectively applying local quality optimization to different parts of the radiation pattern.
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 RA-FA antenna system enables efficient beam control with narrower or wider beamwidths in the elevation plane while maintaining constant azimuth beamwidth, enhancing communication efficiency and adaptability across different communication standards in millimeter-wave frequencies.
Implementation Method 1
a feeding array including a phased antenna array with a beam-steering ability to direct the incident beam at the first plurality of reflecting elements
Implementation Method 2
a first reflector array including a first plurality of reflecting elements with a first phase shift distribution configured to reflect an incident beam to generate a first reflected beam
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A reflect array-feeding array (RA-FA) antenna is disclosed. The RA-FA antenna comprising: a reflect array base comprising a plurality of reflecting elements with a phase shift distribution to reflect an incident beam to generate a reflected beam having a narrower beamwidth in an elevation plane and a same beamwidth in an azimuth plane, and a feeding array comprising a phased antenna array with a beam-steering ability to direct the incident beam at the reflecting elements. The reflecting elements may be configured in a pattern with rows and columns and reflecting elements along rows have a same phase shift, and reflecting elements along columns have phase shifts to narrow the incident beam to form the reflected beam narrower in the elevation plane.