Staggered Antenna Array Beamwidth Control via Movable Radiators
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modern wireless antenna systems require precise mechanical phase shifters for beamwidth control, which are costly, heavy, and inefficient due to the need for accurate amplitude and phase signal distribution, and often fail to suppress intermodulation under high power RF signals.
Innovation Solution
A mechanically variable antenna system with slidably mounted radiators and actuators that adjust their position relative to a reflector to change beamwidth, using a phase shifting network for elevation beam tilt, allowing for variable beamwidth and tilt control without the need for multiple mechanical phase shifters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mechanical phase shifters are used for beamwidth control, then beamwidth accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the phase shifting function from separate mechanical phase shifters and integrates it into the reflector surface itself by making radiating elements movable. This eliminates the need for complex external phase shifting devices while maintaining beamwidth control accuracy through direct geometric adjustment of the antenna elements relative to the reflector.
Solution Approach 2:
The patent implements dynamic beamwidth control by making radiating elements movable along the reflector surface. The elements can be repositioned to create different aperture distributions, enabling continuous adjustment of beamwidth without requiring complex static phase shifting networks. This dynamic geometric configuration replaces complex mechanical phase shifters with simpler movable element mechanisms.
2Measurement precision
If highly accurate mechanical phase shifters are used, then beamwidth control precision is improved, but weight increases
Solution Approach 1:
The patent replaces heavy mechanical phase shifting devices with a lighter system based on movable radiating elements along the reflector. Instead of using complex mechanical phase shifters with precision gears and dielectric materials, the invention uses simpler linear motion mechanisms that allow elements to slide along the reflector surface, significantly reducing overall system weight while maintaining control precision.
3Manufacturing precision
If mechanical phase shifters with rigid support are used, then manufacturing accuracy is improved, but cost increases
Solution Approach 1:
This principle doesn't apply to this patent. The patent achieves manufacturing cost reduction through geometric simplification rather than material property changes.
Solution Approach 2:
The patent changes the fundamental parameter of beamwidth control from electrical phase shifting to geometric aperture adjustment. By controlling the physical positions of radiating elements along the reflector rather than using complex phase shifting networks, the system achieves equivalent control precision with much simpler manufacturing requirements and lower costs.
4Ease of manufacture
If lower cost mechanical phase shifters are used, then manufacturing cost is reduced, but passive intermodulation suppression deteriorates
Solution Approach 1:
The patent replaces mechanical phase shifters with a reflector-based geometric control system. This substitution eliminates the RF signal paths through complex mechanical devices that generate passive intermodulation products. By using direct geometric positioning of radiating elements relative to the reflector, the system achieves beamwidth control without the harmful intermodulation effects inherent in traditional phase shifter designs.
Data Source
AI summary
An antenna adapted for wireless networks and having a variably controlled stagger antenna array architecture is disclosed. The antenna array contains a plurality of driven radiating elements that are spatially arranged having each radiating element or element groups orthogonally movable relative to a main vertical axis so as to provide a controlled variation of the antenna array's azimuth radiation pattern.