Foldable Dipole Array Antennas Helical Alignment
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Solution Overview
Problem
Existing dipole array antennas face challenges in aligning dipole branches due to zig-zagging transmission lines and complex support structures, leading to RF performance degradation and increased costs and design complexity.
Innovation Solution
A helical communication line with hinges allows dipole branches to be rotated and moved between deployed and stowed states, enabling precise alignment and reducing the need for complex support structures, using a movement device to facilitate rotation at the hinges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional zig-zagging transmission lines and multiple support structures are used to connect dipole branches, then the antenna can be deployed, but alignment precision of dipole branches deteriorates and RF performance degrades
Solution Approach 1:
The patent combines the transmission line and support structure into a single integrated helical communication line that provides both electrical connection and mechanical support. This eliminates the need for separate support structures and reduces alignment complexity while maintaining dipole branch positioning accuracy.
Solution Approach 2:
The transmission line is configured in a helical (curved) shape that naturally accommodates the dipole branches in their deployed positions. The helical geometry provides inherent mechanical support and alignment guidance, eliminating the need for complex straight-line support structures and improving alignment precision through the curved path's natural geometry.
2Manufacturing precision
If multiple support structures are added to improve dipole branch alignment, then alignment precision improves, but device complexity and cost increase
Solution Approach 1:
The patent merges the support function into the helical communication line itself, which provides both electrical connectivity and mechanical positioning. This integration eliminates the need for additional support structures while maintaining alignment precision through the helical geometry's inherent structural properties.
Solution Approach 2:
The helical communication line serves multiple functions simultaneously: it provides electrical connection between dipole branches, acts as a support structure for mechanical positioning, and guides alignment through its curved geometry. This multi-functionality reduces the need for separate specialized components.
3Reliability
If dipole branches are deployed to improve RF performance, then signal transmission quality improves, but storage volume and weight increase
Solution Approach 1:
The patent employs foldable dipole branches that can dynamically transition between deployed and stowed configurations. When deployed, the branches provide optimal RF performance; when stowed, they reduce storage volume. The helical communication line accommodates this dynamic movement while maintaining electrical connectivity throughout the transition.
Solution Approach 2:
The dipole branches are designed to fold back and nest along the helical communication line when in the stowed position. This nesting arrangement minimizes the storage volume required, allowing the antenna to be compact when not in use while maintaining full deployment capability for optimal RF performance when needed.
Data Source
AI summary
Foldable dipole array antennas are disclosed. A disclosed example apparatus includes a helical communication line of a dipole array antenna, and hinges spaced along the helical communication line. The apparatus also includes dipole branches operatively coupled to the helical communication line, where the dipole branches are to be moved, at the hinges, between deployed and un-deployed states.