Nested Circular Parasitic Arrays for Compact Multi-Band Antennas
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing circular parasitic arrays (CPAs) cannot enable multi-band communication across widely separated frequency bands, such as between C band and Ka band, due to their limited design capabilities.
Innovation Solution
A circular parasitic array assembly is designed, which includes a first circular parasitic array configured for a lower frequency bandwidth and at least one positioned circular parasitic array positioned within or above the first array, configured for a higher frequency bandwidth, allowing for multi-band communication without increasing the overall antenna dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single circular parasitic array is designed for lower frequency bandwidth, then it can provide coverage for that band, but it cannot enable multi-band communication across widely separated frequency bands
Solution Approach 1:
The patent implements nested circular parasitic arrays where a first circular parasitic array for lower frequency bandwidth is positioned within a second circular parasitic array for higher frequency bandwidth. This nesting configuration allows both arrays to coexist in a compact arrangement, enabling multi-band communication capability while maintaining a unified antenna structure that does not significantly increase overall complexity.
2Adaptability or versatility
If multiple circular parasitic arrays are added to enable higher frequency bandwidth, then multi-band communication is enabled, but the overall antenna dimensions increase
Solution Approach 1:
By nesting the first circular parasitic array within the second circular parasitic array, the patent achieves multi-band frequency coverage without proportionally increasing the overall antenna volume. The nested configuration allows both arrays to share the same spatial envelope, maintaining a compact form factor suitable for air platform applications.
Solution Approach 2:
The patent positions the circular parasitic arrays in different spatial dimensions and orientations. The first array is positioned within the physical cylindrical volume of the second array, utilizing three-dimensional space efficiently. This dimensional arrangement enables multiple frequency bands to be supported while constraining the overall antenna volume within a compact cylindrical footprint.
3Adaptability or versatility
If circular parasitic arrays are nested within each other, then multi-band communication is enabled in a compact form, but the arrays may interfere with each other's electromagnetic fields
Solution Approach 1:
The patent applies different operational characteristics to different parts of the nested structure. The first circular parasitic array operates at lower frequency bandwidth while the second array operates at higher frequency bandwidth. By assigning distinct frequency ranges and operational modes to each nested array, the patent minimizes electromagnetic interference between them, allowing both to function simultaneously without significant mutual degradation.
Data Source
AI summary
A system may include a circular parasitic array assembly. The circular parasitic array assembly may include a first circular parasitic array configured to at least one of transmit or receive over a first bandwidth, the first circular parasitic array defined by a physical cylindrical volume. The circular parasitic array assembly may further include at least one positioned circular parasitic array including a first positioned circular parasitic array, each of the at least one positioned circular parasitic array positioned at least one of within the physical cylindrical volume of the first circular parasitic array or above the physical cylindrical volume of the first circular parasitic array, wherein the first positioned circular parasitic array is configured to at least one of transmit or receive over a second bandwidth, the second bandwidth being a higher frequency bandwidth than the first bandwidth.