Transparent Antenna Structure for Nested Multi-Band Integration
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Solution Overview
Problem
Existing antenna designs face challenges in integrating multiple frequency bands without increasing size or mechanical complexity, and prior solutions compromise performance or require additional components.
Innovation Solution
An antenna structure with an inductive element that allows higher frequency bands to be placed underneath, inhibiting interference and maintaining performance by using a coiled or helical conductor for electromagnetic transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If antenna size is reduced to decrease mutual coupling between adjacent antennas, then integration density is improved, but radiation pattern performance deteriorates due to physical limits of miniaturization
Solution Approach 1:
The patent embeds higher band radiating elements inside lower band radiating elements, creating a nested configuration where multiple frequency bands share the same spatial footprint. This nesting approach increases integration density without requiring separate antenna elements for each band, thereby avoiding the performance degradation associated with miniaturization while maintaining adequate element spacing for proper radiation patterns.
Solution Approach 2:
The patent utilizes the vertical dimension by placing higher band elements inside lower band elements along the z-axis, effectively transitioning from a two-dimensional planar arrangement to a three-dimensional nested structure. This dimensional change allows multiple radiating elements to coexist without increasing the horizontal footprint, achieving high integration density while preserving radiation performance through maintained element separation.
2Productivity
If higher band radiators are embedded inside lower band radiators, then integration density is improved, but mechanical complexity increases due to additional components and constrained placement freedom
Solution Approach 1:
The patent combines multiple radiating elements for different frequency bands into a single integrated antenna structure. By merging the higher band and lower band radiators into one unified antenna assembly with shared support structures and common mounting interface, the design reduces mechanical complexity and eliminates the need for separate mounting hardware for each band, thereby simplifying installation while maintaining high integration density.
Solution Approach 2:
The patent creates a universal antenna structure that can radiate multiple frequency bands simultaneously through a single integrated design. The antenna system performs multiple functions (supporting both lower and higher band operations) through shared mechanical structures and common feeding networks, eliminating the need for band-specific mounting components and reducing overall mechanical complexity.
3Adaptability or versatility
If multiple frequency bands are integrated in a single antenna, then site acquisition is facilitated, but transparency to higher band radiating elements is compromised causing interference and signal distortion
Solution Approach 1:
The patent applies different structural characteristics to different parts of the antenna system. The lower band radiator is designed with specific geometric properties optimized for its frequency range, while the higher band element nested inside it has different dimensional characteristics optimized for higher frequencies. This local differentiation allows each band to operate independently with minimal mutual interference, maintaining transparency to higher band radiating elements while achieving multi-band integration.
Solution Approach 2:
The patent segments the antenna system into distinct lower band and higher band radiating elements with separate feeding networks and independent optimization. By dividing the multi-band antenna into functionally separate segments that operate independently, the design achieves multi-band capability while minimizing harmful interactions between bands, as each segment can be optimized for its specific frequency range without compromising the other.
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
Enables increased integration density and maintains performance across frequency bands by minimizing interference and distortion, suitable for base station antennas.
Implementation Method 1
an inductive element, configured to inhibit interference of the second antenna with electromagnetic radiation emitted from the first antenna
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3
AI summary
Described is an antenna structure (100, 400) comprising a first antenna (101, 402, 403) configured to emit electromagnetic radiation having a first operational frequency band; a second antenna (102, 200, 401, 500) configured to emit electromagnetic radiation having a second operational frequency band; wherein the second antenna comprises an inductive element (103, 203, 501) configured to inhibit interference of the second antenna with the electromagnetic radiation emitted from the first antenna (101). The antenna structure may have ultra broadband RF transparency, which allows for placement of other radiating elements for higher frequency bands directly underneath the antenna and therefore increasing the density of integration of base station antennas.