Multi-Band Antenna Layout Using FSS to Limit Pattern Distortion
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Solution Overview
Problem
Current multi-band antenna systems face challenges in maintaining optimal performance due to induced currents from feeding networks affecting radiating element arrays, leading to distorted antenna patterns and resonance issues.
Innovation Solution
A multi-band antenna system design incorporating a frequency selective surface (FSS) is introduced between stacked radiating element arrays, with feeding networks electrically connected to the FSS, reducing the impact of induced currents and enhancing system performance by allowing electromagnetic waves to pass through or be reflected as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If feeding networks are placed close to radiating element arrays for compact design, then device complexity is reduced, but induced currents from feeding networks distort antenna patterns and cause resonance issues
Solution Approach 1:
A frequency selective surface (FSS) is introduced as an intermediary component between the feeding networks and radiating element arrays. The FSS selectively transmits or reflects electromagnetic waves at different frequencies, preventing harmful induced currents from reaching the radiating elements while maintaining compact integration. This mediator resolves the contradiction by allowing close placement of feeding networks without compromising antenna pattern integrity.
Solution Approach 2:
The FSS is designed with spatially varying properties to provide different electromagnetic characteristics at different locations and frequencies. By tailoring the local electromagnetic properties of the FSS, the system achieves frequency-selective behavior that protects specific radiating elements from induced currents while maintaining overall system compactness.
2Adaptability or versatility
If multiple frequency bands are integrated in a compact antenna system, then adaptability is improved, but interference between frequency bands increases
Solution Approach 1:
The FSS acts as a frequency-selective intermediary that allows different frequency bands to coexist in a compact multi-band antenna system. By designing the FSS with specific resonant frequencies, it selectively transmits desired frequency bands while reflecting or blocking interfering frequencies, enabling multi-band operation without mutual interference.
Solution Approach 2:
The antenna system is segmented into distinct frequency band regions using FSS structures. Each FSS layer is designed to handle specific frequency ranges, creating frequency-specific transmission paths that prevent interference between different bands while maintaining overall system compactness and multi-band adaptability.
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 FSS effectively mitigates the impact of induced currents, preserving antenna pattern integrity and improving overall system performance across multiple frequency bands.
Implementation Method 1
a frequency selective surface that is disposed so as to at least partially face the conductive reflection plate, that transmits therethrough electromagnetic waves in a first frequency band, that reflects thereon electromagnetic waves in a second frequency band
Implementation Method 2
transmits therethrough electromagnetic waves in a first frequency band
Implementation Method 3
reflects thereon electromagnetic waves in a second frequency band
Implementation Method 4
A multi-band antenna system design incorporating a frequency selective surface (FSS) is introduced between stacked radiating element arrays, with feeding networks electrically connected to the FSS, reducing the impact of induced currents
Data Source
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AI summary
This application provides a multi-band antenna system and abase station, to implement a multi-band architecture layout with good system performance. The multi-band antenna system includes: a plurality of radiating element arrays, feeding networks separately corresponding to the plurality of radiating element arrays, at least one layer of a frequency selective surfaceFSS, and a reflection panel, where the plurality of radiating element arrays are located above the reflection panel, and all or some of the plurality of radiating element arrays are stacked; the at least one layer of the FSS is located between the stacked radiating element arrays; and a feeding network corresponding to at least one radiating element array in the stacked radiating element arrays is electrically connected to the at least one layer of the FSS, or the feeding network corresponding to the at least one radiating element array is integrated on the at least one layer of the FSS.