Dual Resonator Flat Panel Antenna Bandwidth Expansion
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Solution Overview
Problem
Flat panel satellite antennas face limitations in dynamic bandwidth due to their reliance on single resonator systems, which restrict their ability to operate effectively across a broad frequency range.
Innovation Solution
The implementation of a dual resonator system with spatially interleaved antenna sub-arrays, each with a frequency offset, allows for expanded dynamic bandwidth by using geometrical and electromagnetic differences in radiative elements, enabling holographic beam steering and increased frequency coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single resonator system is used in flat panel antennas, then the device complexity is reduced, but the dynamic bandwidth is limited
Solution Approach 1:
The antenna system is divided into two spatially interleaved sub-arrays, each functioning as an independent resonator set with different resonant frequencies. This segmentation allows each sub-array to operate at different frequency ranges, thereby expanding the overall dynamic bandwidth of the antenna system while maintaining a relatively simple flat panel structure.
Solution Approach 2:
The patent introduces a spatial dimension by interleaving two sub-arrays in space, where each sub-array is positioned at different locations within the same physical aperture. This spatial arrangement enables frequency diversity without requiring additional physical space, effectively expanding bandwidth through dimensional utilization.
2Adaptability or versatility
If two spatially interleaved antenna sub-arrays are used to expand dynamic bandwidth, then the frequency coverage is improved, but the device complexity increases
Solution Approach 1:
Two separate sub-arrays with different resonant frequencies are merged into a single flat panel antenna structure. The sub-arrays are spatially interleaved and operate simultaneously, with their combined output providing expanded frequency coverage. This merging approach allows the system to achieve broad bandwidth while maintaining a unified antenna structure.
Solution Approach 2:
The flat panel antenna structure is designed to serve multiple frequency ranges simultaneously through the two sub-arrays. Each sub-array can be independently controlled and optimized for specific frequency bands, making the overall system universal in terms of frequency operation and applicable to various communication standards.
3Adaptability or versatility
If geometrical differences are introduced in radiative elements to achieve frequency offset, then the bandwidth is expanded, but the manufacturing precision requirements increase
Solution Approach 1:
Different geometrical configurations are applied to radiative elements in different sub-arrays. Specifically, one sub-array uses elements with one geometrical configuration optimized for lower frequencies, while the other sub-array uses elements with a different geometrical configuration optimized for higher frequencies. This local differentiation of element quality enables frequency offset while keeping the overall manufacturing process manageable.
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
This dual resonator approach significantly enhances the dynamic bandwidth of flat panel antennas, allowing them to operate across a broader frequency range and improve communication capabilities in satellite communications.
Implementation Method 1
at least two spatially interleaved antenna sub-arrays of antenna elements operable as two resonator sets with a frequency offset with respect to each other
Implementation Method 2
The frequency offset between the sub-arrays can be achieved, e.g., by geometrical differences of the radiative antenna elements or differences in electromagnetic loading of the radiative antenna elements
Data Source
AI summary
Dual resonator for flat panel antennas is disclosed. In one example, an antenna comprises a single physical antenna aperture having at least two spatially interleaved antenna sub-arrays of antenna elements operable as two resonator sets with a frequency offset with respect to each other. The antenna sub-arrays are operated together to form a beam in the desired frequency band. Each sub-array has a modulation pattern calculated based on holographic beam steering algorithms. The frequency offset between the sub-arrays can be achieved, e.g., by geometrical differences of the radiative antenna elements or differences in electromagnetic loading of the radiative antenna elements. By using two or dual resonator sets with frequency offset, significant improvement to dynamic bandwidth can be achieved in contrast to a single resonator antenna by expanding the dynamic bandwidth range with dual resonators.