Multi-filtenna System Port Isolation and ECC Reduction
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Solution Overview
Problem
Existing multi-mode antenna systems face challenges in maintaining adequate port isolation, low envelope correlation coefficient (ECC), low insertion loss, and similar radiation patterns for each antenna element while requiring a substantial number of band pass filters, which complicates the design and efficiency.
Innovation Solution
A multi-filtenna system is developed that integrates antenna and filter elements in a compact design, featuring resonator sections with waveguide cavities and a radiating resonator, where the resonator sections are stacked and configured to operate at the same frequency, with a ground wall element and antenna element aligned with the radiating resonator, to achieve efficient multi-channel beam forming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antenna elements with half wavelength spacing are provided, then the capacity and bandwidth of the antenna array are increased, but the number of required band pass filters increases substantially, complicating the design
Solution Approach 1:
The patent combines multiple antenna elements and their associated band pass filters into a single integrated antenna array structure. The filters are positioned in close proximity to their respective antenna elements, allowing the entire assembly to function as a unified multi-channel beam forming system, thereby reducing the overall complexity compared to separate discrete components
Solution Approach 2:
The antenna array is designed to provide multiple functions simultaneously: it enables multi-channel beam forming, supports dual polarization for independent channels, and maintains port isolation all within a single integrated structure, eliminating the need for separate filter assemblies for each antenna element
2Adaptability or versatility
If multiple antenna elements with half wavelength spacing are provided, then multi-channel beam forming capability is enhanced, but maintaining adequate port isolation and low envelope correlation coefficient becomes challenging
Solution Approach 1:
The patent applies different polarization orientations to different antenna elements within the array. Specifically, adjacent antenna elements are oriented with orthogonal polarizations, which creates local variations in the radiation patterns and electromagnetic field distributions, thereby improving port isolation and reducing envelope correlation coefficients while maintaining multi-channel beam forming capability
3Reliability
If multiple band pass filters are provided for each antenna element, then signal filtering is improved, but insertion loss increases and efficiency decreases
Solution Approach 1:
The patent positions the band pass filters in close proximity to their corresponding antenna elements, allowing for optimized coupling and signal transfer. This integrated arrangement minimizes transmission line losses and improves the overall efficiency of the system compared to having filters located remotely from the antenna elements
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 multi-filtenna system provides improved performance with adequate port isolation, low ECC, and high efficiency, enabling effective multi-channel beam forming while reducing the number of required filters and maintaining a consistent radiation pattern.
Implementation Method 1
An antenna in a transmitting configuration transforms electronic signals, such as the electronic signals received from a radio, into electromagnetic signals for propagation through the air. Conversely, an antenna in a receiving configuration receives electromagnetic waves from the air and transforms the electromagnetic waves into electronic signals
Implementation Method 2
A band pass filter is generally required to be disposed in series with an antenna to permit only desired signal frequencies to pass therethrough
Implementation Method 3
A multi-filtenna system is developed that integrates antenna and filter elements in a compact design, featuring resonator sections with waveguide cavities and a radiating resonator, where the resonator sections are stacked and configured to operate at the same frequency
Data Source
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AI summary
A multi-filtenna system is provided that effectively combines an antenna element and a filter element in a compact design while concurrently providing adequate port isolation, a low ECC, a low insertion loss (and a corresponding high efficiency) and a similar radiation pattern for each antenna element in order to allow for multi-channel beam forming. A multi-filtenna system includes a plurality of filtennas disposed in parallel proximate one another. Each filtenna includes a port, one or more resonator sections coupled to one another and a radiating resonator. The one or more resonator sections are disposed between the port and the radiating resonator. Each of the plurality of filtennas are configured to communicate via the port and to operate at the same frequency.