Multi-function Modal Antenna Array for Wireless Systems
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Solution Overview
Problem
Current antenna systems for mobile wireless devices and access points face limitations in providing multiple functions such as high directivity, receive diversity, MIMO capabilities, and interference suppression, often only addressing one or two of these requirements effectively, while also struggling with signal nulls in low reception areas.
Innovation Solution
An array of Modal antennas, each capable of generating multiple unique radiation patterns, is configured to form phased arrays, MIMO systems, and receive diversity configurations, with a combining circuit that allows for flexible selection and combination of radiation patterns to enhance directivity, reduce correlation, and steer beams to improve signal-to-interference-plus-noise ratio (SINR) and mitigate nulls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate antenna systems are used to provide phased array, MIMO, receive diversity, and direction finding functions, then functional versatility is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal antenna array system where a single multi-element antenna structure can perform multiple functions including phased array beamforming, MIMO spatial multiplexing, receive diversity, and direction finding. The system uses a common set of antenna elements that can be dynamically configured through signal processing to achieve different operational modes, eliminating the need for separate dedicated antenna systems for each function.
Solution Approach 2:
The patent merges multiple antenna functions into a unified antenna array structure. By combining the antenna elements and shared signal processing resources into a single integrated system, the patent reduces overall device complexity while maintaining the capability to perform phased array, MIMO, receive diversity, and direction finding operations through dynamic configuration of the same physical infrastructure.
2Reliability
If antenna beam width is narrowed to improve directivity and SINR, then signal to interference plus noise ratio is improved, but coverage area decreases
Solution Approach 1:
The patent implements dynamic beamforming capabilities that allow the antenna system to adaptively adjust beam width and direction based on real-time communication conditions. The system can narrow beams to improve SINR for specific target directions while maintaining broader coverage in other directions through multi-beam or sector scanning operations, resolving the trade-off between directivity and coverage area.
Solution Approach 2:
The patent segments the coverage area into multiple directional sectors and uses the antenna array to form separate beams for different sectors. This allows the system to provide narrow, high-SINR beams to specific targets while simultaneously maintaining coverage in other directional segments through parallel or sequential beam operations.
3Reliability
If the number of antenna elements is increased to improve directivity and radiation pattern control, then antenna performance is improved, but device complexity and size increase
Solution Approach 1:
The patent designs a multi-element antenna array where each element serves multiple purposes across different operational modes. The same physical antenna elements are used for phased array beamforming, MIMO spatial multiplexing, receive diversity, and direction finding, maximizing the utility of each individual element and reducing the total number of elements needed compared to having dedicated antennas for each function.
4Adaptability or versatility
If modal antennas with multiple radiation patterns are used, then adaptability and null mitigation are improved, but manufacturing complexity increases
Solution Approach 1:
The patent implements modal antennas capable of dynamically switching between multiple radiation patterns through electronic control of parasitic element configurations. This allows the system to adapt radiation patterns to communication conditions and steer nulls away from interfering signals without requiring physically different antenna structures, maintaining ease of manufacture while achieving high adaptability.
Data Source
AI summary
A multi-function array is described where several communication system functions are realized using the same antenna architecture. An array of antenna elements where each antenna element can generate multiple radiation patterns is described; the multiple radiation patterns from each antenna element provides increased capability and flexibility in generating a phased array, a MIMO antenna system, a receive diversity antenna system, as well as direction finding feature by way of an interferometer function provided by one or multiple elements. The small volume attributes of the antenna elements populating the array lend this technique to mobile wireless devices as well as access points.