Multi-Beam RF Antenna Feed Design for Compact MIMO Isolation
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Solution Overview
Problem
Current MIMO antenna systems face challenges in providing reliable high-speed data transmission with limited bandwidth and power, particularly in remote and underserved regions, due to interference between multiple antennas and the need for larger, more expensive setups, which is exacerbated by the difficulty in achieving sufficient isolation between closely spaced antennas.
Innovation Solution
The development of multi-focal-point antenna devices with a single emitter capable of transmitting multiple independent beams using a patterned antenna radiating emitter with separate and isolated input feeds, which are differently polarized and directed using dual reflectors to minimize interference and optimize beam directionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple separate antennas are used for MIMO operation, then data transmission capacity is improved, but device size and cost increase
Solution Approach 1:
The patent combines multiple antenna functions into a single integrated antenna structure. The antenna includes a single radiating element with multiple feed points that can simultaneously support multiple independent data streams for MIMO operation, eliminating the need for multiple separate antennas while maintaining data transmission capacity.
Solution Approach 2:
The single antenna is designed to perform multiple functions simultaneously - it can handle multiple input multiple output (MIMO) data streams through its multiple feed points, providing both spatial diversity and multiplexing capabilities within a single antenna structure, thus achieving multi-functionality without increasing footprint.
2Productivity
If multiple separate antennas are used for MIMO operation, then data transmission capacity is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple antenna functions into a single integrated structure with multiple feed points. This reduces the number of components that need to be manufactured, assembled, and tested, thereby lowering manufacturing costs while maintaining the ability to transmit multiple data streams simultaneously for high-capacity MIMO operation.
3Area of stationary object
If multiple antennas are closely spaced, then footprint is reduced, but interference between antennas increases
Solution Approach 1:
The patent segments the single antenna into multiple independently fed radiating regions or feed points. Each feed point can be independently controlled and optimized, allowing the antenna to generate multiple orthogonal or independently polarized beams that minimize mutual interference while maintaining a compact footprint.
Solution Approach 2:
The antenna structure incorporates different local characteristics at different feed points or radiating regions, such as different polarizations or phase distributions. This allows each region to be optimized for specific functions while working together as a unified structure, reducing interference between different data streams.
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 solution enables efficient, reliable, and cost-effective high-speed data transmission in remote areas by allowing a single antenna to operate as multiple independent antennas, reducing interference and maintaining compact size, thus addressing the limitations of traditional MIMO systems.
Implementation Method 1
a primary reflector having a concave reflecting surface configured to direct electromagnetic energy waves; a secondary reflector within the primary reflector having a convex reflecting surface configured to direct electromagnetic energy waves toward the primary reflector
Data Source
AI summary
Antenna assemblies are described herein. In particular, described herein are multi-focal-point antenna devices and compact radio frequency (RF) antenna devices. Any of these assemblies may include a primary feed that includes a single patterned emitting surface from which multiple different beams of RF signals are emitted corresponding to different antenna input feeds each communicating with the patterned antenna emitting surface. The antenna assembly is therefore capable of emitting beams in the same direction having different polarizations using a single primary feed.