Electronically Steerable Antenna Array for LLN Range Extenders
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Solution Overview
Problem
Low-Power and Lossy Networks (LLNs) face challenges such as lossy links, low bandwidth, and environmental changes, which traditional range extenders with omnidirectional or dual directional antennas cannot effectively address due to signal splitting, leading to reduced transmission power and sensitivity.
Innovation Solution
A networking device equipped with an electronically steerable directional antenna array, featuring a combination of continuously and selectively enabled antenna elements controlled by circuitry to adjust beam direction, maximizing radio link budget and adapting to changing network conditions without external cables or complex mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional range extenders use omnidirectional or multiple directional antennas, then coverage area is increased, but transmission power and reception sensitivity are reduced due to signal splitting
Solution Approach 1:
The patent implements an electronically steerable antenna array where the beam direction can be dynamically changed without physically moving the antenna. The control circuitry selectively enables different antenna elements based on the desired communication direction, allowing the system to adapt to changing network conditions and target specific neighboring nodes while maintaining concentrated transmission power in the active direction.
2Adaptability or versatility
If more directional antennas are added to serve additional endpoints, then service capability is improved, but transmission power and sensitivity are further reduced due to additional signal splitting
Solution Approach 1:
The system uses a single antenna array with electronically controlled beam steering to serve multiple endpoints sequentially. The control circuitry selects which antenna elements to enable based on the current communication target, allowing the range extender to adapt to different neighboring nodes without physically adding multiple antennas or splitting the signal across them simultaneously.
Solution Approach 2:
The patent combines multiple antenna elements into a single integrated antenna array structure. Instead of using separate physical antennas for different directions, the system merges the functionality into one array where elements are selectively activated, thereby maintaining signal strength while providing multi-directional service capability through electronic beam steering.
3Power
If electronically steerable directional antenna array is used, then transmission power concentration is improved, but device complexity increases
Solution Approach 1:
The antenna array is segmented into multiple discrete elements that can be independently controlled. The control circuitry manages these segmented elements by selectively enabling only the necessary subset for each communication direction, which simplifies the control logic compared to managing a fully active array while still achieving directional beam formation.
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 solution provides higher gain and longer range coverage with reduced power consumption, adaptability to changing conditions, and simplified installation, outperforming traditional antenna configurations in LLNs.
Implementation Method 1
a first plurality of antenna elements coupled to a top or bottom edge of the housing that are continuously enabled, and a second plurality of antenna elements coupled to the top or bottom edge of the housing that are selectively enabled
Data Source
AI summary
In one embodiment, a networking device comprises a first plurality of antenna means, a second plurality of antenna means, and means for controlling the first and second pluralities of antenna means to direct a communication towards a neighbor node of the device.