Asymmetric Radiative Element Antenna for Signal Diversity
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Solution Overview
Problem
Current wireless communication antennas face limitations in signal reception and transmission due to topographical changes and obstructions, leading to off-axis signal reception and multi-path cancellations, particularly in obstructed environments, where existing technologies fail to optimize signal capture across diverse polarizations and frequencies.
Innovation Solution
A multi-polarized antenna assembly with radiative elements of varying lengths and orientations, lacking two-fold rotational symmetry, is designed to enhance frequency band sensitivity by increasing the distance between radiative elements and a conductive ground reference, allowing for improved spatial and polarization diversity, thereby stabilizing signal throughput and minimizing packet retries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antennas are used in obstructed environments, then signal reception is limited by topographical changes and obstructions, but increasing antenna gain and using circuitry solutions have proven to have significant limitations
Solution Approach 1:
The radiative element is configured to lack two-fold rotational symmetry around a first axis coinciding with the antenna feed, creating an asymmetric structure that enhances sensitivity to multiple polarizations and frequencies while improving signal capture in obstructed environments
Solution Approach 2:
The radiative element extends such that the distance between the radiative element and the electrically conductive ground reference increases as a radial distance from the first axis along the radiative element increases, introducing a dimensional variation that enables enhanced adaptability to diverse signal conditions
2Reliability
If antenna gain is increased to overcome obstructions, then signal capture improves, but the complexity of the antenna structure and circuitry increases
Solution Approach 1:
The patent modifies the geometric parameters of the radiative element, specifically its asymmetric configuration and the varying distance from the ground reference, to achieve enhanced signal reception and multi-polarization capability without adding complex circuitry or multiple antenna elements
3Adaptability or versatility
If the radiative element is positioned closer to the ground reference, then the antenna structure remains compact, but frequency band sensitivity and polarization diversity are reduced
Solution Approach 1:
The radiative element is designed with a varying distance profile from the ground reference, where the distance increases radially from the first axis, creating a three-dimensional configuration that enhances frequency band sensitivity and polarization diversity while maintaining a compact overall footprint
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 antenna assembly achieves enhanced signal reception and transmission across a wide range of frequencies by capturing preferred signal paths and polarizations, reducing null spots and improving connectivity in dynamic environments, while maintaining a compact size and complexity.
Implementation Method 1
an antenna assembly for receiving and transmitting radio frequency signals
Data Source
AI summary
Antenna assemblies are provided for receiving and transmitting radio frequency signals over an enhanced frequency band. An assembly includes an electrically conductive ground reference and a radiative element formed from an electrically conductive material and comprising an apex. The radiative element is electrically connected to an antenna feed at the apex and configured such that the radiative element lacks two-fold rotational symmetry around a first axis coinciding with the antenna feed. The radiative element extends such that a distance between the radiative element and the electrically conductive ground reference increases as a radial distance from the first axis along the radiative element increases.