Antenna Device Omnidirectional Coverage via Segmented Units
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Solution Overview
Problem
Existing antenna devices face challenges in generating an omnidirectional radiation pattern without dead zones, particularly when used in IoT applications, as they often require placement on ceilings and need to cover both wireless access points and neighboring users, leading to potential damage and aesthetic issues due to their size and directional limitations.
Innovation Solution
The design incorporates two antenna units and a specially shaped metal plate, such as an L-shaped or U-shaped plate, to generate radiation patterns perpendicular to the ground plane, ensuring wide coverage with no dead zones and improved isolation between the antennas, allowing for efficient wireless communication with both ceiling-mounted access points and neighboring users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are disposed in every direction to achieve omnidirectional coverage, then wireless coverage is improved, but device size and complexity increase
Solution Approach 1:
The antenna device is segmented into two antenna units with different orientations (first antenna unit with first polarization, second antenna unit with second polarization). This segmentation allows each unit to handle specific polarization components, achieving omnidirectional coverage through coordinated operation rather than requiring antennas in every possible direction
Solution Approach 2:
The two antenna units are designed to perform multiple functions: they can independently radiate in different polarizations and work together to achieve omnidirectional coverage. The first ground plane and second ground plane also serve dual purposes as both radiating elements and reference planes for impedance matching
2Adaptability or versatility
If antennas are disposed in every direction to achieve complete coverage, then wireless coverage is improved, but aesthetic appearance deteriorates due to mass amount of space occupied
Solution Approach 1:
Instead of distributing antennas in three-dimensional space in every direction, the invention transitions to a two-dimensional planar configuration on the ground plane. The omnidirectional coverage is achieved through the polarization diversity and phase coordination of the two antenna units, eliminating the need for spatial distribution in multiple directions and thus improving aesthetic appearance
3Device complexity
If directional antennas are used to cover specific areas, then device size is reduced, but dead zones are created in coverage
Solution Approach 1:
The two antenna units are designed to operate continuously and simultaneously, radiating electromagnetic waves with different polarizations. Their combined radiation patterns create continuous omnidirectional coverage without dead zones, as the polarization diversity ensures that at least one antenna unit provides effective coverage at any given spatial location
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 configuration achieves an omnidirectional radiation pattern with no dead zones, maintaining a peak gain lower than 6 dBi and reducing isolation between antennas to below 20 dB, enhancing wireless communication efficiency and aesthetics by minimizing device size and interference.
Implementation Method 1
Each of the first antenna unit and the second antenna unit is able to cooperate with the first ground plane and the metal plate respectively to generate radiation pattern which is perpendicular to the first ground plane
Data Source
AI summary
An antenna device includes a first ground plane, a second ground plane, a first antenna unit, a second antenna unit, and a metal plate. The second ground plane is connected to the first ground plane. The first antenna unit is disposed on the second ground plane. The second antenna unit is disposed on the second ground plane. The metal plate and is connected to the second ground plane and the location of the metal plate is arranged corresponding to the first antenna unit and the second antenna unit. Each of the first antenna unit and the second antenna unit is configured to cooperate with the first ground plane and the metal plate to generate a radiation pattern perpendicular to the first ground plane.