Circumferential Vivaldi Antenna Array for Wideband Omnidirectional Coverage
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Solution Overview
Problem
Current antennas have narrow coverage bandwidth and poor omnidirectional performance, making them inadequate for the demands of 5G communication and WiFi coverage, and are often large in size due to traditional design limitations.
Innovation Solution
A single-polarized antenna design incorporating a Vivaldi oscillator array and power divider, where Vivaldi oscillator units are uniformly distributed to provide wide frequency coverage and improved omnidirectional radiation, allowing for a compact and ultra-wideband antenna.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional antenna design principles are used, then the antenna structure is simple, but the coverage bandwidth is narrow and omnidirectional performance is poor
Solution Approach 1:
The antenna is divided into multiple Vivaldi oscillator units uniformly distributed in a circumferential direction, with each unit independently fed by a power divider. This segmentation enables wide bandwidth coverage (700-6000 MHz) and improved omnidirectional performance while maintaining a compact form factor through modular architecture.
2Volume of moving object
If the antenna size is reduced for miniaturization, then the device becomes compact, but the omnidirectional performance deteriorates
Solution Approach 1:
The Vivaldi oscillator units are arranged in a circumferential (circular) pattern rather than a linear or planar configuration. This dimensional arrangement in a ring geometry enables compact volume while maintaining omnidirectional radiation characteristics, as the circular distribution provides uniform 360-degree coverage in the horizontal plane.
Solution Approach 2:
Multiple Vivaldi oscillator units are combined in a circumferential array, with their radiation patterns merging to create a unified omnidirectional beam. The power divider combines multiple feed signals to excite all units simultaneously, producing a composite radiation pattern that achieves omnidirectional performance in a compact form.
3Adaptability or versatility
If multiple antennas are deployed to expand bandwidth, then the frequency coverage is improved, but the network installation complexity and resource usage increase
Solution Approach 1:
The antenna is designed as a universal ultra-wideband device covering 700-6000 MHz, which includes multiple communication bands (4G, 5G, WiFi, etc.). This single antenna replaces multiple frequency-specific antennas, simplifying network installation and reducing resource usage while maintaining broad frequency band coverage through its circumferential Vivaldi oscillator array.
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 achieves a wide coverage bandwidth of 700-6000 MHz, enhancing omnidirectional performance and miniaturization, enabling efficient WiFi and mobile communication coverage while reducing network installation difficulties and resource usage.
Implementation Method 1
The Vivaldi oscillator units are uniformly distributed in a circumferential direction of the Vivaldi oscillator array... the Vivaldi oscillator units have the advantages of a wide frequency band and a small size... the Vivaldi oscillator array has a better omnidirectional characteristic
Data Source
AI summary
Provided is a single-polarized antenna. This single-polarized antenna includes a power divider and a Vivaldi oscillator array. The Vivaldi oscillator array includes multiple Vivaldi oscillator units uniformly distributed in a circumferential direction of the Vivaldi oscillator array. The power divider includes multiple output ports in one-to-one correspondence with the multiple Vivaldi oscillator units. The multiple output ports of the power divider are coupled to the multiple Vivaldi oscillator units in a one-to-one correspondence.