Vivaldi Antenna Assembly With LEDs for Wideband Omnidirectional Radiation
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Solution Overview
Problem
Designing a wideband and omnidirectional antenna assembly for wireless access points is challenging due to signal reflection and multipath fading in indoor environments, particularly in limited spaces.
Innovation Solution
The proposed antenna assembly incorporates a Vivaldi antenna with a notch region and LED elements, where the first LEDs act as matching elements and the second LEDs function as directors, integrated with a dielectric substrate, enabling operation across a wide frequency band from 600 MHz to 7125 MHz and providing a lighting function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional antenna design is used in limited space, then the device structure is simple, but the operational bandwidth is narrow and omnidirectional radiation cannot be achieved
Solution Approach 1:
The patent combines multiple antenna elements (Vivaldi antenna, first LEDs as matching elements, second LEDs as directors) into a single integrated antenna assembly. This merging of components achieves wideband operation from 600 MHz to 7125 MHz and omnidirectional radiation patterns without requiring separate antenna structures, thereby resolving the contradiction between operational bandwidth and device complexity
Solution Approach 2:
The antenna assembly is designed to perform multiple functions simultaneously: the Vivaldi antenna provides wideband radiation, the first LEDs serve as matching elements for impedance tuning, the second LEDs act as directors for beam shaping, and all LEDs simultaneously provide lighting functionality. This multi-functionality achieves wideband and omnidirectional performance without proportionally increasing structural complexity
2Area of stationary object
If the antenna assembly is made compact for limited space, then the device size is reduced, but the radiation gain and omnidirectional pattern are compromised
Solution Approach 1:
The patent transitions from planar antenna configurations to a three-dimensional structure by placing the first radiation element on one surface of the dielectric substrate and the second radiation element on the opposite surface. This dimensional change enables compact footprint while maintaining adequate element spacing for high radiation gain and omnidirectional patterns
3Adaptability or versatility
If LEDs are added for lighting function, then the device provides dual functionality, but the antenna performance may be degraded due to interference
Solution Approach 1:
The patent assigns different functional roles to different LED groups based on their spatial locations: first LEDs positioned in specific regions serve as matching elements for impedance control, while second LEDs in other regions function as directors for beam shaping. This localized functional differentiation enables the LEDs to enhance rather than degrade antenna performance while providing lighting
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 design enhances the operational bandwidth and radiation gain of the antenna assembly, offering an almost omnidirectional radiation pattern and improved communication quality while integrating a lighting feature, suitable for applications in wireless access points and communication devices.
Implementation Method 1
The antenna assembly includes a Vivaldi antenna... The antenna assembly covers an operational frequency band from 600 MHz to 7125 MHz
Implementation Method 2
The first LEDs are disposed inside the notch region. The first LEDs are used as matching elements of the Vivaldi antenna
Implementation Method 3
The antenna assembly further includes a dielectric substrate. The first radiation element is disposed on the first surface of the dielectric substrate. The second radiation element is disposed on the second surface of the dielectric substrate
Data Source
AI summary
An antenna assembly with a lighting function includes a Vivaldi antenna, a plurality of first LEDs (Light Emitting Diodes), and a plurality of second LEDs. The Vivaldi antenna includes a first radiation element and a second radiation element. A notch region is defined by the first radiation element and the second radiation element. The first LEDs are disposed inside the notch region. The first LEDs are used as matching elements of the Vivaldi antenna. The second LEDs are disposed outside the notch region. The second LEDs are used as directors of the Vivaldi antenna.