Multi-band Radiating Element Using Parasitic Edge Elements
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Solution Overview
Problem
Conventional antennas are designed for single frequency bands, leading to increased manufacturing and installation costs and space requirements when trying to operate in multiple frequency bands, with narrow frequency operation making it difficult to achieve satisfactory characteristics.
Innovation Solution
A multi-band radiating element is designed with high-frequency radiating elements on both sides of a substrate, utilizing parasitic elements on the edges to cover both high and low-frequency bands, reducing the antenna's size and costs by eliminating the need for long radiating elements and integrating parasitic elements with the reflector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate antennas are used for different frequency bands, then each frequency band can be covered, but the size of the entire antenna increases and manufacturing costs increase
Solution Approach 1:
The patent implements a single antenna structure that can operate across multiple frequency bands by using a combination of radiating elements and parasitic elements. The first and second radiating elements handle high-frequency bands while the first and second parasitic elements handle low-frequency bands, allowing one antenna to perform multiple frequency functions simultaneously, eliminating the need for separate antennas for different bands
Solution Approach 2:
The patent utilizes three-dimensional space by placing radiating elements on both the front surface and back surface of the substrate. This vertical dimensionality allows compact arrangement of multiple functional elements without increasing the planar footprint, enabling multi-frequency operation within a small area
2Adaptability or versatility
If separate antennas are used for different frequency bands, then each frequency band can be covered, but manufacturing costs and installation costs increase
Solution Approach 1:
The patent combines multiple antenna functions into a single integrated structure where radiating elements and parasitic elements coexist on one substrate. This merging of high-frequency and low-frequency antenna functions into one unit reduces manufacturing complexity and costs compared to producing and assembling multiple separate antennas
Solution Approach 2:
The single antenna structure provides universal coverage across multiple frequency bands, replacing the need for multiple specialized antennas. This universality simplifies the manufacturing process and reduces both production and installation costs
3Adaptability or versatility
If a long radiating element is used for low-frequency band, then low-frequency operation is achieved, but the antenna size increases
Solution Approach 1:
The patent introduces parasitic elements as intermediaries that enable low-frequency operation without requiring long radiating elements. The parasitic elements, when excited by the radiating elements, resonate at low frequencies and extend the operational bandwidth without increasing the physical length of the main radiating structure
Solution Approach 2:
The patent achieves low-frequency operation in a compact form by utilizing the third dimension (vertical spacing between substrate and reflector) rather than extending the radiating element length in the planar dimension. The parasitic elements leverage the space above and below the substrate to achieve electrical length equivalent to physical length without actually increasing 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 solution enables operation across a wide frequency band, reducing manufacturing and installation costs while maintaining broadband characteristics, and allows for compact antenna design without the need for separate long radiating elements for low-frequency bands.
Implementation Method 1
high-frequency radiating elements that radiate different waves are provided on both sides of a substrate and a low-frequency band can be used through a parasitic element
Data Source
AI summary
The present invention relates to a multi-band radiating element comprising: a first high frequency radiating element formed on the upper surface of a substrate; one or more first low frequency parasitic elements formed on the upper surface of the substrate and formed at a predetermined distance from the first high frequency radiating element in the direction of the outer edge of the substrate; one or more second low frequency parasitic elements formed on the upper surface of the substrate and formed at a predetermined distance from the first high frequency radiating element in the direction of the outer edge of the substrate; a second high frequency radiating element formed on the bottom surface of the substrate; and a reflector formed at a predetermined distance from the bottom surface of the substrate.