Shared-Feed Tapered Slot and Folded Dipole Antenna Miniaturization
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Solution Overview
Problem
The challenge is to design a miniaturized MIMO antenna that can support multiple spatial streams while maintaining radiation performance, given the increasing demand for smaller form factors in ONT products.
Innovation Solution
The integration of a tapered slot antenna and a folded dipole antenna, sharing a single feed, allows for miniaturization. The folded dipole forms a resonant tank for the tapered slot antenna, enabling dual-antenna functionality and complementary radiation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of antennas is increased to support more spatial streams, then the radiation performance is improved, but the device size becomes larger
Solution Approach 1:
The patent combines a tapered slot antenna and a folded dipole antenna into a single integrated antenna structure that shares one feed. The tapered slot antenna provides directional radiation for high-gain spatial streams, while the folded dipole provides omnidirectional radiation for other spatial streams. This merging of two antenna types into one physical structure reduces the overall antenna footprint while maintaining support for multiple spatial streams.
Solution Approach 2:
The integrated antenna structure performs multiple functions: the tapered slot antenna component provides directional radiation for high-gain spatial streams, while the folded dipole component provides omnidirectional radiation for other spatial streams. Both antenna types share a common feed structure, making the single antenna unit capable of supporting multiple spatial streams with different radiation patterns, thereby reducing the total number of antennas needed.
2Volume of moving object
If the antenna structure is miniaturized to reduce device size, then the form factor is improved, but the radiation performance may deteriorate
Solution Approach 1:
By merging the tapered slot antenna and folded dipole into a single integrated structure with shared feed, the patent achieves miniaturization without sacrificing radiation performance. The compact integrated design reduces the overall antenna footprint while the complementary radiation patterns of the two antenna types ensure that radiation performance is maintained across different spatial streams.
Solution Approach 2:
The patent applies different antenna structures to different spatial stream requirements: the tapered slot antenna with its directional radiation pattern is used for high-gain spatial streams requiring focused radiation, while the folded dipole with omnidirectional radiation is used for other spatial streams. This local optimization of antenna characteristics within the integrated structure maintains high radiation performance while achieving miniaturization.
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 solution achieves miniaturization while maintaining excellent radiation performance, supporting different frequency ranges for the tapered slot and folded dipole antennas, thus enhancing the application scope of the antenna.
Implementation Method 1
the folded dipole forms a resonant tank of the tapered slot antenna
Data Source
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AI summary
This application provides an antenna, an antenna module, and an electronic device. The antenna includes a tapered slot antenna, a folded dipole, and a feeding structure. The tapered slot antenna includes a first metal structure and a second metal structure that form a tapered slot, and two ends of the tapered slot are a narrow-gap end and a wide-gap end. An extension direction of the folded dipole intersects with an extension direction of the tapered slot. The folded dipole includes a main dipole and a parasitic dipole that are disposed opposite to each other. The main dipole is located between the parasitic dipole and the narrow-gap end. The main dipole includes a first stub electrically connected to the first metal structure and a second stub connected to the second metal structure. An area between the main dipole and the parasitic dipole forms a resonant tank of the tapered slot antenna. The feeding structure is electrically connected between the first stub and the second stub, and feeds the folded dipole and the tapered slot antenna at the same time, to excite the tapered slot antenna that is a directional antenna and excite the folded dipole that is an omnidirectional antenna. This application has an advantage of dual-antenna miniaturization.