Concave Comb-Tooth Reflector Antenna for Multi-Band Directional Radiation
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Solution Overview
Problem
The challenge is to design an antenna that can support multiple frequency bands, including 6G, within the limited space of existing wireless devices without compromising the performance of 2G/5G Wi-Fi, while also reducing antenna size and enhancing radiation efficiency.
Innovation Solution
The design incorporates a reflector with a comb tooth structure that includes a plurality of comb teeth with varying extension lengths, forming a concave profile to increase reflection paths and phase changes, allowing for horizontal omnidirectional and vertical directional radiation, and isolating signals between different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional reflector structure is used, then the antenna can operate on multiple frequency bands, but the radiation performance deteriorates due to limited reflection paths
Solution Approach 1:
The reflector is segmented into multiple comb teeth structures with different extension lengths, creating a multi-level profile. This segmentation increases the number of reflection paths for electromagnetic waves, thereby enhancing radiation performance without requiring a completely new reflector design
Solution Approach 2:
Different portions of the reflector (comb teeth with varying extension lengths) are designed with locally optimized properties to handle different frequency bands. The concave profile created by varying tooth lengths provides localized reflection characteristics that improve overall radiation performance across multiple bands
2Volume of moving object
If the antenna size is reduced to fit existing device spaces, then the product appearance and user habits are satisfied, but the radiation coverage deteriorates
Solution Approach 1:
The reflector design transitions from a two-dimensional planar structure to a three-dimensional multi-level concave profile. This dimensional change allows the antenna system to achieve enhanced radiation coverage within a compact footprint by utilizing vertical space and creating multiple reflection paths in three-dimensional space
3Adaptability or versatility
If more high-performance antennas are integrated into the device, then the N*N MIMO design is achieved, but the mutual impact between antennas increases
Solution Approach 1:
The reflector with comb teeth structures acts as an intermediary element between the antenna and the environment. It mediates the electromagnetic field distribution, providing isolation and reducing mutual interference between multiple antennas in the MIMO system through its multi-path reflection characteristics
4Adaptability or versatility
If the operating frequency band is enlarged to include 6G, then the future-proof design is achieved, but the isolation between frequency bands deteriorates
Solution Approach 1:
The reflector is segmented into comb teeth with different extension lengths, where each segment is optimized for specific frequency ranges. This segmentation creates frequency-selective reflection characteristics that enable multi-band operation while maintaining isolation between bands through spatial separation of reflection paths
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 approach enhances the directional radiation performance, increases the operating frequency band, and maintains high-performance Wi-Fi coverage across different frequencies, ensuring better isolation and efficiency between bands.
Implementation Method 1
Reflection on a reflection path of the first radiating element for the tooth part is greatly enhanced by using the concave part formed by the comb teeth, to enhance directional radiation of the reflector to the first radiating element in the first antenna
Data Source
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AI summary
This application discloses an antenna, including a first antenna and a second antenna. The first antenna includes a first radiating element and a reflector. The reflector is located between the second antenna and the first radiating element. The reflector includes a connection part and a tooth part. The tooth part includes a plurality of comb teeth that are disposed side by side and that extend from the connection part toward the first radiating element. A gap is disposed between the comb teeth. The tooth part includes a profile facing the first radiating element. Each comb tooth includes an end part facing the first radiating element. The profile is formed through connecting all the end parts. The profile includes a concave part that is concave to the connection part. The reflector with the profile concave part formed by the plurality of comb teeth is designed between the second antenna and the first radiating element in the antenna provided in this application. Reflection on a reflection path of the first radiating element is enhanced, to enhance directional radiation performance of the first radiating element. This application further provides an antenna module and a wireless network device.