Reflector Structure for Compact High-Gain Antenna Design
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Solution Overview
Problem
Conventional high gain antennas require increased size and volume to achieve efficient reflection, which is inconvenient for miniaturization efforts in wireless networks, especially with the advent of 5G technology.
Innovation Solution
A reflector structure comprising a metal substrate, first and second flat plates, and a cavity that forms a closed slot, allowing for reduced antenna height and volume while maintaining high gain characteristics by altering the radiation path and impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional additional structures are used to increase reflection efficiency, then antenna gain is improved, but overall volume increases
Solution Approach 1:
The reflector structure is nested within the antenna housing, with the metal substrate forming the rear wall of the housing and the cavity integrated into the housing structure. This nesting allows the reflector to be contained within the existing antenna volume without requiring additional external space, thereby improving reflection efficiency while maintaining compact overall volume.
Solution Approach 2:
The invention transitions from conventional two-dimensional flat reflectors to a three-dimensional cavity structure with controlled volume. By utilizing the vertical dimension and creating a closed or substantially closed cavity with specific height and width dimensions, the reflector achieves enhanced reflection efficiency through volumetric interaction with electromagnetic waves rather than just surface interaction.
2Volume of stationary object
If antenna size is reduced for miniaturization, then overall volume decreases, but high gain characteristics become difficult to achieve
Solution Approach 1:
The invention optimizes specific dimensional parameters of the cavity structure, including cavity height (H), cavity width (W), and the dimensions of the opening (a×b), to achieve resonant conditions that enhance reflection efficiency. By carefully controlling these parameters relative to the operating wavelength, the compact cavity structure achieves high gain characteristics despite the reduced overall antenna volume.
Solution Approach 2:
The reflector structure employs a metal substrate with specific electrical conductivity properties integrated into the antenna housing. The combination of the metal substrate, cavity structure, and opening configuration creates a composite electromagnetic system that achieves enhanced reflection efficiency in a compact form, effectively combining multiple functional elements into an integrated miniaturized structure.
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 a compact antenna design with improved peak gain and impedance matching, reducing the overall volume and height of the antenna while maintaining excellent performance across various frequency bands.
Implementation Method 1
The metal substrate is configured to reflect the radiation of the antenna
Data Source
AI summary
A reflector structure is configured to connect an antenna. The antenna has an excitation source. The reflector structure includes a metal substrate, at least one first flat plate and a second flat plate. The metal substrate is configured to reflect the radiation of the antenna. The at least one first flat plate is disposed on the metal substrate. The second flat plate is floated to the metal substrate along a virtual normal and completely separated from the at least one first flat plate to form a closed slot. A cavity is formed by the metal substrate, the at least one first flat plate and the second flat plate and communicated with the closed slot. The excitation source is projected onto a plane to form an excitation source region. The excitation source region is located in the second flat plate.