Bottom Feed Cavity Aperture Antenna Bandwidth
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Solution Overview
Problem
Conventional antennas lack sufficient bandwidth and polarization purity in wireless signal transmission.
Innovation Solution
A bottom feed cavity aperture antenna design featuring a patch and a ground structure with a continuous wall, where the patch height is less than half the thickness, and a magnetic field is formed at the top end with parallel resonance directions, along with a top sheet that enhances magnetic resonance and electric field formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional antenna design with radiator and ground element on same plane is used, then结构简单性 is maintained, but bandwidth is insufficient
Solution Approach 1:
The patent introduces a third dimension by creating a cavity structure with the ground element extending below the radiator plane. The ground element forms a cavity with height h, transforming the conventional planar two-dimensional structure into a three-dimensional volumetric structure. This dimensional change enables multiple resonant modes and increases bandwidth while maintaining reasonable structural complexity through the systematic design of the cavity and feeding network.
2Adaptability or versatility
If conventional capacitor feed is used, then feeding simplicity is maintained, but polarization purity is insufficient
Solution Approach 1:
The feeding structure is segmented into multiple functional components: the feed network with multiple feeding points, the cavity structure, and the ground element. This segmentation allows each component to be optimized independently for its specific function while contributing to overall polarization purity. The multiple feeding points can be independently controlled to achieve desired polarization characteristics.
Solution Approach 2:
Different regions of the antenna structure are assigned different properties: the cavity height h is optimized for resonant frequency and polarization control, the ground element dimensions are optimized for grounding and polarization purity, and the feeding network is designed with specific impedance characteristics. This local optimization of different structural regions enables high polarization purity while managing overall complexity.
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 design provides a wide bandwidth, stable divergence field, and improved polarization purity, enabling more effective wireless signal transmission.
Implementation Method 1
a magnetic field is formed at the top end, and magnetic resonance directions of the magnetic field are parallel to a first axis
Implementation Method 2
The bottom feed cavity aperture antenna transmits wireless signals via an electric field generated thereby
Data Source
AI summary
A bottom feed cavity aperture antenna is provided. The bottom feed cavity aperture antenna includes a patch and a ground structure. The patch feeds a signal to the bottom feed cavity aperture antenna. The ground structure includes a continuous wall, and a top end and a bottom end, wherein the continuous wall surrounds the patch, a thickness of the ground structure is formed between the top end and the bottom end, a patch height is formed between the patch and the bottom end, and a ratio of the patch height to the thickness is substantially lower than 1/2, and a magnetic field is formed at the top end, and magnetic resonance directions of the magnetic field are parallel to a first axis.