Patch Antenna Array Dielectric Tuning for Wider Bandwidth
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Solution Overview
Problem
Designing and manufacturing patch antenna structures with a tunable and relatively large bandwidth remains a non-trivial challenge.
Innovation Solution
The antenna assembly includes a dual polarized, aperture fed, patch antenna array where the effective dielectric constant of the dielectric materials is controlled by forming features such as holes, introducing air bubbles, or doping with dopants within the dielectric materials to alter the dielectric constant, thereby tuning the frequency spectrum and bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dielectric material is used in patch antenna structures, then bandwidth is improved, but mechanical stability deteriorates
Solution Approach 1:
The patent applies porous dielectric materials containing air bubbles or voids within the patch antenna structure. The porous structure reduces the effective dielectric constant, enabling bandwidth tuning while the material maintains sufficient mechanical integrity. The air bubbles are distributed throughout the dielectric material to achieve the desired electromagnetic performance without compromising structural stability.
Solution Approach 2:
The patent uses composite dielectric materials that combine solid dielectric matrix with air bubble inclusions. This composite structure allows independent optimization of electromagnetic properties (through bubble size, shape, and distribution) and mechanical properties (through the solid matrix), resolving the contradiction between bandwidth enhancement and mechanical stability.
2Adaptability or versatility
If holes are formed in dielectric material to tune dielectric constant, then bandwidth is improved, but structural integrity deteriorates
Solution Approach 1:
Instead of forming large holes that compromise structural integrity, the patent uses a porous material approach where numerous small air bubbles are distributed throughout the dielectric. This creates a foam-like structure that maintains mechanical strength while effectively reducing the dielectric constant for bandwidth tuning.
Solution Approach 2:
The patent tunes the dielectric constant by controlling parameters of the porous structure (bubble size, density, and distribution) rather than creating discrete holes. This continuous parameter adjustment allows optimization of both electromagnetic performance and mechanical strength simultaneously.
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 allows for a larger bandwidth of the antenna array by adjusting the dielectric constant, enabling scalable frequency operation while maintaining mechanical stability.
Implementation Method 1
dielectric materials with controlled effective dielectric constants through features like holes, air bubbles, or dopants allows for a tunable bandwidth
Data Source
AI summary
An antenna assembly includes a ground plane including conductive material, and a dielectric material above the ground plane. A patch antenna is on the dielectric material. In an example, a plurality of features extends from an upper surface or a lower surface of the dielectric material and within the dielectric material, wherein the plurality of features comprises voids filled with gas or are vacuum. Additionally, or alternatively, the dielectric material is doped with a dopant. In an example, the antenna assembly further includes a first aperture and a second aperture on the ground plane and below the patch antenna, and another dielectric material below the first and second apertures. In some such cases, a first feed line is below the first aperture, and a second feed line is below the second aperture.