Polymer Dielectric Resonator Antenna Fabrication

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Solution Overview

Problem

The widespread use of ceramic-based dielectric resonator antennas (DRAs) is limited by complex and costly fabrication processes, making them unsuitable for high-volume commercial applications, especially at millimeter-wave frequencies where miniaturization and precise manufacturing are challenging due to the hardness and high temperature requirements of ceramic materials.

Innovation Solution

The use of polymer-based materials for fabricating DRAs simplifies the fabrication process through lithographic batch fabrication and 3D printing, allowing for the creation of compact, high-performance antennas with embedded vertical metal structures that can be miniaturized and dynamically adapted for various wireless applications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If ceramic-based materials are used for DRA fabrication, then radiation efficiency is improved, but fabrication complexity and cost increase significantly

Engineering Contradiction:

Improveradiation efficiencyVSAvoidfabrication complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent changes the material parameter from traditional high-permittivity ceramics to polymer-based dielectric materials with lower permittivity. This parameter change enables the DRA to achieve acceptable radiation efficiency while being compatible with low-cost, simple fabrication processes such as lithography and 3D printing, thus resolving the contradiction between radiation efficiency and fabrication complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent adopts polymer-based materials that are inexpensive and easy to process compared to ceramic materials. These materials can be fabricated using standard semiconductor manufacturing techniques, making them economically viable for high-volume commercial applications while maintaining adequate radiation efficiency for the intended applications

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Loss of energy

If ceramic-based materials are used for DRA fabrication, then radiation efficiency is improved, but manufacturing cost increases

Engineering Contradiction:

Improveradiation efficiencyVSAvoidmanufacturing cost

Core Design Contradiction:

Loss of energyVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Loss of energy

If ceramic-based materials are used for DRA fabrication, then radiation efficiency is improved, but manufacturing precision becomes difficult at millimeter-wave frequencies

Engineering Contradiction:

Improveradiation efficiencyVSAvoidmanufacturing precision

Core Design Contradiction:

Loss of energyVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces mechanical machining processes (required for hard ceramics) with lithographic and 3D printing processes. These substitution processes are better suited for achieving precise dimensions at millimeter-wave frequencies, as they can create fine features with higher precision and repeatability compared to diamond tool machining

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Ease of manufacture

If polymer-based materials are used for DRA fabrication, then ease of manufacture is improved, but radiation efficiency may be reduced

Engineering Contradiction:

Improveease of manufactureVSAvoidradiation efficiency

Core Design Contradiction:

Ease of manufactureVSLoss of energy

Solution Approach 1:

The patent optimizes the permittivity parameter of the polymer-based dielectric material to achieve a balance between ease of manufacture and radiation efficiency. By selecting polymer materials with appropriate permittivity values and optimizing the DRA geometry, the patent maintains acceptable radiation efficiency while enjoying the fabrication advantages of polymer materials

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent may employ composite material structures combining polymer-based dielectric materials with metallic embedded elements or coatings. This composite approach allows the structure to benefit from the ease of polymer fabrication while the metallic components enhance the radiation efficiency through improved current distribution and reduced ohmic losses

Inventive Principle:

Principle #40Composite materials

5Loss of energy

If ceramic-based materials are used for DRA fabrication, then radiation efficiency is improved, but adaptability and design flexibility are reduced

Engineering Contradiction:

Improveradiation efficiencyVSAvoiddesign flexibility

Core Design Contradiction:

Loss of energyVSAdaptability or versatility

Solution Approach 1:

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP2737575B1Polymer-based resonator antennas

Publication Date: 2024.05.01 UNIVERSITY OF SASKATCHEWAN

Figure 1A~1B
Figure 2A
Figure 2B

AI summary

Dielectric resonator antennas suitable for use in compact radiofrequency (RF) antennas and devices, and methods of fabrication thereof. Described are dielectric resonator antennas fabricated using polymer-based materials, such as those commonly used in lithographic fabrication of integrated circuits and microsystems. Accordingly, lithographic fabrication techniques can be employed in fabrication. The polymer-based dielectric resonator antennas can be excited using tall metal vertical structures, which are also fabricated using techniques adapted from integrated circuit and microsystems fabrication.