Dielectric Resonator Antenna Matching Substrate LTCC Shrinkage
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Solution Overview
Problem
Dielectric resonator antennas face challenges with process errors, narrow bandwidth, and radiation pattern skewing due to substrate shrinkage and foreign material insertion, particularly in multi-layer substrate processes like LTCC and LCP, which affect antenna efficiency and reliability.
Innovation Solution
A dielectric resonator antenna design that embeds a dielectric resonator body within a multi-layer substrate with a matching substrate featuring via holes, which reduces substrate mode losses and maintains resonance without size adjustments, and prevents changes in antenna characteristics due to foreign materials or surface damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dielectric resonator antenna is used to improve bandwidth and efficiency compared to patch antennas, then antenna performance is improved, but manufacturing complexity increases due to requiring separate dielectric resonator components outside the substrate
Solution Approach 1:
The patent combines the dielectric resonator antenna with the multi-layer substrate by embedding the resonator within the substrate structure itself, eliminating the need for separate resonator components. This merging approach maintains the improved antenna efficiency while significantly reducing manufacturing complexity by integrating everything into a single substrate-based structure.
Solution Approach 2:
The dielectric resonator is nested within the multi-layer substrate structure, with the resonator body embedded in the substrate and the matching substrate layer positioned above it. This nesting approach allows the resonator to be housed within the substrate, simplifying the overall manufacturing process while maintaining antenna performance.
2Reliability
If the size of the dielectric resonator is increased to generate multi-resonance and secure wider bandwidth, then bandwidth is expanded, but the radiation pattern becomes skewed
Solution Approach 1:
The patent uses a multi-layer substrate structure with distinct functional layers (conductor layers, insulating layers, matching substrate layer) to achieve multi-resonance and wider bandwidth without increasing the overall resonator size. Each layer contributes to the resonance characteristics, allowing bandwidth expansion while maintaining a compact structure that preserves the radiation pattern.
Solution Approach 2:
The patent transitions from a single-plane patch antenna to a three-dimensional multi-layer substrate structure with conductor and insulating layers stacked vertically. This dimensional change enables multi-resonance and wider bandwidth achievement without increasing the horizontal size of the resonator, thereby maintaining the radiation pattern integrity.
3Ease of manufacture
If a multi-layer substrate process like LTCC is used to integrate ICs and devices in a single package, then production costs are saved and inductance is reduced, but shrinkage occurs during firing causing process errors
Solution Approach 1:
The patent introduces a matching substrate layer with specific dielectric properties positioned above the dielectric resonator. This layer compensates for the shrinkage effects during the LTCC firing process by adjusting the overall electromagnetic characteristics, thereby maintaining manufacturing precision despite the dimensional changes that occur during processing.
Solution Approach 2:
The patent employs a composite multi-layer substrate structure combining conductor layers, insulating layers, and a matching substrate layer with different dielectric constants. This composite structure provides mechanical stability and electromagnetic performance that compensates for shrinkage during firing, maintaining process accuracy while achieving high integration efficiency.
4Ease of manufacture
If a patch antenna is used in multi-layer substrate environment, then manufacturing is simplified, but bandwidth narrows by 5%
Solution Approach 1:
The patent merges the advantages of both patch antennas and dielectric resonator antennas by creating a substrate-integrated resonator structure. This hybrid approach maintains the manufacturing simplicity of patch antennas embedded in multi-layer substrates while achieving the wider bandwidth characteristics of dielectric resonators through the multi-layer conductor and insulating structure.
Solution Approach 2:
The patent transitions from a two-dimensional patch antenna to a three-dimensional substrate-integrated resonator structure with multiple conductor and insulating layers stacked vertically. This dimensional enhancement enables wider bandwidth operation while maintaining the manufacturing simplicity of integrating the antenna directly into the multi-layer substrate.
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 enhances bandwidth and reduces process errors, improving antenna efficiency and reliability by using a matching substrate with via holes to manage substrate mode effects and maintain consistent radiation patterns.
Implementation Method 1
a dielectric resonator body part 10 embedded in a multi-layer substrate 1... the feeding part 5 including a feeding line 5a... to apply a high-frequency signal to the dielectric resonator
Implementation Method 2
a matching substrate 20 that is stacked on the opening part... capable of preventing loss and change in a radiation pattern due to a substrate mode
Data Source
AI summary
A dielectric resonator antenna is disclosed that includes a multi-layer substrate on which a plurality of insulating layers and conductor layers are alternately stacked. The dielectric resonator antenna also includes a first conductor plate that has an opening part on the upper portion of the top insulating layer of the multi-layer substrate and a second conductor plate that is formed on the lower portion of the bottom insulating layer from the first conductor plate. The insulating layer is formed with at least two stacked layers and is disposed at a position corresponding to the opening part. The dielectric resonator antenna also includes a plurality of first metal via holes, a feeding part and a matching substrate that is stacked on the opening part and is stacked with at least one insulating layer.