Substrate-Integrated Dielectric Resonator Antenna for Wideband PCB Layouts
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Solution Overview
Problem
Existing low-profile dielectric resonator antennas face challenges in achieving wide bandwidth and stable radiation patterns while being compact and manufacturing-friendly, often requiring high dielectric constant materials not suitable for standard PCB technology, leading to increased complexity and cost.
Innovation Solution
A substrate-integrated dielectric resonator design using a first substrate layer with a first dielectric constant and a plurality of vias, where the vias are filled with dielectric materials of different constants, arranged in a lattice or random manner to control resonator modes and achieve wide impedance bandwidth without external high dielectric constant materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If high dielectric constant materials are used to achieve compact size, then the antenna footprint is reduced, but the fabrication cost increases and compatibility with standard PCB processes is lost
Solution Approach 1:
The patent uses a composite structure combining standard PCB substrate material with embedded dielectric resonator elements. The dielectric resonator is formed by depositing dielectric material through PCB via holes and filling with high dielectric constant material, creating a composite structure that maintains standard PCB fabrication compatibility while achieving the compactness benefits of high dielectric constant materials
Solution Approach 2:
The dielectric resonator elements are nested within the standard PCB substrate structure. The resonator material is deposited into and fills the via holes of the PCB substrate, creating a nested configuration where the high-performance dielectric elements are embedded within the conventional PCB architecture, enabling compactness without sacrificing manufacturability
2Ease of manufacture
If low dielectric constant materials are used for standard PCB fabrication, then manufacturing compatibility is maintained, but the antenna lateral extent increases
Solution Approach 1:
The patent changes the effective dielectric constant parameter of the antenna structure by embedding high dielectric constant material within the PCB substrate. This allows the antenna to achieve the compact dimensions associated with high dielectric constant materials while the overall structure remains compatible with standard PCB fabrication processes
Solution Approach 2:
The patent applies local quality by concentrating the high dielectric constant material specifically in the resonator regions (via holes) rather than throughout the entire PCB substrate. This localized application of high dielectric constant material provides the necessary field confinement for compact antenna dimensions while maintaining standard PCB substrate properties for manufacturing compatibility
3Adaptability or versatility
If wideband techniques are applied to achieve large bandwidth, then impedance bandwidth increases, but radiation pattern stability deteriorates
Solution Approach 1:
The patent segments the dielectric resonator into multiple discrete elements distributed across the PCB substrate. This segmentation into multiple resonator elements allows for broader impedance bandwidth while maintaining stable radiation patterns through the distributed configuration, as each segment contributes to the overall bandwidth without causing pattern degradation
4Reliability
If dual polarized designs are implemented, then communication link stability improves, but additional circuitry and manufacturing complexity are required
Solution Approach 1:
The patent merges the dual polarization functionality directly into the dielectric resonator structure itself, rather than requiring separate antenna elements and additional circuitry. The resonator elements are configured to naturally support both polarizations, eliminating the need for baluns, phase shifters, and power dividers that would otherwise be required
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 achieves a compact, low-profile antenna with a wide impedance bandwidth of 47.5%, suitable for standard PCB manufacturing, and eliminates the need for additional circuitry in dual-polarized designs, providing stable radiation performance and easy integration into portable devices.
Implementation Method 1
substrate-integrated dielectric resonator design using a first substrate layer with a first dielectric constant and a plurality of vias, where the vias are filled with dielectric materials of different constants, arranged in a lattice or random manner to control resonator modes
Data Source
AI summary
A substrate-integrated dielectric resonator contains a substrate layer with a first dielectric constant, a plurality of dielectric vias, and a plurality of second vias. Each dielectric via includes a first via-hole extending through the substrate layer, and a dielectric material with a second dielectric constant contained within the first via-hole. Each second via has a second via-hole extending through the substrate layer and filled with gas. A dielectric resonator antenna containing a substrate-integrated dielectric resonator and a method of fabricating the same is also disclosed. By skillfully arranging second vias inside the DRA, the resonant frequencies of different modes can be controlled, and a wide impedance band-width with stable radiation performance can be achieved.