Low-Profile Dielectric Resonator Antenna With Metal Loading for Gain
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Solution Overview
Problem
Conventional dielectric resonator antennas (DRAs) face limitations in gain, particularly those with low profiles, which are often complex to fabricate and have limited antenna gain, typically below 8 dBi, while larger DRAs with enhanced gain require costly fabrication processes.
Innovation Solution
A substrate-integrated dielectric resonator design incorporating metallic patches and vias on a first substrate layer, shorted to ground, with a second substrate layer featuring a microstrip feedline and antenna ground plane, enhancing gain without increasing size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dielectric resonator antenna designs are used, then the antenna structure is simple, but the antenna gain is limited to below 8 dBi
Solution Approach 1:
The patent combines dielectric resonator material with metallic patches and via holes to create a composite structure. The metallic patches are positioned on the top and bottom surfaces of the dielectric resonator, connected through via holes, forming a hybrid dielectric-metal composite that enhances gain while maintaining a compact low-profile structure
Solution Approach 2:
The patent introduces metallic patches on both the top and bottom surfaces of the dielectric resonator, utilizing the third dimension (depth/height) of the structure. This three-dimensional metallic loading configuration modifies the current distribution and resonance characteristics, achieving gain enhancement without significantly increasing the antenna's footprint area
2Volume of moving object
If low-profile dielectric resonator antenna designs are used, then the antenna size is compact, but the fabrication complexity increases
Solution Approach 1:
The patent divides the metallic loading structure into discrete patches positioned at specific locations on the top and bottom surfaces of the dielectric resonator. These segmented metallic patches can be independently fabricated and positioned, simplifying the manufacturing process compared to continuous metallic coatings or complex three-dimensional metallic structures
Solution Approach 2:
The patent optimizes the size, position, and spacing of the metallic patches as design parameters to achieve the desired gain enhancement. By carefully controlling these geometric parameters, the antenna achieves improved performance while maintaining compatibility with standard fabrication processes for dielectric resonators
3Reliability
If larger dielectric resonator antennas are used to enhance gain, then the antenna gain increases, but the antenna size increases
Solution Approach 1:
The integration of metallic patches with the dielectric resonator creates a composite structure that achieves gain enhancement without requiring an increase in the resonator's physical dimensions. The metallic components add electrical complexity rather than physical size, allowing gain improvement within a compact footprint
Solution Approach 2:
The patent utilizes the vertical dimension by placing metallic patches on both the top and bottom surfaces of the dielectric resonator, connected through via holes. This three-dimensional configuration allows the antenna to achieve higher gain without increasing the horizontal footprint area, effectively decoupling gain from planar size
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 peak gain of 9.9 dBi with a low profile of 0.1 λ0, fabricated using low-cost PCB technology, offering a compact and efficient solution for gain enhancement.
Implementation Method 1
A substrate-integrated dielectric resonator design incorporating metallic patches and vias on a first substrate layer, shorted to ground
Implementation Method 2
a second substrate layer featuring a microstrip feedline and antenna ground plane, enhancing gain without increasing size
Data Source
AI summary
A substrate-integrated dielectric resonator, which includes a first substrate layer having a first dielectric constant, and a plurality of metallic patches on a first side of the first substrate layer. The plurality of metallic patches is separated from each other, and is shorted to ground. A dielectric resonator antenna incorporating such a resonator is also described. The DRA has a low profile with an enhanced gain. The DRA can be easily fabricated using low-cost PCB technology. By adding shorted metallic patches to the DR without increasing the antenna size, the gain of DRA is obviously increased.