Multilayer Loop Antenna Layout for 60 GHz Impedance Matching
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Solution Overview
Problem
Current antenna structures for 60 GHz millimeter wave applications face challenges in impedance matching, radiation pattern, impedance bandwidth, and wide beam width, which affect their performance in applications such as vehicle detection, indoor detection, and industrial environments.
Innovation Solution
A loop antenna design is optimized by varying the length parameter between the center of the grounding via and the conductor, adjusting the bandwidth, center frequency, and bandwidth-to-center-frequency ratio, and incorporating parasitic conductors and a floating conductor to improve impedance matching and radiation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antenna structures are used for 60 GHz millimeter wave applications, then the basic antenna function is achieved, but impedance matching, radiation pattern, impedance bandwidth, and beam width specifications are insufficient
Solution Approach 1:
The antenna structure is divided into multiple segments including a feeding structure with signal input wire and ground wire, a loop structure with multiple conductors across different layers, and a floating conductor. Each segment serves specific functions for impedance matching and radiation pattern control, resolving the contradiction between performance improvement and structural complexity.
Solution Approach 2:
The patent utilizes three-dimensional space by placing conductors on different layers (first dielectric layer, second dielectric layer, ground layer) and using vertical vias to connect them. This multi-layer configuration enables better impedance matching and radiation characteristics without significantly increasing the planar footprint, thus improving performance while controlling complexity.
2Adaptability or versatility
If the length parameter between grounding via and conductor is varied to adjust bandwidth and center frequency, then impedance matching and bandwidth are improved, but the design complexity increases
Solution Approach 1:
The patent systematically varies the length parameter (distance between grounding via center and conductor center) to adjust the antenna's center frequency and bandwidth. By establishing clear relationships between this parameter and performance metrics, the patent enables adaptable frequency tuning while maintaining manageable design complexity through parameterized optimization.
Solution Approach 2:
The antenna design incorporates adjustable parameters that allow dynamic optimization of bandwidth and center frequency. The length parameter can be modified to adapt to different application requirements, enabling the antenna to be tuned for specific frequency bands while maintaining a consistent structural framework.
3Reliability
If parasitic conductors and floating conductor are incorporated to improve radiation pattern and impedance matching, then antenna specifications are enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent combines multiple functional elements including parasitic conductors attached to the loop structure and a floating conductor positioned near the loop. These elements work together to improve radiation pattern and impedance matching. The merging of these components into a integrated multi-layer structure achieves performance enhancement while consolidating manufacturing processes.
Solution Approach 2:
The floating conductor acts as an intermediary element that influences the radiation pattern and impedance characteristics without being directly connected to the feeding structure. This indirect coupling allows for performance optimization while simplifying the manufacturing process compared to direct connections.
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 loop antenna achieves enhanced impedance matching, radiation patterns, and bandwidth, making it suitable for 60 GHz millimeter wave applications, particularly improving the antenna specifications for applications like gesture recognition and building automation.
Implementation Method 1
a loop antenna design is optimized by varying the length parameter between the center of the grounding via and the conductor, adjusting the bandwidth, center frequency, and bandwidth-to-center-frequency ratio
Implementation Method 2
a first dielectric layer having a first upper surface and a first lower surface; a second dielectric layer, having a second upper surface and a second lower surface, and disposed under the first dielectric layer
Data Source
AI summary
A loop antenna which has a signal input/output wire, a first conductor, an upper conductor, an upper conductor, a second conductor, a first lower conductor, and a second lower conductor sequentially connected. The loop antenna further has a first grounding via, and a lower end of the first grounding via is connected to a first grounding layer, and an upper end of the first grounding via is disposed between and connecting the first lower conductor and the second lower conductor, wherein a first end of the second lower conductor is connected to the upper end of the first grounding via, and a second end of the second lower conductor is connected to the first conductor. A second grounding layer and the combination of the signal input/output wire, the first lower conductor, and the second lower conductor are disposed on the same layer disconnectedly.