Offset Feed Via Antenna for Millimeter Wave Loss Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Millimeter wave communications, such as 5G, face challenges due to high-frequency RF signals being easily absorbed and lost during transmission, leading to reduced communication quality, which requires specialized antenna technologies to achieve sufficient gain and effective isotropic radiated power.
Innovation Solution
The antenna apparatus employs a configuration of patch antenna patterns with offset feed vias and feed lines, forming electrical paths that are simplified to reduce transmission loss and improve phase difference, along with side and upper coupling patterns to enhance bandwidth and directivity, arranged in an N×M matrix structure to minimize side lobes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional antenna structures are used for millimeter wave communications, then the antenna can be implemented with standard design, but transmission loss increases and communication quality deteriorates due to high-frequency RF signal absorption
Solution Approach 1:
The antenna apparatus divides the antenna structure into multiple patch antenna patterns arranged in an N×M matrix configuration. Each patch antenna element is individually fed through separate feed vias and feed lines, allowing independent optimization of each element's electrical path to minimize transmission loss while maintaining overall system reliability through distributed architecture.
2Device complexity
If feed vias are positioned at the center of patch antenna patterns, then the electrical connection is simplified, but phase difference increases and gain deteriorates
Solution Approach 1:
The feed vias are intentionally positioned at offset locations rather than at the centers of the patch antenna patterns. This asymmetric positioning creates optimized electrical paths that reduce phase difference between adjacent elements and improve the overall antenna gain, while the feed lines are routed to accommodate these offset positions.
3Device complexity
If feed lines extend in straight directions from feed vias, then the electrical path is simplified, but phase difference increases and directivity deteriorates
Solution Approach 1:
The feed lines are configured with dynamic routing angles rather than fixed straight directions. Each feed line extends from its corresponding feed via at a specific angle optimized to control the phase distribution across the antenna array, enabling precise control of the radiation pattern and directivity while adapting to the offset via positions.
4Device complexity
If patch antenna patterns are arranged without specific configuration, then the antenna structure is simplified, but side lobes increase and radiation efficiency deteriorates
Solution Approach 1:
The patch antenna patterns are arranged in a specific N×M matrix configuration with optimized spacing and positioning. This localized arrangement of elements, combined with the offset feed via positions and angled feed line extensions, creates a radiation pattern with minimized side lobes by controlling the phase and amplitude distribution across the array elements.
Data Source
AI summary
An antenna apparatus includes a plurality of patch antenna patterns, a plurality of first feed vias each electrically connected to a corresponding patch antenna pattern among the plurality of patch antenna patterns, and a plurality of first feed lines each electrically connected to a corresponding first feed via among the plurality of first feed vias. Each of the first feed vias is electrically connected to the corresponding patch antenna pattern at a point offset from a center of the corresponding patch antenna pattern in a first direction. An angle between a direction in which each of at least one of the plurality of first feed lines starts to extend from the corresponding first feed via and a direction in which each of remaining ones of the plurality of first feed lines starts to extend from the corresponding first feed via is not zero degrees and is not 180 degrees.