Multilayer Multiband Antenna Layout Without Coaxial Feed
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Solution Overview
Problem
Existing multiband antenna apparatuses with simple configurations are not adequately discussed, particularly in relation to the use of coaxial cables for power supply, which complicates their design.
Innovation Solution
The proposed antenna apparatus employs a multilayer board configuration with a patch antenna element for a high frequency band and a monopole antenna element for a low frequency band, utilizing hairpin filters to allow high-frequency signals to pass through while blocking low-frequency signals, eliminating the need for coaxial cables and simplifying the configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multiband antenna apparatus uses coaxial cables for power supply, then the power transmission is reliable, but the device complexity increases
Solution Approach 1:
The patent extracts and eliminates the coaxial cable from the antenna apparatus configuration. By using separate feeder lines for each antenna element connected to the ground board, the design removes the need for complex coaxial cable assemblies while maintaining power transmission functionality through simplified transmission paths.
Solution Approach 2:
The patent segments the power supply system by providing separate feeder lines for each antenna element (first and second antenna elements) instead of using a single coaxial cable. This segmentation allows independent connection of each antenna element to the ground board, simplifying the overall configuration while ensuring reliable power transmission to each element.
2Adaptability or versatility
If multiple antenna elements for different frequency bands are integrated, then the multiband functionality is achieved, but the device complexity increases
Solution Approach 1:
The ground board serves as a universal reference plane for multiple antenna elements operating at different frequency bands. By using the same ground board for both the first and second antenna elements, the design achieves multiband functionality without requiring separate ground structures, thereby simplifying the overall apparatus configuration.
Solution Approach 2:
The patent merges multiple antenna elements (first antenna element for first frequency band, second antenna element for second frequency band) into a single integrated structure with shared ground board and feeder line connections. This consolidation achieves multiband operation while reducing the number of separate components compared to traditional multi-antenna designs.
3Object-affected harmful factors
If a filter is added to block signals between frequency bands, then the signal interference is reduced, but the device complexity increases
Solution Approach 1:
The filter acts as an intermediary component between the second antenna element and the ground board. It selectively blocks signals of the second frequency band while allowing first frequency band signals to pass through, thereby reducing inter-band interference without requiring complex isolation structures or additional shielding.
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
This design enables a multiband antenna apparatus with a simplified configuration, reducing the influence of user interference and allowing for efficient signal transmission and reception across multiple frequency bands without the complexity of coaxial cables.
Implementation Method 1
a filter connecting between the second antenna element and the ground board, allowing a signal of the first frequency band to pass through the filter, and blocking a signal of the second frequency band
Data Source
AI summary
The present invention provides an antenna device having a simple configuration for multiband operation. The antenna device is provided with: a first antenna element which is provided in a first layer of a multi-layer substrate and has a first frequency band; a second antenna element which is provided in a second layer of the multi-layer substrate different from the first layer, and has a second frequency band lower than the first frequency band; a ground substrate; a first feeding line path extending from the first antenna element toward the ground substrate; a second feeding line path extending from the second antenna element toward the ground substrate; and a filter connecting the second antenna element and the around substrate, the filter passing a signal of the first frequency band and blocking a signal of the second frequency band.