Wireless Module Slot Antenna Perpendicular Radiation
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Solution Overview
Problem
The design flexibility of wireless modules is limited by the need for a wiring prohibited region to enhance antenna radiation efficiency, which restricts product downsizing and component placement on printed circuit boards.
Innovation Solution
A wireless module design that includes a board with multiple conductor patterns and vias, a conductive film, and a slot antenna configuration, where the conductive film covers the insulator and connects to the conductor patterns, reducing the area influenced by the antenna and allowing for smaller wiring prohibited regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wiring prohibited region is set to enhance antenna radiation efficiency, then radiation efficiency is improved, but design flexibility decreases
Solution Approach 1:
The patent transitions the antenna radiation pattern from a conventional downward direction to a perpendicular (sideways) direction. This dimensional change in radiation direction allows the antenna to operate effectively without requiring a large wiring prohibited region on the printed circuit board, thereby maintaining design flexibility while preserving radiation efficiency
Solution Approach 2:
The patent employs a ground electrode pattern with specific local characteristics - a continuous ground electrode on one side and a discontinuous ground electrode on the other side. This local quality differentiation in the ground electrode structure enables the antenna to achieve perpendicular radiation with reduced interference to surrounding circuitry, minimizing the required wiring prohibited region
2Reliability
If a wiring prohibited region is set to enhance antenna radiation efficiency, then radiation efficiency is improved, but product size increases
Solution Approach 1:
By changing the radiation direction from downward to perpendicular, the patent eliminates the need for a large wiring prohibited region that would otherwise be required to prevent interference with downward-radiating antennas. This allows product components to be placed more compactly, reducing overall product size while maintaining radiation efficiency
Solution Approach 2:
The ground electrode is segmented into continuous and discontinuous portions, which creates a radiation pattern that is confined to specific directions. This segmentation allows the antenna to radiate perpendicular to the board without requiring a large excluded area, enabling more compact product layouts
3Area of stationary object
If electronic components are placed on the opposite surface to downsize the product, then product size decreases, but antenna performance deteriorates
Solution Approach 1:
The patent changes the antenna's radiation direction from downward (perpendicular to the board surface) to sideways (parallel to the board surface). This dimensional change allows electronic components to be placed on the opposite surface of the printed circuit board without interfering with the antenna's radiation pattern, enabling product downsizing while maintaining antenna performance
Solution Approach 2:
The specific ground electrode pattern acts as an intermediary structure that shapes the electromagnetic field to radiate perpendicular to the board. This intermediary ground structure enables coexistence of the antenna and components on the opposite surface by directing energy away from the board interior where components are located
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 reduces the wiring prohibited region, enhances design flexibility, and allows for more compact product layouts by minimizing downward electromagnetic radiation and maximizing perpendicular radiation, thus enabling better component placement and reduced module size.
Implementation Method 1
a slot antenna configuration, where the conductive film covers the insulator and connects to the conductor patterns, reducing the area influenced by the antenna and allowing for smaller wiring prohibited regions
Data Source
AI summary
The wireless module according to an aspect of the present invention includes a board, a wireless communication chip that at least transmits or receives a high-frequency signal, an insulator, a conductive film, a feed line, first to third conductor patterns, and first and second vias. The chip, the feed line, and the first and second patterns are located on a first wiring layer of the board. The third pattern is at a ground potential and is located on a second wiring layer of the board. The insulator encapsulates the chip. The film covers at least a part of a side surface of the insulator. The feed line electrically connects the chip and the film. The first and second patterns are in contact with the film. The first via connects the first pattern and the third pattern. The second via electrically connects the second pattern and the third pattern.