Antenna Spatial Orientation for Wireless Interference Mitigation
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Solution Overview
Problem
The challenge is to maintain antenna performance in small communication devices with high-density mounting of wireless systems whose frequency bands are close to each other, as mutual radio interference often degrades performance.
Innovation Solution
The solution involves a communication device design where a first antenna using a wide frequency band and a second antenna using a narrower frequency band are positioned such that their imaginary surfaces cross, with the second frequency band being included within the range of the first frequency band, and the antennas are separated to minimize interference, allowing for high-density mounting without performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If antennas are mounted at high density in a small communication device, then the device size is reduced, but antenna performance deteriorates due to mutual radio interference
Solution Approach 1:
The patent applies dimensionality change by arranging antennas in three-dimensional space with specific spatial relationships. The first and second antennas are positioned such that imaginary surfaces extending along them cross each other, creating orthogonal or near-orthogonal arrangements that separate the antennas in multiple dimensions rather than simply increasing linear distance, thereby reducing mutual interference while maintaining compact device volume.
2Adaptability or versatility
If different wireless systems with close frequency bands are mounted at high density, then device integration is improved, but radio interference increases and degrades communication quality
Solution Approach 1:
The patent uses spatial separation in multiple dimensions to mitigate frequency interference. By arranging antennas with crossing imaginary surfaces and specific angular relationships, the patent creates physical isolation that reduces coupling between antennas operating at close frequencies, enabling multiple wireless systems to coexist with minimal interference.
Solution Approach 2:
The patent applies local quality by creating distinct spatial zones for different antennas. Each antenna is positioned in a specific location with defined orientation, creating localized electromagnetic field patterns that minimize overlap and interference with adjacent antennas, thereby allowing different wireless systems to operate simultaneously with reduced mutual interference.
Data Source
AI summary
One embodiment is a communication device in which different wireless systems whose frequency bands are close to each other are installed. For a first wireless system, a first antenna using a first frequency band is provided. For a second wireless system, a second antenna using a second frequency band is provided. The first frequency band is set in a range wider than the second frequency band. The second frequency band is included in a part of the range of the first frequency band. An imaginary surface extending along the first antenna and an imaginary surface extending along the second antenna cross each other on their extension lines.