Metal-Frame Antenna Layout With Gap Feed to Avoid Spatial Interference
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Solution Overview
Problem
Spatial interference occurs between antennas, slits, and feed points in conventional antenna designs for electronic devices, adversely affecting feeding performance.
Innovation Solution
An electronic assembly is designed with at least two antennas formed on a metal frame, featuring a gap between the frame and circuit board and electronic components, and using extension members to connect antennas to feed points, avoiding spatial interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antennas are disposed on a metal frame with slits and feed points on a circuit board, then antenna functionality is achieved, but spatial interference occurs between antennas, slits, and feed points
Solution Approach 1:
The patent introduces a gap dimension between the metal frame and circuit board, allowing feed points to be positioned in the gap rather than directly on the circuit board. This dimensional separation removes feed points from the plane of the metal frame, eliminating spatial interference with antennas and slits while maintaining electrical connection.
Solution Approach 2:
The gap acts as an intermediary space between the metal frame and circuit board, enabling feed points to be positioned in this intermediate region. This intermediary positioning allows electrical connection while physically separating feed points from antenna structures, preventing spatial interference.
2Adaptability or versatility
If multiple antennas are arranged on the metal frame, then antenna coverage is improved, but spatial interference between adjacent antennas and their slits increases
Solution Approach 1:
The patent segments the antenna system into multiple independent antennas with distinct slits on the metal frame. Each antenna is electrically connected through separate feed points positioned in the gap, allowing independent operation and reducing mutual interference while maintaining comprehensive coverage.
Solution Approach 2:
By positioning feed points in the gap dimension rather than on the same plane as the antennas, the patent enables multiple antennas to be arranged on the metal frame without their feed points interfering with each other or the antenna structures, thus improving coverage while minimizing interference.
3Device complexity
If feed points are positioned on the circuit board close to antennas, then electrical connection is simplified, but spatial interference adversely affects feeding
Solution Approach 1:
The gap serves as an intermediary zone where feed points are positioned between the metal frame and circuit board. This intermediary positioning maintains relatively simple electrical connections while physically separating feed points from antennas, thus preserving feeding performance without significantly increasing structural complexity.
Solution Approach 2:
The patent moves feed points from the two-dimensional plane of the circuit board into the three-dimensional gap space. This dimensional relocation allows feed points to remain electrically connected to the circuit board while being physically separated from antennas, maintaining connection simplicity while improving feeding performance.
Data Source
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Figure 2A
AI summary
Embodiments of this application provide an electronic assembly and an electronic device. At least two antennas are formed on a metal frame of the electronic assembly, a circuit board and an electronic component are located on one side of the metal frame, and there is a gap between the metal frame and each of the circuit board and the electronic component. An orthographic projection of the electronic component on the metal frame covers a first antenna, a slit between the first antenna and a second antenna, and a part of the second antenna, and an orthographic projection of the circuit board on the metal frame covers a part of the second antenna. One end of a first extension member is connected to one end that is of the first antenna and that is close to the second antenna, the other end of the first extension member extends into the gap, and is electrically connected to a first feed point on the circuit board. The second antenna is electrically connected to a second feed point on the circuit board. In this way, spatial interference between an antenna, a slit between two adjacent antennas, and a feed point can be avoided.