Metal Middle Frame L-Shaped Slits for Multi-Directional mmWave Radiation
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Solution Overview
Problem
Millimeter-wave modules in mobile terminals with metal middle frames are limited to single-direction radiation due to shielding, failing to meet multi-directional coverage requirements.
Innovation Solution
Incorporating L-shaped slits in the metal middle frame, allowing millimeter-wave antennas to radiate through both slit edges, and arranging multiple L-shaped slits for multi-directional coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal middle frame is used in mobile terminals, then the structural strength and shielding effect are improved, but the millimeter-wave radiation coverage is limited to one direction
Solution Approach 1:
The metal middle frame is segmented by introducing L-shaped slits that divide the continuous metal structure into sections, allowing millimeter-wave signals to pass through the slit edges in multiple directions while maintaining the overall structural integrity and shielding effect of the frame
Solution Approach 2:
The L-shaped slits are positioned at specific locations on the metal middle frame to create localized radiation areas. The slit edges serve as localized millimeter-wave radiation sources, enabling multi-directional coverage while the rest of the metal frame maintains its shielding properties
2Object-affected harmful factors
If the metal middle frame shields millimeter-wave signals, then the shielding effect is improved, but the coverage range is reduced
Solution Approach 1:
L-shaped slits are extracted from the continuous metal middle frame structure, creating openings that allow millimeter-wave signals to pass through. The slit edges serve as radiation sources, enabling the frame to simultaneously provide shielding in certain directions while allowing signal transmission in other directions through the slit regions
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
Enhances millimeter-wave radiation coverage and improves radiation properties by enabling simultaneous radiation in multiple directions, meeting communication requirements.
Implementation Method 1
a millimeter-wave antenna is arranged in the L-shaped slit, and the millimeter-wave antenna is configured to perform millimeter-wave radiation through the first slit edge and the second slit edge of the L-shaped slit
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A frame body of the metal middle frame includes a first side (120,350,450,560) and a second side (130,360,460,550), which are jointed at a side edge (110) of the first side and second side; an L-shaped slit (140) is arranged on the frame body, and includes a first slit edge (141) and a second slit edge (142) which are jointed at an end point of the first slit edge and the second slit edge, the first slit edge is arranged on the first side, and the second slit edge is arranged on the second side; and a millimeter-wave antenna is arranged in the L-shaped slit, and the millimeter-wave antenna is configured to perform millimeter-wave radiation through the first slit edge and the second slit edge.