Metal Frame Antenna T-Slot Structure for Compact 5G Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G wireless electronic communications devices, the increased number of antennas leads to reduced isolation and radiation efficiency, degrading the envelope correlation coefficient and channel capacity, which affects user experience and product competitiveness.
Innovation Solution
A T-shaped slot structure is introduced between antennas on a metal frame to prevent current flow, improving isolation and reducing mutual impact, while maintaining the device's size and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of antennas is increased to support higher-order MIMO for higher data transmission rates, then the channel capacity and system throughput are improved, but the isolation between antennas deteriorates and radiation efficiency is reduced
Solution Approach 1:
The patent divides the continuous floor structure into segmented regions by introducing slot structures between adjacent antennas. These slots act as current barriers that segment the floor current paths, preventing current flow from one antenna port to another. This segmentation approach allows multiple antennas to be closely spaced while maintaining isolation, thus supporting higher-order MIMO configurations without compromising antenna performance
Solution Approach 2:
The patent introduces slot structures as intermediary elements between adjacent antennas. These slots serve as mediators that block floor current flow between antenna ports while maintaining the overall structural integrity of the floor. The slots are strategically positioned to interrupt current paths without requiring significant increases in antenna spacing, enabling improved isolation in compact antenna arrays
2Reliability
If the spatial distance between two antennas is increased to reduce isolation degradation, then the antenna isolation is improved, but the overall size of the wireless electronic communications device is increased
Solution Approach 1:
The patent extracts the current-blocking function from the floor structure itself by introducing dedicated slot structures between antennas. Instead of relying on increased spacing to achieve isolation, the slots are extracted as specific current-interruption elements that actively prevent floor current flow. This allows antennas to be positioned closer together while maintaining isolation through the extracted slot barriers
Solution Approach 2:
The slot structures serve as intermediary elements that enable close antenna spacing by mediating the electromagnetic interaction between adjacent antennas. The slots block direct current coupling through the floor while allowing antennas to maintain minimal spacing, thus achieving isolation improvement without increasing overall device volume
3Reliability
If a slot is made on the floor structure to prevent floor current flow between antenna ports, then the isolation between antennas is improved, but the integrity of the floor structure is damaged
Solution Approach 1:
The patent applies local quality modification by introducing slots only in specific regions where floor currents flow between antenna ports, rather than compromising the entire floor structure. The slots are strategically positioned at current concentration areas between adjacent antennas, maintaining floor integrity in other regions while achieving isolation improvement locally where needed
Solution Approach 2:
The slot structures segment the floor current paths without completely compromising floor structure integrity. By creating controlled interruptions only in critical current flow regions, the slots prevent harmful current coupling while maintaining the overall structural strength and continuity of the floor in non-critical areas
4Reliability
If a metal line or microstrip line is connected between antenna radiators to improve isolation through current counteraction, then the isolation of narrow-band antennas is improved, but the effect is unobvious for multi-frequency or wide-frequency antennas
Solution Approach 1:
The patent replaces the electrical current-counteraction mechanism (metal line/microstrip line) with a physical barrier mechanism (slot structure). Instead of using conductive elements to create opposing currents, the slots provide a physical interruption of floor current paths. This mechanical/substructural approach is frequency-agnostic and effective across wide frequency ranges and multiple frequency bands, unlike the narrow-band optimized electrical counteraction method
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
The solution significantly enhances the isolation between antennas, improving the channel capacity and transmission rate, thereby ensuring better wireless communication experience and product competitiveness without increasing the device's size.
Implementation Method 1
a slot structure for improving isolation between the two antennas is disposed between the two antennas, to prevent current flow between the two antennas
Data Source
Figure 1
Figure 2
Figure 3
AI summary
This application provides a wireless electronic communications device, including: a metal frame on which a first antenna and a second antenna are disposed, wherein a first preset distance is spaced between the first antenna and the second antenna, and a feeding structure is disposed on each of the first antenna and the second antenna; and a slot structure disposed between the first antenna and the second antenna, where an extension distance of the slot structure in a width direction of the metal frame is less than a width of the metal frame.