Arc-Slotted Microstrip Antenna for Wideband 5G Miniaturization
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Solution Overview
Problem
Microstrip antennas face limitations in 5G low frequency mobile communication due to narrow bandwidth and large size, hindering their application in 5G low frequency band communication.
Innovation Solution
A microstrip antenna design featuring a dielectric layer with arc-shaped slots and radiation elements, connected by microstrip lines, and a feeding structure with mirror symmetry, enabling wide bandwidth and miniaturization through a power equal-division feeding mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a microstrip antenna is used for 5G low frequency mobile communication, then the structure is simple and high gain can be realized, but the bandwidth is narrow and the antenna size is large
Solution Approach 1:
The reference electrode layer is divided into multiple segments by introducing arc-shaped slots, which subdivides the continuous ground structure into discrete regions. This segmentation modifies the current distribution and resonant characteristics, enabling bandwidth expansion while preserving the microstrip antenna's inherent structural simplicity and ease of manufacture.
Solution Approach 2:
The patent modifies the electrical parameters of the antenna by introducing arc-shaped slots with specific geometric parameters (radius, arc angle, position) into the reference electrode layer. These parameter changes alter the effective electrical length and capacitance distribution, thereby expanding the operating bandwidth without significantly complicating the overall structure.
2Ease of manufacture
If a microstrip antenna is used for 5G low frequency mobile communication, then the structure is simple and high gain can be realized, but the antenna size is large
Solution Approach 1:
By segmenting the reference electrode layer through arc-shaped slots, the patent creates multiple resonant regions within a compact footprint. This allows the antenna to achieve the required electrical performance at lower frequencies without proportionally increasing the physical area, thus reducing the overall antenna size while maintaining structural simplicity.
Solution Approach 2:
The arc-shaped slots are nested within the reference electrode layer in a space-efficient manner, allowing multiple functional regions to be packed into a smaller overall area. This nesting approach enables the antenna to achieve low-frequency operation with reduced physical dimensions while keeping the structure simple and manufacturable.
3Adaptability or versatility
If arc-shaped slots are introduced in the reference electrode layer, then the bandwidth is expanded, but the structure becomes more complex
Solution Approach 1:
The patent uses arc-shaped slots with curved geometry instead of straight or angular cuts. This curvature provides smooth transitions that maintain uniform current distribution and reduce edge effects, achieving bandwidth expansion with minimal increase in structural complexity. The curved shape is also easier to manufacture using standard PCB fabrication processes compared to complex angular patterns.
Solution Approach 2:
By carefully optimizing the geometric parameters of the arc-shaped slots (radius, arc angle, distance from center, width), the patent achieves significant bandwidth expansion with minimal structural modification. The parameter optimization ensures that the slots provide the necessary electrical performance while maintaining compatibility with standard manufacturing processes, thus limiting the increase in device complexity.
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 antenna achieves a wide bandwidth of 1.34 GHz (3.16 GHz to 4.5 GHz) with a gain of 10.59 dBi and a size of 132.8 mm×375 mm×1.5 mm, suitable for 5G mobile communication in n77 and n78 frequency bands.
Implementation Method 1
at least one first microstrip line on the second surface of the dielectric layer, wherein each of the at least one first microstrip line is electrically connected to the radiation patch
Implementation Method 2
at least one radiation element on the second surface of the dielectric layer, wherein an orthographic projection of each of the at least one radiation element on the dielectric layer is within an orthographic projection of one of the at least one first slot on the dielectric layer
Implementation Method 3
a dielectric layer having a first surface and a second surface opposite to each other in a thickness direction of the dielectric layer
Implementation Method 4
at least one side edge of the reference electrode layer each is provided with at least one first slot, and the at least one first slot each is an arc-shaped slot
Data Source
AI summary
An antenna includes: a dielectric layer having a first surface and a second surface opposite to each other in a thickness direction thereof; a reference electrode layer on the first surface of the dielectric layer, wherein at least one side edge thereof is each provided with at least one first slot which is arc-shaped; at least one radiation element on the second surface of the dielectric layer, wherein an orthographic projection of each radiation element on the dielectric layer is within an orthographic projection of one first slot on the dielectric layer; and at least one first microstrip line on the second surface of the dielectric layer, wherein each first microstrip line is electrically connected to the radiation patch, and an orthographic projection of the first microstrip line on the dielectric layer at least partially overlaps an orthographic projection of the reference electrode layer on the dielectric layer.