Slotted Decoupling Structure for Compact Multiband Antennas
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Solution Overview
Problem
Multiband antennas face efficiency degradation due to electromagnetic coupling, which complicates communication quality and requires increased space and size to maintain performance across different frequency bands.
Innovation Solution
A decoupling apparatus with a conductive body featuring slots that include a dividing part extending to the edge and an intersecting part, allowing for improved decoupling without the need for distant band radiation units, enabling a more compact antenna design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple base-station antenna installations are used to cover different frequency bands, then radio coverage capability is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent implements a single multiband antenna structure that can operate across multiple frequency bands (e.g., 700MHz, 900MHz, 1800MHz, 2100MHz, 2600MHz) simultaneously. The antenna integrates multiple radiation units with different geometries (circular, rectangular, triangular) that resonate at different frequencies, allowing one antenna to replace multiple separate antenna installations and achieve universal frequency band coverage
Solution Approach 2:
The patent employs a nested arrangement where multiple radiation units of different sizes and shapes are positioned within or near each other on the same antenna support structure. Larger radiation units support lower frequency bands while smaller units support higher frequency bands, creating a nested configuration that maximizes space utilization and enables multiband operation from a single antenna structure
2Area of stationary object
If radiation units for different bands are placed close together, then space is saved, but electromagnetic coupling increases and efficiency deteriorates
Solution Approach 1:
The patent introduces decoupling structures positioned between adjacent radiation units to mitigate electromagnetic coupling. These decoupling elements act as intermediaries that reduce mutual interference between radiation units operating at different frequency bands, allowing close placement of units while maintaining individual radiation efficiency and overall antenna performance
Solution Approach 2:
The patent optimizes the local geometric characteristics of each radiation unit (circular, rectangular, triangular shapes with specific dimensions) to enhance resonance at target frequency bands while minimizing coupling with adjacent units. The local quality of each radiation unit is tailored to its specific frequency band, allowing efficient operation in compact proximity to other units
3Device complexity
If a single multiband antenna is used instead of multiple antennas, then device complexity is reduced, but maintaining performance across all bands becomes more difficult
Solution Approach 1:
The patent divides the multiband antenna into multiple independent radiation units, each optimized for specific frequency bands. This segmentation allows each unit to be independently designed and tuned for reliable performance in its target band, while the overall antenna structure maintains simplicity by integrating all units on a single support rather than requiring multiple separate antenna installations
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 decoupling apparatus enhances antenna performance by reducing electromagnetic interference, allowing for a more compact and cost-effective multiband antenna design that increases radiation range without compromising efficiency.
Implementation Method 1
Multiband antennas usually encounter problems such as electromagnetic coupling, which degrade the efficiency, correlation and eventually deteriorate the communication quality of the entire antenna system
Data Source
AI summary
In one embodiment, the decoupling apparatus includes a conductive body adapted to be arranged in the antenna to act as a radiation part of the antenna for transmission of electromagnetic waves with a frequency; and at least one slot formed on the conductive body, wherein the at least one slot comprises a dividing part extending to an edge of the conductive body to divide the edge and an intersecting part intersecting with the dividing part. With the radiation part including the decoupling apparatus, the different band radiation units do not need to be far away from each other to obtain good performance.