Dual-Polarized Base Station Antenna With Interleaved X-Shaped Modules
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Solution Overview
Problem
Conventional dual-band dual-polarized antennas for mobile communication systems face challenges in achieving optimal structure arrangement, size, stability, and ease of beam width adjustment, often resulting in complex designs and high costs due to spatial constraints and polarization diversity requirements.
Innovation Solution
A dual-band dual-polarized antenna design featuring a reflection plate with interleaved first and second radiating element modules, where the first modules form an X-shaped structure with folded dipoles arranged at +45 and -45 degrees, and the second modules are integrated between them, allowing for a simpler and more stable antenna configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dual-band dual-polarized antennas use separate radiating element modules for different frequency bands arranged at specific distances, then polarization diversity and frequency separation are achieved, but the antenna structure becomes complex and spatial constraints increase
Solution Approach 1:
The patent combines radiating elements for different frequency bands and polarization modes into a single integrated radiating element module. The module includes first and second dipole elements arranged in an X-shape configuration, where the first dipole elements handle one polarization mode and the second dipole elements handle the orthogonal polarization mode, all within the same physical structure rather than separate modules.
Solution Approach 2:
The radiating element module is designed to perform multiple functions simultaneously: it supports both frequency bands (first and second frequency bands) and both polarization modes (first and second orthogonal polarizations) using a single integrated structure, eliminating the need for separate dedicated modules for each function.
2Reliability
If radiating element modules are spaced apart to achieve frequency separation and polarization diversity, then signal isolation is improved, but the antenna size and spatial requirements increase
Solution Approach 1:
The patent transitions from a planar arrangement where elements are spaced apart in two dimensions to a three-dimensional X-shaped configuration. The dipole elements are arranged in orthogonal directions with specific spacing relationships (a2 > a1), creating spatial separation in multiple dimensions simultaneously, which achieves signal isolation while compacting the overall footprint.
Solution Approach 2:
The radiating elements for different frequency bands and polarization modes are nested within the same radiating element module structure. The first and second dipole elements are positioned relative to each other within the module, with the second dipole elements placed at greater distances to handle higher frequency bands, creating a nested hierarchical arrangement.
3Reliability
If conventional antennas use complex interleaved arrangements of radiating element modules, then beam width adjustment and performance optimization are achieved, but manufacturing and adjustment complexity increase
Solution Approach 1:
The patent segments the antenna into multiple identical or similar radiating element modules, each with the same internal X-shaped dipole structure. This modular segmentation allows for standardized manufacturing of individual modules, which can then be assembled in arrays with controlled spacing to achieve desired beam widths and radiation patterns, simplifying both manufacturing and adjustment processes.
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
This design achieves an optimal structure arrangement, stable characteristics, easy beam width adjustment, and a simpler antenna design, improving the Cross-Polarization Ratio (CPR) and overall performance while reducing complexity and costs.
Implementation Method 1
a first radiating element module 10 to transmit and receive two linear orthogonal polarized waves for a first frequency band
Implementation Method 2
disposed at a front side of an electro-conductive reflection plate 5... improving a radiation characteristic
Data Source
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AI summary
Disclosed is a dual-band dual-polarized antenna of a base station for mobile communication, the dual-band dual-polarized antenna including: a reflection plate; one or more first radiating element modules formed on the reflection plate to transmit and receive two linear orthogonal polarized waves for a first frequency band, the one or more first radiating element modules including a plurality of dipoles installed in a general 'X' shape; and one or more second radiating element modules for a second frequency band, which are interleaved between the first radiating element modules on the reflection.