Low-Frequency Radiation Unit Layout for 4G-5G Antenna Decoupling
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Solution Overview
Problem
The strong coupling between the array element Balun of a 4G antenna system and the array element of a nested 5G antenna system in multi-frequency antennas affects radiation performance indexes such as wave width, front-to-back ratio, side lobe, and circuit performance indexes like standing waves and isolation degrees.
Innovation Solution
A low frequency radiation unit comprising a PCB dielectric plate, medium support frame, coaxial cable, and metal radiators is disposed on a metal reflection plate, with orthogonal radiation oscillators and a decoupling design to reduce mutual coupling, allowing a 4G antenna to be positioned above a 5G antenna, thereby avoiding interference and saving internal space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a 4G low frequency antenna is nested with a 5G high frequency antenna in a multi-frequency shared antenna system, then resource configuration is optimized and site location resources are saved, but strong coupling occurs between the array element Balun of the 4G system and the array element of the 5G system, seriously affecting radiation performance indexes such as wave width, front-to-back ratio, and side lobe, as well as circuit performance indexes such as standing waves and isolation degrees
Solution Approach 1:
The patent introduces a decoupling structure as an intermediary element between the 4G and 5G antenna systems. This decoupling structure acts as a mediator that reduces the strong coupling interaction between the array element Balun of the 4G system and the array element of the 5G system, thereby protecting the radiation performance of both systems while maintaining their multi-frequency functionality
Solution Approach 2:
The patent segments the multi-frequency antenna system into distinct functional modules with independent feeding structures. By dividing the 4G and 5G antenna elements into separate nested arrangements with independent feed networks, the system achieves multi-frequency compatibility while reducing mutual coupling through spatial segmentation and independent impedance control
2Device complexity
If a 4G low frequency antenna is nested with a 5G high frequency antenna, then device complexity is reduced and space is saved, but the coupling between array element Balun and array element affects circuit performance indexes such as standing waves and isolation degrees
Solution Approach 1:
The patent implements a nested doll structure where the 5G high frequency antenna elements are nested within the 4G low frequency antenna elements. This nested arrangement reduces device complexity and saves space by combining multiple frequency systems into a single physical structure, while independent feeding networks maintain circuit performance by preventing interference between the nested systems
Solution Approach 2:
The patent introduces decoupling structures as intermediary elements between the nested 4G and 5G antenna systems. These intermediaries reduce the strong coupling interaction that would otherwise degrade circuit performance indexes such as standing waves and isolation degrees, while maintaining the compact nested configuration
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 effectively reduces mutual coupling, enhances radiation and circuit performance indexes, and enables a compact, cost-effective multi-frequency shared antenna architecture.
Implementation Method 1
metal radiators provided on a front side and back side of the PCB dielectric plate 10
Implementation Method 2
The medium support frame 70 is connected to the metal radiators, and is configured to support the metal radiators
Implementation Method 3
The coaxial cable 80 is disposed on the medium support frame 70, is connected to the metal radiators, and feeds the metal radiators
Implementation Method 4
a Printed Circuit Board (PCB) dielectric plate 10
Data Source
AI summary
Provided in the embodiments of the present disclosure are a low frequency radiation unit, an antenna, a multi-frequency shared antenna, and a fusion antenna architecture. The low frequency radiation unit is disposed on a side of a metal reflection plate, and includes a Printed Circuit Board (PCB) dielectric plate 10, a medium support frame 70, a coaxial cable 80, and metal radiators provided on a front side and back side of 10. 70 is connected to the metal radiators, and is configured to support the metal radiators. 80 is disposed on 70, is connected to the metal radiators, and feeds the metal radiators. Such that a 4G low frequency antenna is flexibly disposed above a 5G high frequency antenna, thereby avoiding interference of Balun with the 5G high frequency antenna; and low mutual coupling is achieved, such that internal space of an antenna is saved.