Co-Ground Dipole Antenna Assembly for Better Wi-Fi Isolation
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Solution Overview
Problem
Existing wireless routers with dual-band Wi-Fi antennas suffer from poor antenna imbalance, leading to suboptimal performance, particularly in throughput, due to perpendicular antenna directivity curves causing significant differences in frequency points.
Innovation Solution
An antenna assembly design featuring a magnetic dipole and an electric dipole antenna with radiators welded at a feed point, forming a co-ground structure, and connected via a balun structure and shorted stubs to enhance isolation and balance, improving antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two electric dipole antennas are cross-placed to form a dual-band Wi-Fi antenna, then horizontal coverage is ensured, but antenna isolation deteriorates due to perpendicular antenna directivity curves causing significant differences in frequency points
Solution Approach 1:
The patent combines an electric dipole antenna and a magnetic dipole antenna into a single integrated antenna assembly. The electric dipole antenna provides dual-band Wi-Fi coverage while the magnetic dipole antenna provides 5G coverage, merging multiple antenna functions into one structure to achieve both horizontal coverage and improved isolation through complementary radiation patterns
Solution Approach 2:
The patent employs a composite antenna structure integrating two different antenna types (electric dipole and magnetic dipole) with different radiation characteristics. This composite approach allows the system to leverage the advantages of both antenna types, achieving improved isolation through their complementary directivity patterns while maintaining broad frequency coverage
2Reliability
If two electric dipole antennas are cross-placed with perpendicular directivity curves, then antenna isolation is improved, but imbalance degree deteriorates resulting in poor antenna performance
Solution Approach 1:
The patent introduces asymmetry by combining antennas with different radiation patterns (electric dipole with omnidirectional pattern and magnetic dipole with directional pattern). This asymmetric configuration prevents the perfect perpendicular alignment that causes imbalance, allowing the antenna assembly to achieve good isolation without suffering from the same imbalance problems that affect identical cross-placed antennas
3Reliability
If radiators are welded to a feed point forming a co-ground structure, then antenna isolation is enhanced, but device complexity increases due to balun structure and shorted stubs
Solution Approach 1:
The feed point structure serves multiple functions simultaneously: it acts as a welding point for connecting radiators, provides a co-ground structure for isolation enhancement, and integrates the balun structure and shorted stubs for impedance matching and current balancing. By making the feed point multi-functional, the patent reduces the need for separate components and simplifies the overall assembly process despite the enhanced isolation requirements
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 design enhances antenna isolation and balance, resulting in improved throughput and dual-band coverage, with increased isolation of up to 5 dB in the 5G frequency band.
Implementation Method 1
a balun structure, where the balun structure is connected to the second stub, the third stub, and the fourth stub
Implementation Method 2
a shorted stub, where the first stub is connected to the balun structure by using the shorted stub
Data Source
AI summary
An antenna assembly and an electronic apparatus, in to the field of antenna technologies, where the antenna assembly includes a first magnetic dipole antenna comprising a first radiator and a first electric dipole antenna comprising a second radiator, where the first radiator of the first electric dipole antenna and the second radiator of the first magnetic dipole antenna are perpendicular to each other.