Dual-Polarized Antenna Layout Using Angled Bandgap Isolation
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Solution Overview
Problem
Existing dual polarized antennas suffer from low signal quality due to low isolation between multiple signals in multi-input multi-output applications.
Innovation Solution
A dual polarized antenna design featuring a dielectric board with an antenna array and adjacent electromagnetic bandgap structures, where the included angle between polarization directions and bandgap structures is neither 0° nor 90°, allowing for high isolation and directivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electromagnetic bandgap structures are added to the antenna design, then isolation between multiple signals is improved, but device complexity increases
Solution Approach 1:
The electromagnetic bandgap structure is divided into multiple unit structures arranged in an array. Each unit structure consists of conductive elements formed on the substrate, creating a segmented pattern that provides the desired isolation effect while maintaining manufacturing feasibility through repetitive modular design.
Solution Approach 2:
The bandgap structure is positioned specifically between adjacent antenna elements where isolation is most needed. The conductive elements are strategically arranged to create electromagnetic isolation in critical regions while leaving other areas open for proper signal radiation and reception.
2Reliability
If the included angle between polarization direction and bandgap structure is optimized (neither 0° nor 90°), then directivity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The design specifies an included angle range (greater than 0° and greater than 90°) rather than a single precise value. This parameter optimization allows the antenna to achieve improved directivity while providing manufacturing tolerance, as long as the angle falls within the specified range rather than requiring exact precision.
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 signal transmission distance and efficiency by blocking unwanted signals while maintaining high isolation and directivity, suitable for applications like 5G communication.
Implementation Method 1
a first electromagnetic bandgap structure formed on the dielectric board and disposed adjacent to the antenna array; and a second electromagnetic bandgap structure formed on the dielectric board and disposed outside the antenna array
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A dual polarized antenna includes a first antenna unit and an isolated band gap. The first antenna unit is formed on the dielectric board, and the first antenna unit being conducted is configured to receive or transmit a signal with each of a first polarized direction and a second polarized direction. The isolated band gap is formed on the dielectric board and is disposed adjacent to the first antenna unit. It forms a first included angle which is neither 0° nor 90° between the first polarized direction and the isolated band gap.