Multi-Broadband Antenna With Meandering Ground Walls
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Solution Overview
Problem
Conventional antennas, such as stacked patch antennas, fail to meet the bandwidth requirements of 5G mobile telecommunication and have a relatively low bandwidth-to-volume ratio, making them inadequate for modern electronic devices that require multi-broadband and multi-polarization communication with compact size and high signal isolation.
Innovation Solution
The antenna design includes a plurality of mutually separated radiators configured to function as dipoles, each with a conductive arm and ground wall, and parasitic elements that are insulated and partially surround the radiators, along with meandering ground walls and coupling elements, to achieve dual-broadband and dual-polarization capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional stacked patch antenna is used to support two bands, then the antenna can provide dual-band functionality, but the bandwidth is insufficient to meet 5G requirements and the bandwidth-to-volume ratio is low
Solution Approach 1:
The antenna is divided into multiple independent radiating elements (first and second radiating elements) with distinct ground structures (first and second ground walls). Each element can be independently optimized for different frequency bands, allowing the antenna to achieve multi-band and broadband operation while maintaining a compact overall structure that improves bandwidth-to-volume ratio.
Solution Approach 2:
The patent introduces vertical dimension by using ground walls that extend in the depth direction rather than only in the planar dimension. The meandering portions of ground walls create three-dimensional current paths that increase effective electrical length without increasing planar footprint, enabling broadband performance in a compact volume.
2Volume of moving object
If the antenna structure is made compact to reduce device size, then the form factor is improved, but achieving sufficient bandwidth and signal isolation becomes difficult
Solution Approach 1:
The meandering portions of ground walls introduce curved and folded current paths instead of straight lines. This increases the effective electrical length of the ground structures without proportionally increasing the physical volume, enabling the compact antenna to achieve resonances at multiple frequency bands and maintain sufficient bandwidth.
Solution Approach 2:
The antenna structure nests multiple functional elements within a compact volume - radiating elements are positioned between ground walls, parasitic elements are strategically placed to enhance bandwidth, and meandering ground walls are folded back on themselves to maximize electrical length within minimal physical space.
3Adaptability or versatility
If multiple radiating elements are used to achieve multi-polarization and broadband, then the bandwidth and polarization diversity are improved, but the device complexity increases
Solution Approach 1:
The first and second radiating elements are positioned asymmetrically with respect to the ground walls, and the ground walls themselves have asymmetric meandering patterns. This asymmetric configuration enables the antenna to support both horizontal and vertical polarizations while maintaining broadband performance, as the asymmetric structures create complementary radiation patterns.
Solution Approach 2:
Each radiating element and ground wall combination is designed to serve multiple functions: providing radiation for different polarizations, creating resonances at multiple frequency bands, and contributing to impedance matching. The parasitic elements also serve dual purposes of bandwidth enhancement and polarization isolation, reducing the need for additional separate components.
4Adaptability or versatility
If parasitic elements are added to enhance bandwidth, then the bandwidth-to-volume ratio is improved, but the manufacturing complexity increases
Solution Approach 1:
Parasitic elements are strategically placed only in specific locations where they provide maximum bandwidth enhancement - typically near the radiating elements but not interfering with the main radiation paths. This localized approach achieves bandwidth improvement without requiring parasitic elements throughout the entire antenna structure, simplifying manufacturing.
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 enhances bandwidth, increases the bandwidth-to-volume ratio, improves impedance matching, reduces undesired radiation directivity tilt, and provides superior signal isolation between polarizations, effectively supporting 5G mobile telecommunication with MIMO diversity.
Implementation Method 1
each radiator may be configured to contribute to resonances at two or more nonoverlapping bands
Implementation Method 2
The plurality of radiators may be configured to jointly function as one or more (e.g., two) dipoles
Data Source
AI summary
The invention provides an antenna for multi-broadband and multi-polarization communication, which may include a plurality of radiators configured to jointly function as one or more dipoles, and a plurality of parasitic elements. Each radiator may be configured to contribute to resonances at two or more nonoverlapping bands, and may comprise an arm and a ground wall connecting the arm and a ground plane. The arm may comprise an arm plate and a folded arm. The ground wall may comprise a meandering portion causing a distance between the arm and the ground plane to be shorter than a length of a current conduction path along the ground wall between the arm and the ground plane. On a geometric reference surface, a projection of each parasitic element may extend between two gaps which clamp a projection of an associated one of the radiators.