Arc-Edge Radiator Antenna Layout for Compact 5G FR2 Bandwidth
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Solution Overview
Problem
Current antennas fail to meet the bandwidth requirements of 5G mobile telecommunication, particularly at FR2 bands, and have a low bandwidth-to-volume ratio, making them inadequate for compact, portable devices that require multi-broadband and multi-polarization capabilities.
Innovation Solution
The design includes separated radiators with specific geometric configurations, such as arc edges and notches, connected to a ground plane, and conductive parasitic elements to enhance bandwidth and impedance matching, allowing for dual-broadband and dual-polarization communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a stacked patch antenna is used to support two bands, then dual-band capability is achieved, but the bandwidth-to-volume ratio is low and bandwidth requirements are not satisfied
Solution Approach 1:
The antenna is divided into multiple radiating elements with different geometric configurations (full-circle, semi-circle, quarter-circle arc edges) that can be independently optimized for different frequency bands. These segmented elements work together to achieve dual-band operation while maintaining compact overall size, thereby improving the bandwidth-to-volume ratio compared to traditional stacked patch designs.
Solution Approach 2:
Different portions of the radiating elements have different local geometries (varying arc angles, notched sections, and edge configurations) that are specifically designed to resonate at different frequency bands. This local quality variation allows each region of the antenna to contribute to specific band performance, enabling broad bandwidth coverage within a compact volume.
2Volume of moving object
If antenna size is reduced to meet compact device requirements, then portability is improved, but bandwidth and signal isolation performance deteriorate
Solution Approach 1:
The antenna design utilizes three-dimensional spatial arrangement of radiating elements with vertical separation between layers and horizontal positioning optimized for impedance matching. By effectively utilizing all three dimensions within a compact footprint, the antenna achieves broad bandwidth and high isolation (26.3% at 37.0-48.2 GHz band) without increasing overall volume, thus meeting both compact size and performance requirements.
Solution Approach 2:
Multiple radiating elements with different electrical sizes are nested within a compact planar structure, with smaller arc-edge elements positioned within the bounding box of larger elements. This nested arrangement allows multiple resonant modes to coexist in a small volume, achieving dual-band operation with high isolation while maintaining a footprint suitable for portable devices.
3Adaptability or versatility
If radiators are separated to improve bandwidth, then frequency range is expanded, but structural complexity increases
Solution Approach 1:
The separated radiating elements are designed with geometric configurations that allow them to serve multiple functions: each element contributes to both lower and upper frequency bands, provides impedance matching, and maintains structural integrity. This multi-functionality reduces the need for additional separate components, thereby expanding bandwidth without proportionally increasing structural complexity.
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
An antenna is provided. The antenna includes a first radiator (100-1) positioned at a first level (11) and connected to a ground plane (300) at a second level (L2). In a top view, the first radiator (100-1) has a first edge (S1), a second edge (S2), a third edge (S3), a fourth edge (S4) and a first arc edge (AE). The second edge (S2) and the third edge (S3) are connected to opposite ends (E11, E12) of the first edge (S1). The fourth edge (S4) is connected to an end (E31) of the third edge (S3) opposite to the first edge (S1). The first arc edge (AE) with a first radius (r1) has opposite ends (EA1, EA2) respectively connected to the second edge (S2) and the fourth edge (S4). The first arc edge (EA) has a first arc length (LA) corresponding to a first central angle (θC), which is less than 90 degrees.