3D Arcuate Antenna Module Layout for Low-Coupling Isolation
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Solution Overview
Problem
Wireless devices face challenges with limited space for multiple antennas, leading to low efficiency and high mutual coupling between different antenna ports, which affects their radiation performance.
Innovation Solution
The antenna module employs a flexible circuit with multiple antenna elements, each coupled to a ground short stub and extending along an arcuate path, utilizing a ground plane and spherical substrate to achieve high isolation and omnidirectional radiation patterns, with transmission coefficients below −10 dB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are placed in a compact device, then the device can support multiple wireless communication functions, but the antenna radiation efficiency decreases and mutual coupling increases
Solution Approach 1:
The patent transitions from planar antenna layouts to three-dimensional arcuate paths that wrap around the device volume. The radiating elements follow curved trajectories in 3D space, utilizing vertical and lateral dimensions to achieve spatial separation between antenna ports while maintaining compact footprint.
Solution Approach 2:
The antenna elements are nested within the device volume by wrapping them around the interior space. The flexible circuit carrying the antenna elements is conformally positioned within the device housing, effectively nesting the antenna structure within the available volume.
2Adaptability or versatility
If multiple antennas are placed in a compact device, then the device can support multiple wireless communication functions, but the isolation between antenna ports deteriorates
Solution Approach 1:
The patent employs three-dimensional arcuate paths that extend in multiple spatial dimensions to separate antenna elements. The curved paths in 3D space provide greater spatial separation between different antenna ports compared to planar arrangements, reducing electromagnetic coupling.
Solution Approach 2:
The radiating elements follow arcuate (curved) paths rather than straight lines. This curvature allows the antenna elements to wrap around the device volume, maximizing spatial separation and minimizing mutual coupling between adjacent antenna ports.
3Volume of moving object
If antenna elements are arranged in compact space, then the device size is reduced, but the antenna radiation pattern becomes distorted
Solution Approach 1:
The radiating elements are configured to follow arcuate paths that approximate portions of spherical or cylindrical geometries. This curved arrangement maintains consistent spacing from the device center, preserving omnidirectional radiation characteristics while fitting within compact volume.
Solution Approach 2:
The patent employs ground short stubs at specific locations along the arcuate paths to locally control the electrical length and impedance of each antenna element. This local adjustment ensures consistent radiation patterns despite the compact three-dimensional arrangement.
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 provides a compact wireless device with efficient 3D omnidirectional coverage, high radiation efficiency, and reduced coupling between antenna elements, enabling effective communication with wireless devices and GPS satellites.
Implementation Method 1
a first radiating element defining an omnidirectional radiation pattern. The first radiating element includes a first main segment extending along a first arcuate path
Data Source
AI summary
An antenna module is provided and includes a flexible circuit having a first antenna feed and a second antenna feed. The antenna module includes a ground plane. The antenna module includes a first antenna element coupled to the first antenna feed. The first antenna element includes a first ground short stub coupled to the ground plane. The first antenna element includes a first radiating element defining an omnidirectional radiation pattern. The first radiating element includes a first main segment extending along a first arcuate path. The antenna module includes a second antenna element coupled to the second antenna feed. The second antenna element includes a second ground short stub coupled to the ground plane. The second antenna element includes a second radiating element defining an omnidirectional radiation pattern. The second radiating element includes a second main segment extending along a second arcuate path oriented parallel to the first arcuate path. The first and second antenna elements have a transmission coefficient lower than −10 dB.