Thinned Dielectric Substrate for Millimeter Wave Antenna Arrays
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Solution Overview
Problem
Electronic devices face challenges in supporting millimeter wave communications due to substantial attenuation and distortion of signals during propagation, which existing wireless communications circuitry struggles to effectively address.
Innovation Solution
The implementation of a phased antenna array with a dielectric cover and a thinned dielectric substrate to reduce surface wave interference, coupled with a ground layer and transmission line structures, enhances signal transmission and reception by mitigating interference and distortion, allowing for beam steering and improved signal coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dielectric substrate is used to support antenna elements, then mechanical support and electrical isolation are provided, but surface wave interference between adjacent antennas increases
Solution Approach 1:
The patent removes portions of the dielectric substrate between adjacent antenna elements to create thinned regions. This extraction of dielectric material eliminates the medium that supports surface waves, thereby reducing interference between antennas while maintaining the structural integrity and electrical isolation provided by the remaining substrate portions.
Solution Approach 2:
The patent applies local quality by creating regions of different substrate thicknesses - full thickness under antenna elements for support and isolation, but thinned or removed portions between elements to reduce surface wave interference. This localized modification optimizes both mechanical support and interference mitigation in different spatial locations.
2Productivity
If millimeter wave communications are implemented, then high bandwidth is achieved, but substantial attenuation and distortion during signal propagation occur
Solution Approach 1:
The patent converts the harmful effect of surface waves into a beneficial design feature by strategically removing dielectric material. The thinned regions allow controlled surface wave propagation paths that do not interfere with adjacent antennas, transforming what would be a source of interference into a mechanism for managing electromagnetic energy distribution.
Solution Approach 2:
The patent segments the dielectric substrate into regions of different thicknesses - full thickness regions under each antenna element and thinned regions between elements. This segmentation allows the substrate to simultaneously provide mechanical support, electrical isolation, and controlled electromagnetic field management for millimeter wave signals.
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 configuration improves signal quality and coverage for millimeter wave communications by reducing surface wave interference and distortion, enabling more effective beam steering and increased bandwidth, thus enhancing the performance of electronic devices in handling high-frequency wireless communications.
Implementation Method 1
The dielectric substrate may have one or more thinned regions between antenna elements of the phased antenna array to reduce surface wave interference between adjacent antennas in the phased antenna array
Data Source
AI summary
An electronic device may be provided with wireless communications circuitry and control circuitry. The wireless communications circuitry may include centimeter and millimeter wave transceiver circuitry and a phased antenna array. A dielectric cover may be formed over the phased antenna array. The phased antenna array may transmit and receive antenna signals through the dielectric cover. The dielectric cover may have a surface that faces the phased antenna array and may have a curvature. The antenna elements of the phased antenna array may be formed on a dielectric substrate. The dielectric substrate may have one or more thinned regions between antenna elements of the phased antenna array to reduce surface wave interference between adjacent antennas. The dielectric substrate may have a smaller thickness in the thinned region than in the regions under the antenna elements. The dielectric substrate may be totally removed in the thinned region.