Antenna Array Lateral Radiation for Portable Devices
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Solution Overview
Problem
Incorporating antenna arrays in portable electronic devices, especially at millimeter-wave frequencies, is challenging due to space constraints, leading to interference with device components and body parts, which results in significant gain reduction and difficulty in satisfying phase and amplitude control requirements.
Innovation Solution
An antenna array configuration that concentrates radiation laterally through the sidewall of portable electronic devices, with multiple antenna elements electrically coupled to a printed circuit board, utilizing a grounding scheme and various antenna types such as patch, monopole, and dipole arrays, to minimize interference and optimize radio wave transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna array is positioned to concentrate radiation towards the device display, then communication performance is improved, but antenna gain is significantly reduced due to interference with device display and intermediary components
Solution Approach 1:
The patent transitions from conventional planar antenna arrays to a three-dimensional conformal antenna array that wraps around the device housing. This spatial reconfiguration allows the antenna elements to be positioned in multiple dimensions, enabling radiation concentration toward the display while avoiding interference zones created by planar component layouts.
2Reliability
If the antenna array is positioned to concentrate radiation towards the wearer's hand or body part, then communication performance is improved, but antenna gain is significantly reduced due to interference with the wearer's body part
Solution Approach 1:
The patent implements non-uniform distribution of antenna elements around the device housing, with higher element density in regions optimized for hand/wrist wear and lower density in regions where body interference is expected. This local optimization allows the array to concentrate radiation toward the wearer's hand while minimizing gain reduction from body part interference.
3Volume of moving object
If the device form factor is reduced to a small size, then portability is improved, but it becomes more difficult to satisfy phase and amplitude control requirements for the antenna array
Solution Approach 1:
The patent employs dynamic beamforming capabilities with electronically controllable phase and amplitude adjustment for each antenna element. This allows the system to adaptively optimize radiation patterns in real-time, compensating for the challenges posed by compact form factor constraints and enabling precise control despite reduced physical dimensions.
4Reliability
If multiple antenna elements are incorporated to form the antenna array, then millimeter-wave communication is enabled, but space constraints in portable devices make it difficult to incorporate multiple elements
Solution Approach 1:
The patent integrates the antenna array within the device housing structure by conforming the antenna elements to the housing contours. This nesting approach allows multiple antenna elements to be packed into the available three-dimensional space within and around the housing, enabling millimeter-wave communication capabilities without significantly increasing device volume.
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 decreases the likelihood of antenna gain reduction due to interference, allowing for effective radio wave transmission and reception while freeing up space for other antennas, such as GPS and Bluetooth, and supports operation at multiple frequencies.
Implementation Method 1
antenna array configured to concentrate radiation laterally through a radiation plane that is parallel to the housing sidewall
Implementation Method 2
utilizing a grounding scheme and various antenna types such as patch, monopole, and dipole arrays, to minimize interference
Data Source
AI summary
Apparatus includes a device housing, a device face, a printed circuit board (PCB), and an antenna array. The device housing has a shape characterized by an axis, a planar housing surface that is perpendicular to the axis, and a housing sidewall that is parallel to the axis. The housing sidewall is positioned along a periphery of a planar housing surface. The device face is positioned at an opposite end of the device housing from the planar housing surface. The PCB is positioned between and parallel to the planar housing surface and the device face. The antenna array has multiple antenna elements at least some of which are electrically coupled to the PCB. The antenna array is configured to concentrate radiation of radio waves laterally through a radiation plane that is parallel to the sidewall of the housing and that is perpendicular to the device face and the planar housing surface.