Folded Phased Antenna Module for Thin Sidewall Integration
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Solution Overview
Problem
Electronic devices face challenges in incorporating millimeter and centimeter wave communications due to substantial signal attenuation and distortion, as well as the bulkiness of antennas and interference from conductive components, making it difficult to integrate efficient wireless communications circuitry.
Innovation Solution
The integration of a phased antenna array within a folded flexible printed circuit, mounted in apertures of the device's peripheral conductive housing structures, which minimizes thickness and allows for efficient radiation of radio-frequency signals at millimeter and centimeter wave frequencies without occupying excessive space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional antennas are used for millimeter and centimeter wave communications, then wireless communication capability is achieved, but the antenna becomes undesirably bulky and occupies excessive space
Solution Approach 1:
The antenna is divided into multiple discrete elements arranged in a phased array configuration. Each element is a small radiating structure that can be independently controlled, allowing the overall antenna system to achieve millimeter and centimeter wave capabilities while keeping individual elements compact and the total volume minimized
Solution Approach 2:
The patent transitions from traditional planar antenna layouts to a three-dimensional phased array structure. By distributing antenna elements across multiple dimensions and using spatial arrangement, the design achieves enhanced radiation efficiency and communication capability without increasing the footprint area, effectively utilizing vertical and depth dimensions to reduce overall volume
2Reliability
If conductive components are added to handle millimeter and centimeter wave signals, then signal handling capability is improved, but interference from conductive components increases
Solution Approach 1:
The patent introduces a dielectric substrate as an intermediary material between the antenna elements and the conductive housing structures. This dielectric layer acts as a mediator that allows the antenna elements to be mounted securely while electrically isolating them from interfering conductive components, thereby maintaining signal integrity and reducing unwanted coupling effects
Solution Approach 2:
The use of thin dielectric films and flexible circuit board materials allows for close integration of antenna elements with the housing structure while maintaining electrical isolation. These thin film structures provide mechanical support and electrical insulation simultaneously, enabling effective signal handling without the bulkiness of traditional conductive shielding
3Volume of moving object
If antenna module thickness is reduced to fit in compact housing, then space utilization is improved, but manufacturing precision requirements increase
Solution Approach 1:
The antenna module is segmented into standardized, modular elements that can be manufactured with consistent dimensions using automated PCB fabrication processes. This segmentation allows for precise positioning and repeatable assembly, reducing the impact of thickness reduction on overall manufacturing precision requirements
Solution Approach 2:
The patent employs precise control of key geometric parameters in the antenna element design, such as patch dimensions, spacing, and orientation. By optimizing these parameters through simulation and analysis, the design achieves the required performance at reduced thickness while maintaining manufacturing feasibility through standard fabrication tolerances
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 solution enables effective wireless communications by reducing antenna thickness and optimizing space usage, enhancing signal transmission and reception efficiency while maintaining a compact device design.
Implementation Method 1
The phased antenna array may be formed on an antenna module. The antenna module may be mounted in the housing such that each antenna in the phased antenna array radiates through a respective one of the apertures
Data Source
AI summary
An electronic device may be provided with a conductive housing sidewall and a phased antenna array that conveys radio-frequency signals at frequencies greater than 10 GHz. Each antenna in the array may radiate through a respective aperture in the sidewall. The antenna module may include a folded flexible printed circuit having a first portion and a second portion that extends from an end of the first portion and that is folded with respect to the first portion. The antennas in the phased antenna array may have antenna resonating elements that are distributed between the first and second portions. Forming the antenna module from a folded flexible printed circuit in this way may serve to minimize the thickness of the antenna module, thereby allowing the antenna module to fit between a ledge of the sidewall and a rear housing wall without occupying excessive space within the device.