Multi-Port Antenna Aperture Tuning for Compact Multi-Band RF Isolation
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Solution Overview
Problem
Computing devices, particularly wearable devices, face challenges in accommodating multiple wireless communication standards due to limited spatial volume, antenna interference, and sensitivity degradation from accessories, necessitating a solution that maximizes antenna efficiency and supports multiple frequency bands.
Innovation Solution
A multi-port antenna structure with a diplexer tuning module and aperture tuning components allows simultaneous communication across two frequency bands, including LTE and Wi-Fi 5G/UWB, using a splitter circuit and neutralizing bridge for signal isolation and independent tuning of each port.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If one antenna is used for all wireless communication standards, then device size is minimized, but the ability to support multiple frequency bands is compromised
Solution Approach 1:
The antenna system is segmented into multiple independent ports (first port and second port), each capable of operating at different frequency bands. The diplexer tuning module segments the RF signals into different frequency paths, allowing each port to be independently tuned and optimized for specific frequency bands while sharing the same physical antenna structure.
Solution Approach 2:
The single antenna structure is designed to perform multiple functions by supporting multiple frequency bands through its multiple ports. The antenna can simultaneously or alternatively operate at first frequency band through the first port and second frequency band through the second port, making it a universal solution that replaces what would traditionally require multiple separate antennas.
2Device complexity
If antenna ports are shared across multiple frequency bands, then device complexity is reduced, but RF front-end performance deteriorates due to signal interference and loss
Solution Approach 1:
The diplexer tuning module acts as an intermediary between the multiple antenna ports and the RF front-end. It separates signals from different frequency bands and directs them to appropriate ports, preventing signal interference. The aperture tuning components serve as intermediaries that independently adjust the radiation characteristics for each frequency band, ensuring optimal performance without cross-band interference.
Solution Approach 2:
The aperture tuning components provide dynamic adjustment capability for each port's radiation pattern and impedance characteristics. This allows the system to adaptively optimize performance for different frequency bands and operating conditions, maintaining high reliability across multiple bands despite the shared antenna structure.
3Volume of moving object
If device footprint is reduced, then portability is improved, but antenna clearance and radiation efficiency are compromised
Solution Approach 1:
The aperture tuning components provide localized adjustment of the antenna's radiation characteristics at specific regions of the antenna structure. By independently tuning the aperture for each frequency band, the system maintains optimal radiation efficiency in the limited space available, compensating for the reduced clearance caused by the compact device footprint.
Data Source
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AI summary
A computing device is provided that includes a single, multi-port antenna that allows for simultaneous communication across two or more frequency bands. Such an arrangement can solve the problem of limited spatial volume within the cavity of the housing for additional antennas. The presence of a diplexer tuning module in combination with aperture tuning components allows for a single antenna structure to support multiple frequency bands with a cost effective hardware solution and efficiency with respect to available space for such hardware. In this regard, the multi-port (e.g., two-port) antenna of the present disclosure can support multiple frequency bands simultaneously, including, but not limited to long-term evolution (LTE), Wideband Code Division Multiple Access (WCDMA), GPS, n255, Wi-Fi 2.4, Wi-Fi 5G, Wi-Fi 6E, Bluetooth, and ultra-wideband (UWB) for wide area networks and local area networks.