Multi-Antenna Layout for Bezel-Less Devices in Holding Scenarios
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Solution Overview
Problem
The bezel-less screen design in portable electronic devices reduces antenna clearance, leading to compromised antenna efficiency and performance, especially when the device is held by a user, as radiation efficiency is interfered with by nearby human tissues in various use scenarios.
Innovation Solution
An intelligent multi-antenna system is implemented, with antennas arranged at the top, side, and bottom of the device, forming three antenna groups to enhance radiation efficiency across different scenarios, using a peripheral conductive structure with gaps that allow for antenna switching and tuning to optimize signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the antenna size is reduced to accommodate bezel-less screen design, then the screen-to-body ratio is improved, but the efficiency-bandwidth product of the antenna is reduced
Solution Approach 1:
The antenna system is divided into multiple independent antenna elements (first antenna, second antenna, third antenna, fourth antenna) distributed at different locations (top, bottom, left side, right side) of the device. Each antenna element can operate independently or in combination, allowing the system to maintain adequate radiation efficiency while accommodating the reduced space available due to bezel-less design.
Solution Approach 2:
The patent transitions from traditional single-antenna or dual-antenna configurations to a four-antenna distributed arrangement across multiple dimensions of the device. By utilizing top, bottom, left, and right sides of the device, the system effectively uses spatial distribution in multiple dimensions to maintain antenna performance despite reduced individual antenna sizes.
2Device complexity
If a single antenna configuration is used, then the device structure is simplified, but the radiation efficiency is reduced when the device is held by a user in different scenarios
Solution Approach 1:
The patent implements dynamic antenna selection and switching capability where the system can adaptively choose which antenna or combination of antennas to use based on the device's holding scenario. The antenna switching module dynamically switches between different antenna configurations (single antenna mode, dual antenna mode, four-antenna MIMO mode) according to real-time conditions such as user hand position and signal quality, thereby maintaining high radiation efficiency across different usage scenarios.
Solution Approach 2:
The system changes operational parameters by switching between different antenna subsets and configurations based on detected holding scenarios. When the device is held in portrait mode, certain antennas are prioritized; when held in landscape mode, different antennas are selected. This parameter change approach allows the system to optimize radiation efficiency for each specific holding scenario without requiring a completely different physical antenna structure.
3Reliability
If multiple antennas are distributed at top, side, and bottom positions, then the radiation efficiency in multiple scenarios is improved, but the antenna switching and control complexity increases
Solution Approach 1:
The patent incorporates feedback mechanisms where the antenna switching module receives information about signal quality, holding scenarios, and antenna performance from various sensors and monitoring systems. Based on this feedback, the system automatically adjusts which antennas are active and how they are configured. This feedback-driven approach simplifies the control complexity by using rule-based automatic selection rather than requiring complex manual configuration or sophisticated optimization algorithms.
Data Source
AI summary
A multi-antenna system and an electronic device comprising the same. An intelligent multi-antenna solution in which antennas are laid out at the top, the side, and the bottom of an electronic device is used, so that three antenna groups including a top antenna group, a middle antenna group, and a bottom antenna group are respectively formed, and antenna performance in a plurality of scenarios such as a free-space scenario, a portrait-mode holding scenario, and a landscape-mode holding scenario is considered, to improve antenna radiation efficiency.