Multi-Antenna Dual Connectivity Layout for SAR-Limited Band Expansion
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Solution Overview
Problem
Current electronic devices with next-generation network capabilities face limitations in expanding frequency band coverage due to restricted antenna arrangement spaces, leading to performance degradation and challenges in meeting specific absorption rate (SAR) standards.
Innovation Solution
The implementation of a communication module with multiple antennas, including a first antenna for transmitting a signal of a first frequency band and a second antenna for transmitting a signal of a second frequency band, which is either the same or higher than the first frequency band, while also incorporating a third antenna for receiving GPS signals and a fourth antenna for transmitting non-overlapping signals, allowing for dual connectivity and expanded frequency band coverage within a limited antenna arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple antennas are added to expand frequency band coverage, then bandwidth and total radiated power are improved, but device complexity and antenna arrangement space requirements increase
Solution Approach 1:
The patent implements a multi-functional antenna system where the first antenna handles first frequency band signals, the second antenna handles second frequency band signals, the third antenna receives GPS signals, and the fourth antenna transmits non-overlapping signals. This multi-functionality approach allows the device to support multiple frequency bands and communication standards simultaneously, expanding frequency band coverage without proportionally increasing device complexity
Solution Approach 2:
The patent strategically positions antennas at different locations around the device housing (first antenna near second side surface, second antenna near first side surface, third antenna near third side surface, fourth antenna near fourth side surface). This spatial distribution across multiple dimensions reduces signal interference and allows efficient use of limited antenna arrangement space while maintaining frequency band expansion
2Power
If antenna power is increased to improve total radiated power, then transmission performance is improved, but specific absorption rate (SAR) standards may be violated
Solution Approach 1:
The patent divides the transmission power across multiple antennas (first, second, and fourth antennas) operating in different frequency bands. By segmenting the total radiated power delivery across multiple transmission paths rather than concentrating power in a single antenna, the system achieves improved total radiated power while distributing the specific absorption rate exposure, enabling compliance with SAR standards
Solution Approach 2:
The patent utilizes different frequency bands (first frequency band, second frequency band, and non-overlapping bands) with distinct propagation characteristics and SAR profiles. By changing the operational parameters to include multiple frequency bands with different penetration and absorption characteristics, the system can optimize total radiated power while maintaining SAR compliance through appropriate power allocation across bands
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 enhances bandwidth and total radiated power (TRP) of transmission signals, particularly for low-frequency bands, and allows for compliance with SAR standards without power backoff, thereby improving connectivity and performance in next-generation networks.
Implementation Method 1
a first antenna connected to a first communication port of the plurality of communication ports and configured to transmit a signal of a first band of a first frequency band
Implementation Method 2
a second antenna connected to a second communication port of the plurality of communication ports and configured to transmit a signal of a second band different from the first band of the first frequency band
Data Source
AI summary
According to an embodiment, the electronic device relates to an electronic device for providing dual connectivity of a second frequency band, and may include a communication unit including a plurality of communication ports, a first antenna connected to a first communication port of the plurality of communication ports and configured to transmit a signal of a first band of a first frequency band, and a second antenna connected to a second communication port of the plurality of communication ports and configured to transmit a signal of a second band different from the first band of the first frequency band while the signal of the first band is transmitted. The second frequency band includes at least one frequency band selected from the group consisting of the first frequency band and a frequency band higher than the first frequency band.