Multi-standby Terminal Antenna Interference Control
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Solution Overview
Problem
Conventional multi-standby portable terminals face interference issues among multiple antennas, leading to deteriorated communication performance due to the inability to completely isolate antennas, making it difficult to switch between different RF communication networks efficiently.
Innovation Solution
A multi-standby portable terminal design that includes multiple communication modules and a controller to selectively control antenna patterns and impedance matching units, allowing only the active communication module to operate within the selected RF communication network's frequency band and impedance match, while the others operate outside these bands to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are installed in the portable terminal to support different RF communication networks, then the terminal can simultaneously support multiple communication networks, but the antennas interfere with each other and communication performance deteriorates
Solution Approach 1:
The patent applies dynamics by making the antenna patterns adjustable and switchable. The controller dynamically changes the antenna patterns of communication modules based on the currently selected network, allowing the system to adapt between different operational states (CDMA mode, GSM mode, or both) to minimize interference and optimize communication performance for each network type.
Solution Approach 2:
The patent changes the parameter of antenna patterns from fixed to variable. By allowing the antenna patterns to be adjusted according to the selected communication network (CDMA or GSM), the system optimizes the electromagnetic characteristics for each network type, thereby reducing interference between multiple antennas while maintaining multi-network support capability.
2Adaptability or versatility
If the portable terminal switches between communication networks by booting, entering idle mode, and operating menus, then the terminal can change networks, but the switching process is complicated and time-consuming
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple communication modules with different antenna patterns for CDMA and GSM networks. The system prepares the necessary network parameters and antenna configurations in advance, so when network switching is needed, the controller can quickly switch between pre-configured modes without requiring complex user operations or lengthy setup procedures.
Solution Approach 2:
The system performs self-service by automatically managing network switching based on user selections. The controller autonomously adjusts antenna patterns, switches between communication modules, and configures network parameters without requiring manual intervention for each switching step, thereby simplifying the user experience while maintaining versatile network switching capability.
3Adaptability or versatility
If all communication modules operate simultaneously, then the terminal can maintain connectivity with multiple networks, but interference among antennas increases and communication performance deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the antenna operation into distinct segments based on selected network mode. When CDMA mode is selected, only the CDMA communication module operates with its dedicated antenna pattern, while the GSM module's antenna pattern is adjusted or deactivated. This segmentation isolates the electromagnetic operations to specific segments, reducing cross-interference while maintaining the ability to connect to multiple networks when needed.
Solution Approach 2:
The controller acts as an intermediary that mediates between multiple communication modules and antennas. It selectively activates or deactivates specific antenna patterns based on the selected network mode, coordinating the operations of different modules to minimize mutual interference. The intermediary controller ensures that only necessary modules operate simultaneously while maintaining overall system coherence and network connectivity.
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 approach optimizes antenna performance by reducing interference between different frequency bands, enhancing communication efficiency and stability when switching between multiple RF communication networks.
Implementation Method 1
the communication module corresponding to the selected RF communication network radiates electromagnetic waves corresponding to a frequency band of the selected RF communication network
Implementation Method 2
the remaining communication modules, other than the communication module corresponding to the selected RF communication network, radiate electromagnetic waves of frequency bands that differ from those of respective corresponding RF communication networks
Data Source
AI summary
A multi-standby portable terminal reduces interference of the transmitting antenna by skewing electromagnetic waves of others antennas. The terminal includes: a plurality of communication modules for transmitting and receiving RF signals of different frequency bands to and from the plurality of RF communication networks; and a controller for controlling the plurality of communication modules so as to be coupled to an RF communication network selected by a user, via a communication module corresponding to the selected RF communication network. The controller performs a control operation such that the communication module corresponding to the selected RF communication network radiates electromagnetic waves corresponding to a frequency band of the selected RF communication network, and remaining communication modules radiate electromagnetic waves of frequency bands that differ from those of respective corresponding RF communication networks.