RF Front-End Antenna Segmentation for Mobile Terminals
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Solution Overview
Problem
The challenge is to reduce the large antenna size in mobile terminals that support multiple communications standards and frequency bands, particularly for simultaneous voice and data processing, where two broadband multi-band antennas are required, occupying significant space.
Innovation Solution
A radio frequency front-end system with a control apparatus that connects the first radio frequency circuit to a second antenna if the selected frequency band is below a preset frequency, disconnecting the second radio frequency circuit from the second antenna, allowing the first antenna to handle only high-frequency signals, thereby reducing the size requirement of the first antenna.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two broadband multi-band antennas are used to support multiple communications standards and frequency bands, then the mobile terminal can achieve multi-network roaming and simultaneous voice and data processing, but the antenna size occupies large space
Solution Approach 1:
The patent segments the frequency spectrum into high-frequency bands and low-frequency bands, assigning different antenna elements to handle different frequency ranges. The first antenna element handles high-frequency signals while the second antenna element handles low-frequency signals, allowing each antenna to be smaller in size while collectively supporting multiple frequency bands and communication standards
Solution Approach 2:
The patent implements dynamic switching between different antenna elements based on the selected frequency band. The control apparatus dynamically selects which antenna element to use depending on whether the operating frequency is high or low, enabling the system to adapt to different communication standards and frequency bands while maintaining compact antenna dimensions
2Adaptability or versatility
If two broadband multi-band antennas are used for simultaneous voice and data processing, then SV-LTE and SG-LTE modes can be achieved, but the space requirement for antennas increases significantly
Solution Approach 1:
The patent divides the antenna system into multiple independent antenna elements, each optimized for specific frequency ranges. This segmentation allows the system to support simultaneous voice and data processing across different frequency bands without requiring large broadband antennas, thereby reducing the overall antenna volume in the mobile terminal
Solution Approach 2:
The control apparatus provides universal control over multiple antenna elements, enabling any antenna element to be assigned to different communication functions (voice or data) depending on the selected frequency band. This multi-functional control mechanism allows simultaneous voice and data processing while maintaining compact antenna dimensions
Data Source
AI summary
Embodiments disclose a radio frequency front-end system and a signal transmission control method. The system includes a first antenna, a second antenna, a first radio frequency circuit, a second radio frequency circuit, and a controller. The controller is configured to acquire a transmission frequency band selected by the first radio frequency circuit, and when a frequency in the transmission frequency band selected by the first radio frequency circuit is less than a preset frequency, to control the first radio frequency circuit to connect to the second antenna. The controller is further configured to disconnect a connection between the second radio frequency circuit and the second antenna, or to maintain an open circuit state between the second radio frequency circuit and the second antenna.