High-Frequency Transceiver Circuit for Multi-Standard Mobile Devices
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Solution Overview
Problem
Current mobile communication devices face challenges in accommodating multiple communication systems such as 5G NR, LTE, and satellite positioning systems within a compact size, requiring efficient front-end circuits that can coexist and reduce component count.
Innovation Solution
A high-frequency-signal transceiver circuit design that integrates multiple antenna terminals and RFICs, utilizing multiplexers and filters to manage signals across various frequency bands, enabling 4×4 MIMO communication and reducing the number of circuit components, thereby minimizing device size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple communication systems (5G NR, LTE, satellite positioning) are integrated into a single device, then communication functionality and versatility are improved, but device size and circuit complexity increase
Solution Approach 1:
The patent combines multiple communication systems (5G NR, LTE, satellite positioning) into a single integrated front-end circuit. Multiple antenna terminals (first to fourth antenna terminals) are connected to a shared high-frequency circuit through multiplexers, allowing different communication functions to coexist in a compact structure. This merging approach enables the device to support diverse communication standards while reducing the overall circuit area compared to separate dedicated circuits for each system.
Solution Approach 2:
The high-frequency circuit is designed with universal functionality to handle multiple communication protocols simultaneously. The circuit can process 5G NR signals, LTE signals, and satellite positioning signals through a common architecture. The multiplexers dynamically connect different antenna terminals to the high-frequency circuit based on the active communication mode, enabling one circuit to serve multiple purposes and reducing the need for separate dedicated circuits.
2Reliability
If separate front-end circuits are used for each communication system, then signal quality and reliability are improved, but device size and component count increase
Solution Approach 1:
The patent employs dynamic switching mechanisms through multiplexers that can reconfigure circuit connections based on the active communication mode. The multiplexers dynamically connect or disconnect antenna terminals to the high-frequency circuit depending on whether 5G NR, LTE, or satellite positioning is active. This dynamic reconfiguration allows a single circuit to maintain signal quality for different communication systems without requiring separate dedicated circuits for each, thereby reducing overall complexity while preserving reliability.
3Productivity
If multiple antenna terminals are connected to separate RFICs, then communication performance is improved, but the number of components and device cost increase
Solution Approach 1:
The patent merges multiple antenna terminals (first to fourth antenna terminals) into a single high-frequency circuit through multiplexers. Instead of connecting each antenna terminal to a separate RFIC, the multiplexers allow multiple antennas to share the same high-frequency circuit resources. This consolidation reduces the number of RFIC components needed while maintaining the ability to support MIMO communications and multiple communication standards, thereby reducing component count and device cost.
Data Source
AI summary
First to fourth circuits are connected to corresponding first to fourth antenna terminals. The first to fourth circuits transmit and receive a signal of TDD and a signal of FDD. The first to fourth circuits transmit and receive a signal of MIMO. The third circuit receives a signal of a satellite positioning system. The lower limit of the frequency of the signal received by the third circuit and the fourth circuit is higher than the lower limit of the frequency of the signal received by the first circuit and the second circuit.