Switched RF Front End for Simultaneous Multi-Mode Signal Isolation
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Solution Overview
Problem
Existing wireless communication devices face challenges in efficiently supporting various simultaneous and asynchronous communication modes, such as dual band simultaneous (DBS), single band simultaneous (SBS), synchronous multi-link operation (MLO), and asynchronous MLO, due to the need for effective signal isolation and efficient filtering of different frequency bands.
Innovation Solution
The implementation of a radio frequency (RF) front end apparatus with switched xPlexers, diplexers, and transceivers that include filters and switches to selectively route RF signals to antennas, allowing for simultaneous and asynchronous communication modes by using high-Q and lower-Q filter technologies to separate and combine different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional RF front end configurations are used, then the device can support basic communication modes, but it cannot efficiently support multiple simultaneous communication modes (DBS, SBS, MLO) due to limitations in antenna configuration and filter technology
Solution Approach 1:
The RF front end implements multi-functionality by enabling a single system to support multiple communication modes (DBS, SBS, synchronous MLO, asynchronous MLO) through configurable switchable diplexers and filter banks. The same hardware infrastructure can be dynamically reconfigured to handle different communication scenarios without requiring separate dedicated paths for each mode.
Solution Approach 2:
The system employs dynamic reconfiguration capabilities through switchable diplexers that can change their connectivity state based on the required communication mode. The filter banks are dynamically selected and switched to match the operational requirements, allowing the system to adapt in real-time between different communication scenarios.
2Reliability
If more antennas are added to support various communication modes, then signal isolation and data throughput improve, but the device complexity and antenna requirements increase
Solution Approach 1:
The patent merges multiple communication functions into shared antenna paths using switchable diplexers. Instead of dedicating separate antennas to each communication mode, the system combines multiple modes and shares antenna resources through time-division and frequency-division multiplexing enabled by the switchable diplexer architecture.
Solution Approach 2:
Switchable diplexers serve as intermediary components between the transceivers and antennas. These diplexers mediate the signal paths by selectively connecting different transceiver-antenna pairs based on the required communication mode, providing signal isolation and interference protection without requiring additional antennas.
3Productivity
If filter banks are added to enable flexible routing of RF signals, then data throughput and communication mode flexibility improve, but device complexity increases
Solution Approach 1:
The filter system is segmented into multiple filter banks, each optimized for specific frequency ranges or communication modes. This segmentation allows parallel processing of different frequency signals through dedicated filter paths, improving data throughput while maintaining manageable complexity through modular organization.
Solution Approach 2:
The system changes operational parameters by selecting different filter banks based on the required communication mode. The switchable diplexers and filter banks are configured with specific frequency responses and routing parameters that are dynamically adjusted to match the operational requirements of DBS, SBS, or MLO modes.
Data Source
AI summary
The apparatus includes a first xPlexer, coupled to a first antenna, including first and second filters; a second xPlexer, coupled to a second antenna, including third and fourth filters; a first switched xPlexer including fifth and sixth filters coupled to the second filter of the first xPlexer; a second switched xPlexer including seventh and eighth filters coupled to the fourth filter of the second xPlexer; a first transceiver coupled to the first filter of the first xPlexer and selectively coupled to the fifth filter of the first switched xPlexer; a second transceiver coupled to the third filter of the second xPlexer and selectively coupled to the seventh filter of the second switched xPlexer; a third transceiver selectively coupled to either the fifth or sixth filter of the first switched xPlexer; and a fourth transceiver selectively coupled to the seventh or eighth filter of the second switched xPlexer.