Antenna Switch Diversity in RF Front End Architectures
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Solution Overview
Problem
Current wireless devices face challenges in efficiently managing concurrency of multiple radio frequency (RF) systems, particularly in providing antenna diversity while minimizing the number of Front End components and optimizing antenna utilization in RF Front End (RFFE) architectures.
Innovation Solution
The method involves selecting an antenna for transmission from a default antenna and other available antennas using antenna switch diversity (ASDIV) and configuring switches to couple radio components to the selected antenna during transmission cycles, while reverting to the default antenna for reception cycles, thereby reducing the number of transmission lines and optimizing antenna usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antennas are used for each radio system to provide antenna diversity, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the antenna resources of the first and second radio systems by allowing them to share common antennas through time-division multiplexing. The antenna switch dynamically connects the shared antenna pool to either the first or second radio system based on transmission cycles, enabling both systems to achieve antenna diversity without requiring dedicated antennas for each system.
Solution Approach 2:
The patent implements universality by designing a shared antenna pool that serves multiple radio systems. The same set of antennas can be dynamically allocated to different radio systems (first radio system, second radio system) depending on the transmission cycle, making the antenna infrastructure multi-functional and reducing the total number of antennas needed.
2Reliability
If dedicated antennas are allocated to each radio system, then reliability is improved, but the number of transmission lines increases
Solution Approach 1:
The patent combines the transmission line infrastructure by using a shared antenna pool and dynamic switching mechanism. Instead of having separate dedicated transmission lines from each radio system to separate antennas, the system uses a common antenna pool accessed through time-division multiplexing, significantly reducing the total number of transmission lines required.
Solution Approach 2:
The patent introduces an antenna switch as an intermediary component that manages the connection between radio systems and the shared antenna pool. This switch acts as a mediator that dynamically routes signals from either the first or second radio system to the appropriate antennas during transmission cycles, enabling resource sharing while maintaining system independence.
3Productivity
If antenna switching is implemented dynamically, then antenna utilization is improved, but device complexity increases
Solution Approach 1:
The patent implements periodic action through time-division multiplexing, where the antenna switch dynamically allocates the shared antenna pool to different radio systems in periodic transmission cycles. During each cycle, the switch connects the antenna pool to the active transmitting radio system, enabling efficient antenna utilization while maintaining a relatively simple switching control mechanism based on time-division principles.
Data Source
AI summary
Disclosed aspects relate to methods and apparatus for controlling a wireless device having at least one radio frequency (RF) system. The methods and apparatus are configured to select an antenna for transmission of signals from radio components of the at least one RF system from between a first default antenna normally coupled to the radio components of the at least one RF system for transmission of signals and one of a plurality of other antennas in the wireless device. Further, switching is configured to couple the radio components to one of the other plurality of antennas selected as the antenna for transmission cycles when the radio components are transmitting in an antenna switch diversity (ASDIV) period. Additionally, the methods and apparatus are configured to operate a switch to couple the radio components back to at least the first default antenna during receiving cycles during the ASDIV period.