RF Receiver Switch Assembly for Low-Loss Carrier Aggregation
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Solution Overview
Problem
Existing radio frequency receiving systems face challenges in optimizing insertion loss when implementing carrier aggregation (CA) combinations of different quantities, particularly when additional band signals require external filters and LNAs, leading to longer connection lines and increased insertion loss.
Innovation Solution
A radio frequency receiving system with a switch assembly that can switch between states to connect internal and external amplifiers and filters, allowing flexible integration and utilization of amplifiers to handle various CA combinations, reducing unnecessary insertion loss and optimizing signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external filters and LNAs are added to implement CA combinations with more bands, then the system can support more carrier aggregation combinations, but the insertion loss increases due to longer connection lines
Solution Approach 1:
The patent merges the external filter and LNA into a single integrated module that connects to the receive module through a shorter path. This integration allows the system to support extended CA combinations while minimizing the connection line length, thereby reducing insertion loss compared to using separate external components.
Solution Approach 2:
The patent introduces an intermediary integrated module that acts as a bridge between the receive module and the external filter/LNA combination. This intermediary structure optimizes the signal path, reducing the effective connection length and insertion loss while maintaining support for multiple CA combinations.
2Reliability
If multiple receive modules are used to receive signals from different antennas, then isolation between antennas is improved, but the distance between receive modules increases, resulting in longer connection lines and larger insertion loss when borrowing LNAs
Solution Approach 1:
The patent merges the filter and LNA functions into a single integrated module that can be positioned closer to the receive module. This reduces the distance between components and minimizes insertion loss, while the system architecture maintains proper antenna isolation through the distributed receive module structure.
3Device complexity
If LNAs are integrated into one receive module to implement common CA combinations, then device complexity is reduced, but the system cannot support CA combinations requiring more bands without external components
Solution Approach 1:
The patent creates a universal integrated module that combines filter and LNA functions, designed to work with multiple receive module configurations. This multi-functional module can support various CA combinations including extended bands while maintaining a consistent level of integration and not significantly increasing device complexity.
Data Source
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AI summary
This application provides a radio frequency receiver, a radio frequency receiving system, and an electronic device, to resolve a problem of how to optimize an insertion loss when implementing CA combinations of different quantities. A radio frequency receiving system of the electronic device includes a first radio frequency receiver. The first radio frequency receiver includes at least one first port, a first selector switch, a plurality of first filters, a plurality of second selector switches, a plurality of first amplifiers, two second ports, and a switch assembly. The first selector switch and the second selector switches can select to connect at least one signal transmission link in the first radio frequency receiver. When the first radio frequency receiver receives band signals whose quantity is less than or equal to a quantity of first amplifiers and the band signals include a band signal gated by a second filter discretely arranged outside the first radio frequency receiver, the switch assembly can ensure that the band signals each can be transmitted from the first radio frequency receiver to a processing circuit of the electronic device, and a signal transmission path is short, thereby optimizing the insertion loss.