Programmable RF Switch Network for Multi-Band LNA Routing
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Solution Overview
Problem
Designing wireless RF devices to operate in multiple frequency bands is challenging due to the need for multiple low noise amplifiers (LNAs), which increases cost and design complexity, while also requiring flexible signal routing and pin-outs to accommodate varying frequency specifications.
Innovation Solution
A programmable switch network that couples input lines from multiple frequency bands to an LNA bank, allowing signals to be routed without reconfiguring signal line layouts or unique pin-outs, using programmable RF switches to connect input terminals to multiple LNAs, enabling carrier aggregation and flexible frequency band management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple low noise amplifiers (LNAs) are used to operate in multiple frequency bands, then the system can support multiple frequency bands, but the cost and design complexity increase
Solution Approach 1:
A single LNA is designed to handle multiple frequency bands through a programmable switch network that dynamically routes different frequency bands to the same LNA. This makes the LNA universal across multiple bands, eliminating the need for separate LNAs for each band and thereby reducing design complexity while maintaining multi-band support
Solution Approach 2:
The system employs dynamic switching mechanisms where programmable RF switches reconfigure the signal path based on the active frequency band. This dynamic reconfiguration allows one LNA to serve multiple bands by adapting its input connections in real-time, reducing the total number of LNAs required and simplifying the overall design
2Adaptability or versatility
If multiple low noise amplifiers (LNAs) are used to operate in multiple frequency bands, then the system can support multiple frequency bands, but the cost increases
Solution Approach 1:
By designing a universal LNA that can operate across multiple frequency bands through programmable switching, the system reduces the total component count. Fewer LNAs mean lower component costs, reduced assembly complexity, and lower overall manufacturing expenses while maintaining the capability to support multiple frequency bands
3Adaptability or versatility
If signal line layouts are reconfigured for different frequency bands, then the system can accommodate varying frequency specifications, but the design time increases
Solution Approach 1:
The system uses programmable RF switches that can be software-controlled to reconfigure signal paths for different frequency bands. This dynamic switching capability allows the same physical layout to accommodate multiple frequency specifications without requiring manual redesign or reconfiguration of the signal line layouts, thereby significantly reducing design time while maintaining adaptability
4Adaptability or versatility
If unique pin-outs are created for different frequency bands, then the system can accommodate varying frequency specifications, but the design time and complexity increase
Solution Approach 1:
The system employs a universal pin-out configuration where the same physical pins and connectors are used across all frequency bands. Programmable switches internally route signals based on the active band, eliminating the need for band-specific pin-outs. This universal approach reduces design complexity and eliminates the time-consuming process of creating and managing multiple unique pin-out configurations
Data Source
AI summary
According to an embodiment, a circuit package includes a programmable switch component having a plurality of input terminals arranged on the programmable switch component, a plurality of output terminals arranged on the programmable switch component and configured to be coupled to a plurality of amplifiers, and a plurality of switches. Each switch of the plurality of switches is coupled between an input terminal of the plurality of input terminals and an output terminal of the plurality of output terminals. Each switch of the plurality of switches includes a radio frequency (RF) switch and is configured to pass an RF signal when closed. Each input terminal of the plurality of input terminals is coupled to two switches of the plurality of switches.