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 complexity, and requires re-routing of signal lines and unique pin-outs for different frequency bands.
Innovation Solution
A programmable switch network couples input lines from multiple frequency bands to an LNA bank, allowing signals to be routed without re-configuring signal line layouts or using unique pin-outs, enabling efficient operation across various frequency bands by using programmable switches to connect input lines to the appropriate LNAs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple LNAs are used to operate in multiple frequency bands, then the wireless system can support more frequency bands, but the cost and design complexity increase
Solution Approach 1:
The patent implements a universal LNA design that can operate across multiple frequency bands (e.g., 700 MHz to 3.5 GHz) by integrating programmable switching networks and variable matching networks. This single LNA replaces multiple dedicated LNAs, reducing design complexity while maintaining multi-band support. The programmable switch component allows dynamic reconfiguration of the LNA's input and output matching networks to adapt to different frequency bands.
2Adaptability or versatility
If multiple LNAs are used to operate in multiple frequency bands, then the wireless system can support more frequency bands, but the cost increases
Solution Approach 1:
The patent merges multiple LNA functions into a single integrated LNA circuit by combining programmable switch components, variable matching networks, and a unified amplification stage. This consolidation reduces the total component count, simplifies manufacturing, and lowers cost while maintaining the capability to support multiple frequency bands through programmable reconfiguration.
3Adaptability or versatility
If signal lines are re-routed for different frequency bands, then the system can accommodate various frequency bands, but the layout design time and challenge increase
Solution Approach 1:
The patent employs dynamic reconfiguration of signal paths using programmable switch components that can be controlled via software or control signals. Instead of requiring physical re-routing of signal lines for different frequency bands, the system dynamically switches between pre-configured signal paths within the integrated circuit, dramatically reducing layout design time and complexity while maintaining frequency band adaptability.
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.