Single-Board RF Switch Layout for Seamless Transponder Selection
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Solution Overview
Problem
Current high-end commercial satellite receivers are limited to tuning to only one satellite transponder between 950 MHz and 2150 MHz at a time, preventing seamless switching between transponders.
Innovation Solution
An 8×2 radio frequency switch with a compact single-board layout, featuring multiple input and output ports that independently select signal paths, allowing seamless switching between satellite transponders, and incorporating gallium-arsenide monolithic microwave integrated circuit (MMIC) switches for high isolation and low intermodulation products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an 8×1 RF switch configuration is used, then the device complexity is reduced, but the adaptability is limited to only one transponder at a time
Solution Approach 1:
The patent divides the RF switching function into multiple independent output ports (8×2 configuration with two output ports), allowing each port to independently select from multiple input ports. This segmentation enables simultaneous or sequential access to multiple transponders, resolving the limitation of single-transponder tuning while maintaining manageable device complexity through modular architecture
Solution Approach 2:
The RF switch is designed with multi-functionality to handle multiple transponder signals through a single device. The 8×2 configuration allows the switch to route signals from eight different transponder inputs to two different output destinations, providing universal access to multiple satellites and transponders without requiring separate switching devices for each function
2Adaptability or versatility
If multiple RF switches are used to enable seamless transponder switching, then the adaptability improves, but the device complexity and receiver space increase
Solution Approach 1:
The patent merges multiple RF switching functions into a single integrated 8×2 RF switch device. By combining the functionality of what would traditionally require multiple separate switches into one unified component, the design achieves seamless transponder switching capability while conserving receiver space and reducing the overall footprint of the satellite receiver system
3Object-affected harmful factors
If traditional RF switches are used, then the device size is reduced, but the isolation between signal paths and intermodulation products increase
Solution Approach 1:
The patent employs gallium-arsenide monolithic microwave integrated circuit (MMIC) switches, which utilize composite material properties of gallium-arsenide semiconductor technology. This material choice provides superior electrical characteristics including higher isolation between signal paths and lower intermodulation products compared to traditional switch implementations, while maintaining a compact form factor through monolithic integration
Data Source
AI summary
Embodiments of the invention generally provide a radio frequency switch, for example for use in a satellite receiver. The switch includes a plurality of input ports and a plurality of output ports, where output ports independently select signal paths from any of the input ports. The entire switch is embodied in a compact single-board layout. In another embodiment, a satellite receiver includes at least one antenna for receiving a signal from a satellite transponder and a radio frequency switch for selecting the satellite transponder from among a plurality of satellite transponders.