Band-Switched RF Amplifier Matching Across Multiple Frequency Bands
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current RF devices face performance degradation when supporting multiple frequency bands due to the use of wideband amplifiers, which is costly and inefficient, as they require large physical size and reduced power output and efficiency.
Innovation Solution
A configurable RF amplifier arrangement that can be tuned for specific frequency bands, combined with a band switch to selectively couple the amplifier to narrow band filters, allowing for improved impedance matching and performance across multiple bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wideband amplifiers are used to support multiple frequency bands, then the number of amplifiers is reduced, but performance (power output and efficiency) is degraded
Solution Approach 1:
The patent divides the system into multiple narrowband amplifiers, each optimized for a specific frequency band, rather than using a single wideband amplifier. This segmentation allows each amplifier to operate at peak efficiency for its designated band while collectively supporting multiple bands through the band switch.
Solution Approach 2:
The patent introduces a band switch that dynamically connects different amplifiers to the antenna based on the selected frequency band. This dynamic switching mechanism enables the system to adapt to different operating conditions and maintain optimal performance across multiple bands.
2Power
If band-specific narrow band amplifiers are used for each frequency band, then performance is improved, but cost and physical size increase
Solution Approach 1:
The patent creates a multi-functional system where multiple amplifiers share a common output path through the band switch. Each amplifier is specialized for a specific band, but the overall system serves multiple bands universally, reducing redundant components and managing physical size.
Solution Approach 2:
The patent combines multiple narrowband amplifiers and narrowband filters into a unified system with a shared output path controlled by a band switch. This merging approach allows the system to achieve the performance benefits of band-specific amplifiers while managing complexity through integration.
3Area of stationary object
If wideband amplifiers are used, then physical size is reduced, but impedance matching performance deteriorates
Solution Approach 1:
The patent applies local quality optimization by designing each narrowband amplifier and its associated filter with impedance matching specifically tailored to its frequency band. This localized optimization ensures optimal impedance matching for each band while maintaining a compact overall system through the shared output path.
Data Source
AI summary
Methods and devices for tuning a configurable amplifier of a multi-band RF front-end stage based on a setting of a band switch are described. A lookup table provided with the configurable amplifier is used to map configuration control data of the band switch to configuration control data of the configurable amplifier. The configurable amplifier can be part of a transmit path or a receive path of the multi-band RF front-end stage.