Shared Matching Inductor Circuit for Multi-Band RF Receivers
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Solution Overview
Problem
Existing multi-band radio frequency devices face challenges in efficiently managing space and cost due to the need for multiple impedance matching inductors and tuning inductors for each frequency band, which occupy significant space and increase costs.
Innovation Solution
Implementing a single impedance matching inductor and a single tuning inductor with switch configurations to replace multiple inductors, reducing space and cost by allowing a shared low noise amplifier and additional tuning capability through embedded traces on a multi-layer circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple impedance matching inductors and tuning inductors are used for each frequency band, then impedance matching and tuning performance for each band is optimized, but space requirements and device cost increase significantly
Solution Approach 1:
The patent implements a single impedance matching inductor that serves multiple frequency bands simultaneously, replacing what would traditionally require separate inductors for each band. This universal component approach maintains impedance matching performance across all bands while significantly reducing the total number of components and space required in the RF device
Solution Approach 2:
The patent combines multiple tuning inductors into a single shared tuning inductor that can be adjusted to provide optimal tuning for multiple frequency bands. By merging these components and using switching circuitry to select appropriate configurations, the patent reduces component count and space occupation while maintaining tuning effectiveness across all bands
2Reliability
If multiple impedance matching inductors and tuning inductors are used for each frequency band, then band-specific optimization is achieved, but device cost increases due to component quantity
Solution Approach 1:
The single impedance matching inductor is designed to provide effective impedance matching across multiple frequency bands, eliminating the need for multiple band-specific inductors. This universal component reduces bill of materials costs and simplifies manufacturing while maintaining performance optimization for each frequency band through careful circuit design and switching configurations
Solution Approach 2:
By combining multiple tuning inductors into a single shared component with switching capability, the patent reduces the total number of discrete components that need to be sourced, assembled, and tested. This merging approach lowers device cost while preserving the ability to optimize each frequency band's performance through the switching mechanism
3Area of stationary object
If a single impedance matching inductor is used for multiple frequency bands, then space requirements and cost are reduced, but impedance matching complexity increases
Solution Approach 1:
The patent employs switching circuitry that dynamically connects the single impedance matching inductor to different receive signal paths based on the active frequency band. This dynamic switching capability allows the static inductor component to effectively adapt to different impedance requirements across multiple bands, managing complexity through controlled switching rather than requiring multiple fixed inductors
Solution Approach 2:
The switching circuitry acts as an intermediary between the single impedance matching inductor and the multiple receive signal paths. This mediator selectively connects the inductor to the appropriate signal path based on the active frequency band, managing the complexity of multi-band impedance matching while maintaining a compact component structure
4Ease of manufacture
If multiple inductors are replaced by a single shared inductor, then component count and cost decrease, but tuning capability for each band must be maintained
Solution Approach 1:
The single shared tuning inductor is้ ๅ with switching circuitry that dynamically selects different configurations or connections for different frequency bands. This dynamic approach allows the single inductor to provide band-specific tuning capability, maintaining adaptability while reducing component count. The switching mechanism enables the system to adapt the inductor's effective value or connection topology to meet the tuning requirements of each active band
Data Source
AI summary
A multi-band radio frequency device uses a single matching inductor to provide matching impedance for multiple receivers, each operating over a different frequency band. The single matching inductor replaces individual matching inductors for each frequency band.