Weakly Coupled Tunable RF Receiver for Multi-Band Front-End Simplification
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Solution Overview
Problem
Existing RF communications systems face challenges in achieving flexibility, efficiency, and cost-effectiveness due to the need for complex switching and duplexing components to support multiple communications protocols and bands, which increases size, power consumption, and non-linearity.
Innovation Solution
The implementation of a tunable RF filter structure using weakly coupled resonators that eliminates the need for front-end RF switching elements by directly coupling multiple filter paths to a common connection node, allowing for impedance matching and noise filtering while reducing size and non-linearity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex switching and duplexing components are used to support multiple communications protocols and bands, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal RF front-end architecture where a single set of resonators and filter paths can handle multiple communications protocols and bands. The tunable resonators are configured to operate across different frequency ranges, eliminating the need for separate switching networks and duplexers for each protocol, thereby achieving multi-functionality without increasing device complexity
Solution Approach 2:
The patent merges the functions of multiple filter paths into a unified resonator structure. By combining multiple resonators into a shared tank circuit with common inductors and capacitors, the design integrates what would traditionally require separate switching and duplexing components into a single cohesive structure, reducing overall system complexity while maintaining support for multiple protocols
2Adaptability or versatility
If complex switching and duplexing components are used to support multiple communications protocols and bands, then adaptability is improved, but size increases
Solution Approach 1:
The patent merges multiple filter paths into a unified resonator structure where inductors and capacitors are shared across different protocol paths. This consolidation eliminates the need for separate physical components for each communication standard, significantly reducing the overall area required for the RF front-end circuitry while maintaining multi-protocol support
Solution Approach 2:
The resonators are designed as universal structures that can be tuned to operate across multiple frequency bands and protocols. This multi-functionality allows a single set of physical components to replace what would traditionally require multiple separate component sets, thereby reducing the total area occupied by the RF front-end
3Adaptability or versatility
If complex switching and duplexing components are used to support multiple communications protocols and bands, then adaptability is improved, but power consumption increases
Solution Approach 1:
The patent merges multiple filter paths into a single shared resonator structure, eliminating the need for active switching components that would consume power to route signals between different protocols. The passive nature of the shared inductors and capacitors means no additional power is required to support multiple communications standards, reducing overall power consumption while maintaining adaptability
4Adaptability or versatility
If complex switching and duplexing components are used to support multiple communications protocols and bands, then adaptability is improved, but non-linearity increases
Solution Approach 1:
The patent merges multiple filter paths into a unified passive resonator structure, eliminating active switching components that introduce non-linearity into the RF signal path. The passive inductors and capacitors in the shared tank circuit maintain linear operation across all supported protocols, reducing harmful non-linear effects while preserving adaptability to multiple communications standards
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the flexibility and efficiency of RF communications systems by enabling simultaneous transmission and reception across multiple bands without the need for complex switching, thereby reducing size, power consumption, and non-linearity, while maintaining effective filtering characteristics.
Implementation Method 1
a first tunable RF filter path (66) and a second tunable RF filter path (68), each of which includes a pair of weakly coupled resonators
Data Source
AI summary
RF communications circuitry, which includes a first tunable RF filter and a first RF low noise amplifier (LNA) is disclosed. The first tunable RF filter includes a pair of weakly coupled resonators, and receives and filters a first upstream RF signal to provide a first filtered RF signal. The first RF LNA is coupled to the first tunable RF filter, and receives and amplifies an RF input signal to provide an RF output signal.