Weakly Coupled RF Network Power Amplifier Architecture
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Solution Overview
Problem
Current RF communications devices face challenges in being low cost, small, simple, flexible, and efficient due to the need for complex RF circuitry that supports multiple wireless protocols with specific performance requirements, while also minimizing size and power consumption.
Innovation Solution
The implementation of a first group of RF power amplifier circuits coupled with a weakly coupled RF network, which includes pairs of weakly coupled RF resonators to process RF signals, allowing for tunable RF filter paths that are independent and do not significantly load each other, thereby reducing the need for front-end switching elements and enhancing efficiency and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex RF circuitry is used to support multiple wireless protocols, then protocol compatibility is improved, but device complexity and size increase
Solution Approach 1:
The weakly coupled RF resonator network is designed to perform multiple functions across different frequency bands and wireless protocols (FDD, TDD, carrier aggregation) simultaneously. The same resonator structure handles both filtering and impedance matching for multiple protocols, eliminating the need for separate circuitry for each protocol.
Solution Approach 2:
The RF circuitry is segmented into independent weakly coupled resonator pairs, where each pair operates semi-independently at different frequency bands. This segmentation allows each resonator pair to be optimized for specific frequency ranges while maintaining overall system flexibility for multiple protocols.
2Adaptability or versatility
If front-end switching elements are added to support multiple frequency bands, then frequency band flexibility is improved, but device size and loss increase
Solution Approach 1:
The weakly coupled resonator network provides universal frequency band support through its inherent multi-resonance characteristics. Each resonator pair can be tuned to operate at different frequency bands without requiring physical switching elements, thereby supporting FDD, TDD, and carrier aggregation modes within the same structural footprint.
Solution Approach 2:
The patent merges the functions of multiple frequency band filters and switching elements into a single weakly coupled resonator network. This consolidation eliminates the need for separate front-end switching elements and multiple discrete filters, reducing overall device size while maintaining frequency band flexibility.
3Adaptability or versatility
If front-end switching elements are added to support multiple frequency bands, then frequency band flexibility is improved, but energy loss increases
Solution Approach 1:
The patent merges the functions of multiple frequency band filters and switching elements into a single weakly coupled resonator network. This consolidation eliminates the need for separate front-end switching elements and multiple discrete filters, reducing overall device size while maintaining frequency band flexibility.
Solution Approach 2:
The patent extracts and eliminates the front-end switching elements from the traditional RF front-end architecture. By removing these lossy switching components and replacing them with the weakly coupled resonator network, signal loss is reduced while frequency band flexibility is maintained through the resonators' inherent multi-frequency operation capability.
4Manufacturing precision
If tightly coupled RF resonators are used, then filtering performance is improved, but mutual loading between filter paths increases
Solution Approach 1:
The patent applies local quality by creating weak coupling between resonator pairs, where each pair maintains strong internal coupling for sharp filtering at its designated frequency, while the inter-pair coupling is deliberately weakened to minimize mutual loading. This localized quality control allows each resonator pair to operate with high selectivity without significantly affecting other frequency bands.
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 reduces cost, size, and non-linearity while increasing efficiency and flexibility, enabling support for various wireless protocols and frequency bands without interfering RF signals, suitable for applications like FDD, TDD, and carrier-aggregation systems.
Implementation Method 1
a first weakly coupled RF network including a first pair of weakly coupled RF resonators coupled to the first RF power amplifier circuit and a second pair of weakly coupled RF resonators coupled to the second RF power amplifier circuit
Data Source
AI summary
RF communications circuitry, which includes a first group of RF power amplifier circuits and a first weakly coupled RF network, is disclosed. The first group of RF power amplifier circuits includes a first RF power amplifier circuit, which receives and amplifies a first RF amplifier input signal to provide a first RF amplifier output signal, and a second RF power amplifier circuit, which receives and amplifies a second RF amplifier input signal to provide a second RF amplifier output signal. The first weakly coupled RF network includes a first pair of weakly coupled RF resonators coupled to the first RF power amplifier circuit and a second pair of weakly coupled RF resonators coupled to the second RF power amplifier circuit.