Reconfigurable Push-Pull Power Amplifier for Multi-Band 5G RF
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Solution Overview
Problem
Existing radio frequency communication systems face challenges in efficiently supporting multiple frequency bands and bandwidths, particularly in 5G networks, due to the need for multiple active power amplifiers which increase board space and costs.
Innovation Solution
A reconfigurable push-pull power amplifier with controllable input and output capacitance, controlled by a band control signal, to selectively amplify radio frequency signals in different frequency bands, reducing the need for multiple power amplifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power amplifiers are used to support multiple frequency bands, then frequency band coverage is improved, but board space and system cost increase
Solution Approach 1:
The patent implements a single power amplifier that can operate across multiple frequency bands (e.g., 400 MHz to 7.125 GHz) by incorporating reconfigurable matching networks and controllable capacitance elements. This allows one amplifier to replace multiple amplifiers, each dedicated to a specific frequency band, thereby reducing board space while maintaining broad frequency band coverage
Solution Approach 2:
The patent employs dynamically reconfigurable input and output matching networks with controllable capacitance that can be adjusted in real-time based on the operating frequency band. This dynamic adaptation enables a single amplifier to efficiently operate across wide frequency ranges, eliminating the need for multiple static amplifiers for different bands
2Adaptability or versatility
If multiple power amplifiers are used to support multiple frequency bands, then frequency band coverage is improved, but system cost increases
Solution Approach 1:
The patent designs a universal power amplifier platform that can be manufactured as a single unit with reconfigurable capabilities, reducing the total component count and assembly complexity compared to deploying multiple separate amplifiers. This approach lowers system cost while maintaining the ability to support multiple frequency bands through software or control signal configuration
3Adaptability or versatility
If reconfigurable capacitance is implemented to support multiple frequency bands, then frequency band coverage is improved, but device complexity increases
Solution Approach 1:
The patent changes the electrical parameters (capacitance values) of the matching networks to adapt to different frequency bands. By using controllable capacitance elements that can be switched or tuned, the system achieves broad frequency band coverage without requiring physically different amplifier circuits for each band, managing complexity through parameter adjustment rather than structural multiplication
Data Source
AI summary
Apparatus and methods for reconfigurable power amplifiers are disclosed. In certain embodiments, a mobile device includes a transceiver configured to generate a first radio frequency signal of a first frequency band and a second radio frequency signal of a second frequency band, and a front-end system including a push-pull power amplifier configured to selectively amplify one of the first radio frequency signal or the second radio frequency signal based on a band control signal. The push-pull power amplifier includes an input balun, an output balun, and a pair of amplifiers coupled between the input balun and the output balun. The band control signal is operable to control an output capacitance of the pair of amplifiers.