Envelope Tracking Power Amplifier Sharing Across 4G and 5G Bandwidths
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Solution Overview
Problem
Electronic devices with wireless communications functions face challenges in power consumption and space constraints due to the need for multiple power amplifiers and envelope tracking modulators to support various bandwidths, particularly with the introduction of 5G technology, which requires higher power and wider frequency bands.
Innovation Solution
A wireless communications system that utilizes a shared power supply circuit with an envelope tracking modulator to power multiple power amplifier circuits with different bandwidths, adjusting inductance values and enabling/disabling connections based on bandwidth requirements to optimize efficiency and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power amplifier circuits and envelope tracking modulators are used to support various bandwidths, then the adaptability to different communications technologies is improved, but the device complexity and space occupation increase
Solution Approach 1:
The patent applies universality by designing a single power amplifier circuit that can operate across multiple bandwidth ranges (first bandwidth range for 4G, second bandwidth range for 5G) through dynamic configuration of inductance values and switching between different working modes, eliminating the need for separate power amplifiers for different communication standards
Solution Approach 2:
The patent implements dynamics by making the inductance values adjustable and reconfigurable based on the operating bandwidth requirements. The inductance values are dynamically changed between a first set (for 4G) and a second set (for 5G), allowing the same hardware to adapt to different communication technologies without physical redesign
2Adaptability or versatility
If multiple power amplifier circuits and envelope tracking modulators are used to support various bandwidths, then the adaptability to different communications technologies is improved, but the area occupied on the printed circuit board increases
Solution Approach 1:
The patent merges multiple previously separate circuits (4G power amplifier, 5G power amplifier, multiple envelope tracking modulators) into a single integrated power amplifier circuit with unified control. This consolidation reduces the total component count and frees up significant space on the printed circuit board while maintaining support for both 4G and 5G bandwidth requirements
Solution Approach 2:
The single power amplifier circuit is designed to universally support both 4G and 5G frequency bands and bandwidth requirements through dynamic inductance adjustment and mode switching, replacing multiple dedicated circuits and reducing overall board space occupation
3Reliability
If high output power is transmitted to maintain sufficient energy per bit, then the communication quality is improved, but the power consumption increases
Solution Approach 1:
The patent changes the inductance parameter dynamically based on bandwidth requirements - using a first inductance value for 4G operations and a second inductance value for 5G operations. This parameter adjustment optimizes the power amplifier's efficiency at different operating points, allowing high output power when needed while minimizing power consumption during lower power requirements
Data Source
AI summary
A wireless communications system is provided. A power supply circuit in the wireless communications system includes an envelope tracking modulator, and the envelope tracking modulator may be coupled to a first power amplifier circuit and a second power amplifier circuit, so that the power supply circuit supplies power to the first power amplifier circuit and the second power amplifier circuit. When a transmit signal that is output by a processor meets a first bandwidth range, the power supply circuit supplies power to the first power amplifier circuit, and the first power amplifier circuit amplifies power of the transmit signal. When the transmit signal that is output by the processor meets a second bandwidth range, the power supply circuit supplies power to the second power amplifier circuit, and the second power amplifier circuit amplifies the transmit signal.