Programmable Power-Splitting Circuit for Dual-Input PA Phase Control
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Solution Overview
Problem
Existing dual-input power amplifiers face challenges in efficiently amplifying high peak-to-average-power-ratio (PAPR) signals due to limitations in phase reconfigurability and programmable power splitting.
Innovation Solution
A phase-reconfigurable circuit with programmable power splitting is introduced, which includes a single-ended-to-differential converter, an I/Q generation circuit, and vector-sum phase-shifters to process RF input signals, enabling flexible power splitting and phase shifting for improved amplification efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional dual-input power amplifiers are used, then amplification of high PAPR signals is achieved, but efficiency is reduced due to limitations in phase reconfigurability and programmable power splitting
Solution Approach 1:
The patent implements dynamic phase reconfigurability through vector-sum phase-shifters that can be programmed to different phase states, allowing the power amplifier to adapt its phase configuration in real-time according to signal conditions, thereby resolving the contradiction between fixed conventional designs and the need for dynamic efficiency optimization
Solution Approach 2:
The invention changes the operational parameters by introducing programmable power splitting ratios and adjustable phase shift values, enabling the amplifier to optimize its performance across different operating conditions and signal types, thus improving efficiency while maintaining adaptability
2Adaptability or versatility
If fixed power splitting is used in dual-input power amplifiers, then circuit complexity is reduced, but adaptability to different signal conditions deteriorates
Solution Approach 1:
The patent employs universal vector-sum phase-shifter circuits that can perform multiple functions including phase shifting, power splitting, and signal combining through programmable control, allowing a single circuit architecture to adapt to various signal conditions without requiring multiple dedicated circuits, thus achieving adaptability with controlled complexity
Solution Approach 2:
The invention achieves programmable power splitting by changing the control parameters of existing circuit elements rather than adding complex switching networks, allowing flexible power distribution ratios to be achieved through parameter adjustment of the phase-shifters, thereby maintaining circuit simplicity while enhancing adaptability
Data Source
AI summary
A phase-reconfigurable circuit with programmable power splitting for a dual-input power amplifier is provided. The circuit includes an I/Q generator to generate I and Q RF signals from an input RF signal. A first vector-sum phase-shifter processes the I and Q RF signals to produce a first RF output signal. Similarly, a second vector-sum phase-shifter processes the I and Q RF signals to produce a second RF output signal.