RF Transmission Circuit Dynamic Impedance Matching
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Solution Overview
Problem
Radio frequency transmission circuits face high power consumption due to inefficient impedance matching, especially when transmission powers are below maximum levels, leading to increased ACLR and amplifier current.
Innovation Solution
A radio frequency transmission circuit with a control unit that pre-stores correspondence relationships between transmission powers and matching loops, allowing dynamic adjustment of matching loops to optimize impedance matching and reduce power consumption by selecting the appropriate matching loop based on current transmission power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed matching circuit is used for the entire transmission power range, then the circuit structure is simple, but power consumption increases and impedance matching performance deteriorates at non-maximum transmission powers
Solution Approach 1:
The patent implements dynamic matching by switching between different matching circuits based on transmission power levels. The control unit selects appropriate matching circuits from multiple available circuits according to the current transmission power, transforming the static fixed matching structure into a dynamic adaptive structure that optimizes power consumption for each power level
Solution Approach 2:
The patent divides the transmission power range into multiple segments, each associated with a specific matching circuit. By segmenting the power range and assigning optimized matching circuits to each segment, the system achieves low power consumption across all power levels while maintaining manageable circuit complexity through modular design
2Device complexity
If a fixed matching circuit is used for the entire transmission power range, then the circuit structure is simple, but impedance matching performance deteriorates at non-maximum transmission powers
Solution Approach 1:
The control unit dynamically selects the most appropriate matching circuit based on real-time transmission power levels, ensuring optimal impedance matching performance across the entire power range. This dynamic adaptation prevents performance deterioration at non-maximum powers while maintaining a relatively simple overall circuit architecture
Solution Approach 2:
Different matching circuits are designed with specific optimizations for different power ranges. Each matching circuit has tailored component values and configurations optimized for its designated power segment, ensuring high impedance matching performance locally at each power level without requiring complex global optimization
3Use of energy by moving object
If dynamic matching adjustment is implemented, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The power range is divided into discrete segments with predetermined matching circuits for each segment. This segmentation approach reduces the complexity of continuous dynamic adjustment while still achieving significant power consumption reductions by selecting from a finite set of optimized matching circuits
Solution Approach 2:
Multiple matching circuits are pre-designed and pre-optimized for different power ranges before operation. The control unit simply needs to select from these pre-configured options based on current power levels, avoiding the complexity of real-time optimization calculations while achieving dynamic power consumption reduction
4Reliability
If dynamic matching adjustment is implemented, then impedance matching performance is improved, but device complexity increases
Solution Approach 1:
The impedance matching optimization is achieved by dividing the operation into discrete power segments, each with a dedicated matching circuit. This segmentation maintains high matching performance across all power levels while keeping the overall system complexity manageable through modular, pre-configured circuit blocks
Solution Approach 2:
Multiple matching circuits share common components and control infrastructure, allowing the system to achieve high impedance matching performance across different power levels without proportionally increasing overall complexity. The control unit provides universal selection functionality that manages multiple matching circuits through a unified interface
Data Source
AI summary
Disclosed in embodiments of the present disclosure are a radio frequency transmission circuit and circuit matching method. The radio frequency transmission circuit includes: a control unit and at least one transmission loop unit. The transmission loop unit includes at least one predetermined matching loop, and the control unit is pre-stored with a correspondence relationship between predetermined transmission powers and predetermined matching loops. The control unit is used to determine, according to the pre-stored correspondence relationship between the predetermined transmission powers and the predetermined matching loops, a predetermined matching loop corresponding to the received transmission power as a first matching loop, and control the first matching loop to operate. Also provided in the embodiments of the present disclosure is a computer storage medium.