RF Tuning Module With Adaptive Impedance Matching
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Solution Overview
Problem
Conventional electronic devices face performance limitations and current loss due to relaxed linearity requirements in communication networks, leading to suboptimal performance under varying conditions.
Innovation Solution
The electronic device incorporates a power amplifier, a matching circuit, and a control circuit that adjust impedance and bias states based on the connected network, optimizing linearity and efficiency by selecting appropriate impedance values and power modes to meet specific network requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circuit is designed to operate under any possible conditions to satisfy all communication network requirements, then the linearity performance is improved, but the current consumption increases
Solution Approach 1:
The patent applies dynamics by making the impedance matching network adjustable rather than fixed. The network can dynamically change its impedance values based on the operating conditions and network requirements, allowing the system to optimize between linearity performance and current consumption for different scenarios such as power amplification modes or communication standards.
Solution Approach 2:
The patent changes the impedance parameters of the matching network adaptively. By adjusting the impedance values of the matching network components, the system can optimize the trade-off between linearity and efficiency for different operating conditions, avoiding the need to maintain high linearity performance under all conditions which would increase current consumption.
2Device complexity
If the impedance matching network uses fixed impedance values, then the device complexity is reduced, but the adaptability to different network conditions deteriorates
Solution Approach 1:
The patent transforms the static impedance matching network into a dynamic one by introducing adjustable elements. This allows the network to adapt its impedance characteristics to different network conditions and operating modes while maintaining a relatively simple overall structure through controlled adjustability rather than multiple fixed networks.
Solution Approach 2:
The patent creates a universal impedance matching network that can serve multiple functions and adapt to different network conditions through a single adjustable structure. This multi-functional design eliminates the need for separate matching networks for different scenarios, reducing overall device complexity while improving adaptability.
3Reliability
If the matching network is adjusted frequently to optimize performance, then the linearity performance is improved, but the risk of damaging the power amplifier increases
Solution Approach 1:
The patent applies preliminary action by adjusting the impedance matching network before changing the operating state of the power amplifier. This preparatory adjustment ensures that the amplifier operates under optimal conditions from the start, avoiding transient conditions that could cause damage during state transitions.
Solution Approach 2:
The patent provides beforehand cushioning by carefully controlling the adjustment process of the impedance matching network. The system manages the transition process to prevent abrupt changes that could generate harmful transients, thereby protecting the power amplifier from damage while still achieving optimal linearity performance.
Data Source
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AI summary
Disclosed is an electronic device including a power amplifier (PA) configured to amplify a transmission signal, a matching circuit configured to be connected with the PA and to form a load impedance, a filter configured to be connected with the matching circuit, and a control circuit configured to control a state of at least one of a bias of the PA, the matching circuit, and the filter. The control circuit may identify a network to which the electronic device is connected among a first network and a second network and may operate the matching circuit in one of a first state, a second state, and a third state based on the identified network.