RF Module Switching Between Power-Class Signal Paths
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Solution Overview
Problem
Conventional radio frequency circuits experience signal quality and power efficiency deterioration when multiple power classes are used in a predetermined frequency band.
Innovation Solution
A radio frequency circuit design that includes separate first and second radio frequency circuits, each supporting different power classes, with dedicated power amplifier and filter circuits, and switch circuits to switch between them based on the power class, allowing for optimal signal amplification and filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single radio frequency circuit is used to support multiple power classes in a predetermined frequency band, then device complexity is reduced, but signal quality and power efficiency deteriorate
Solution Approach 1:
The radio frequency circuit is segmented into multiple independent circuits (first radio frequency circuit for first power class, second radio frequency circuit for second power class). Each circuit is optimized for its specific power class, preventing signal quality deterioration that would occur in a single circuit handling multiple power classes simultaneously.
Solution Approach 2:
Each radio frequency circuit is designed with local quality optimization - the first radio frequency circuit has components optimized for first power class characteristics, while the second radio frequency circuit has components optimized for second power class characteristics. This ensures each circuit operates at peak performance for its designated power class.
2Ease of manufacture
If a single radio frequency circuit supports multiple power classes, then manufacturing cost is reduced, but power efficiency deteriorates
Solution Approach 1:
The power amplification function is segmented into separate power amplifier circuits within each radio frequency circuit. The first power amplifier circuit operates efficiently at first power class power levels, while the second power amplifier circuit operates efficiently at second power class power levels, preventing efficiency loss from operating outside optimal ranges.
Solution Approach 2:
Each power amplifier circuit is designed with local quality characteristics matched to its power class - including optimized transistor sizes, biasing conditions, and matching networks. This ensures maximum power efficiency for each power class without compromising the other.
3Reliability
If separate radio frequency circuits are used for different power classes, then signal quality and power efficiency improve, but device complexity increases
Solution Approach 1:
The first and second filter circuits both support the first band, making them universal for that frequency range. This allows the system to use multiple specialized circuits while maintaining compatibility and reducing overall system complexity through standardized filter designs.
Solution Approach 2:
The first radio frequency circuit and second radio frequency circuit are combined within a single radio frequency device, with their respective filter circuits and switch circuits integrated into a unified architecture. This reduces the practical complexity increase while maintaining the performance benefits of separate optimized circuits.
4Use of energy by moving object
If separate radio frequency circuits are used for different power classes, then power efficiency improves, but device complexity increases
Solution Approach 1:
The filter circuits are designed with universal characteristics for the first band, allowing them to be used across different power class circuits. This standardization reduces the complexity burden of having multiple specialized circuits while maintaining power efficiency through optimized filter designs for each power class.
Solution Approach 2:
Multiple radio frequency circuits are merged into a single integrated device with shared components where possible (such as common filter banks and switch matrices). This consolidation reduces the practical complexity increase while preserving the power efficiency benefits of having separate optimized power amplification paths.
Data Source
AI summary
A radio frequency circuit includes a first radio frequency circuit, a second radio frequency circuit, and a first switch circuit. The first switch circuit includes a first terminal connected to an antenna connection terminal, a second terminal connected to the first radio frequency circuit, and a third terminal connected to the second radio frequency circuit. The first radio frequency circuit includes a first power amplifier circuit supporting a first power class, and a first filter circuit connected to the first power amplifier circuit and having a passband that includes a first band. The second radio frequency circuit includes a second power amplifier circuit supporting a second power class having a maximum output power greater than a maximum output power of the first power class. The second radio frequency circuit includes a second filter circuit connected to the second power amplifier circuit and having a passband that includes the first band.