Shared Final-Stage RF Amplifier With Filter Matching to Block Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing high frequency modules face issues with increased size due to large final stage amplification units and unwanted wave leakage between power amplifiers.
Innovation Solution
A high frequency module design incorporating a single final stage amplification unit shared by two power amplifiers, with filter-type matching circuits to suppress unwanted wave leakage and enable downsizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate final stage amplification units are provided for each power amplifier, then each power amplifier can operate independently, but the module size increases
Solution Approach 1:
The patent combines two separate final stage amplification units into a single shared final stage amplification unit that can amplify signals for both first and second communication bands. This merging reduces the overall number of components and decreases module size while maintaining the capability to handle multiple frequency bands through selective signal routing.
Solution Approach 2:
The shared final stage amplification unit is designed to perform multiple functions by amplifying signals for different communication bands (first band and second band) depending on which power amplifier is active. This multi-functional design allows one component to replace what would traditionally require two separate components.
2Adaptability or versatility
If multiple power amplifiers are provided for different frequency bands, then frequency band coverage is expanded, but unnecessary waves leak between power amplifiers
Solution Approach 1:
The patent introduces matching circuits as intermediary components between the drive stage amplification units and the shared final stage amplification unit. These matching circuits serve as mediators that selectively connect the appropriate drive stage to the final stage based on the active communication band, thereby preventing unnecessary waves from leaking between power amplifiers while maintaining broad frequency band coverage.
Solution Approach 2:
The system employs dynamic switching mechanisms where the matching circuits adjust their connection states based on which power amplifier is currently active. This dynamic reconfiguration allows the system to adapt to different operating conditions and prevent interference between the two power amplifiers operating in different frequency bands.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively suppresses unwanted wave leakage and reduces the overall size of the high frequency module by using a shared final stage amplification unit and filter-type matching circuits.
Implementation Method 1
The first matching circuit is a matching circuit of a filter type which is connected between the first drive stage amplification unit and the final stage amplification unit, and has a first pass band including the first communication band and a first attenuation band including the second communication band.
Data Source
AI summary
A high frequency module includes a first drive stage amplification unit, a second drive stage amplification unit, a final stage amplification unit, a first matching circuit, and a second matching circuit. The first drive stage amplification unit is connected to a first input unit. The second drive stage amplification unit is connected to a second input unit. The final stage amplification unit is connected to output units. The first matching circuit is connected between the first drive stage amplification unit and the final stage amplification unit, and has a first pass band including a first communication band and a first attenuation band including a second communication band. The second matching circuit is connected between the second drive stage amplification unit and the final stage amplification unit, and has a second pass band including the second communication band and a second attenuation band including the first communication band.