RF Power Amplifier Input Layout for Lower Signal Interference
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Solution Overview
Problem
In radio-frequency modules with multiple power amplifiers, transmit signals often interfere with each other, affecting communication efficiency.
Innovation Solution
The placement of input terminals for the first and second power amplifiers is strategically arranged on the mounting substrate to prevent overlap and maximize distance between them, reducing signal interference by positioning them in specific edge sections or regions of their respective outer peripheries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power amplifiers are mounted on the same substrate to enable multiple transmit signals, then communication capability is improved, but signal interference between amplifiers increases
Solution Approach 1:
The patent applies local quality by differentiating the placement positions of input terminals for different power amplifiers. Specifically, the first input terminal is placed in a first edge section of the first power amplifier's outer periphery, while the second input terminal is placed in a second edge section of the second power amplifier's outer periphery, positioned as far apart as possible. This localized differentiation in terminal placement reduces signal interference while maintaining the ability to transmit multiple signals simultaneously.
2Area of stationary object
If input terminals of power amplifiers are placed close together to reduce device area, then manufacturing efficiency is improved, but signal interference between amplifiers increases
Solution Approach 1:
The patent employs asymmetry by placing input terminals at different, non-symmetric positions on the substrate. The first input terminal is positioned in the first edge section of the first power amplifier's outer periphery, while the second input terminal is positioned in the second edge section of the second power amplifier's outer periphery. This asymmetric placement maximizes the distance between input terminals, reducing signal interference while maintaining compact device dimensions.
3Reliability
If input terminals are positioned in edge sections to reduce interference, then signal quality is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-planning and pre-positioning the input terminals in specific edge sections of the power amplifiers' outer peripheries during the design stage. The first input terminal is positioned in the first edge section and the second input terminal in the second edge section, maximizing their separation before the actual device assembly. This preliminary positioning ensures reduced signal interference without requiring complex additional components or adjustments during operation.
Data Source
AI summary
A radio-frequency module includes a mounting substrate and first and second power amplifiers. The first and second power amplifiers are each mounted on one main surface of the mounting substrate. The first power amplifier includes a first input terminal and a first outer periphery. The first outer periphery includes a first edge section. The second power amplifier includes a second input terminal and a second outer periphery. The second outer periphery includes a second edge section. The second edge section opposes the first edge section in a first direction. The first input terminal is disposed in the first edge section of the first power amplifier. The second input terminal is disposed in the second edge section of the second power amplifier. The first and second input terminals do not overlap each other in the first direction.