Radio-Frequency Module Switch Design for Signal Isolation
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Solution Overview
Problem
The increasing number of band combinations in simultaneous transmission, such as ENDC and CA, leads to signal quality deterioration due to intermodulation distortion, and existing solutions complicate the radio-frequency module design, increasing its size and complexity.
Innovation Solution
A radio-frequency module design that includes power amplifiers, low-noise amplifiers, and switches with specific antenna and diversity terminal connections, allowing for the use of multiple antennas to secure signal isolation and reduce module size by selectively connecting antennas for different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antennas are connected to the radio-frequency module to support simultaneous transmission, then signal quality is improved, but device complexity and size increase
Solution Approach 1:
The switch is designed with multiple terminals (first antenna terminal, second antenna terminal, first diversity terminal, second diversity terminal, first primary terminal, second primary terminal) that can be connected in various configurations. This multi-functional switch allows the radio-frequency module to support multiple band combinations and transmission modes (ENDC, CA) using the same hardware structure, thereby improving signal quality without proportionally increasing device complexity.
2Reliability
If multiple antennas are connected to the radio-frequency module to support simultaneous transmission, then signal quality is improved, but module size increases
Solution Approach 1:
The patent combines multiple antenna interfaces and switching functions into a single integrated switch component. By merging the functions of multiple antenna connections, diversity terminals, and primary terminals into one switch unit, the module size is minimized while still supporting multiple antennas for improved signal quality during simultaneous transmission.
3Adaptability or versatility
If the radio-frequency module supports increased band combinations, then adaptability is improved, but intermodulation distortion increases causing signal quality deterioration
Solution Approach 1:
The switch is designed to dynamically reconfigure its connections based on the required band combination and transmission mode. By enabling flexible and dynamic switching between different terminal configurations, the module can adapt to various band combinations (ENDC, CA) while maintaining optimal signal paths that minimize intermodulation distortion and preserve signal quality.
Data Source
AI summary
A radio-frequency module includes first and second power amplifiers, a first low-noise amplifier, and a first switch. Each of a first primary terminal, a second primary terminal, and a first diversity terminal of the first switch is connectable to each of a first antenna terminal, a second antenna terminal, and a second diversity terminal of the first switch. The first power amplifier connects to one of the first and second primary terminals. The second power amplifier connects to the other one of the first and second primary terminals. The first low-noise amplifier connects to the first primary terminal or the second primary terminal. The first diversity terminal is connectable to a second low-noise amplifier included in a diversity module. The second diversity terminal is connectable to a third antenna terminal included in the diversity module.