Multiplexer Filter Layout for ENDC Band Interference Isolation
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Solution Overview
Problem
Existing multiplexers struggle to handle ENDC scenarios where two transmission signals with overlapping frequency bands are transmitted simultaneously, leading to interference and suboptimal mounting characteristics in electronic devices.
Innovation Solution
A multiplexer with a filter structure that allows two transmission signals with non-overlapping frequency bands and two reception signals with partially overlapping frequency bands to be processed, using separate filters for each signal type, ensuring efficient signal transmission and reception without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional multiplexer is used to handle ENDC scenarios with two transmission signals, then the device complexity is reduced, but signal interference occurs when frequency bands overlap
Solution Approach 1:
The multiplexer is segmented into multiple independent filter paths: a first filter path for first transmission signals and a second filter path for second transmission signals. Each filter path processes signals independently, preventing interference between overlapping frequency bands while maintaining overall system functionality.
Solution Approach 2:
Separate filters act as intermediaries between the power amplifier and the antenna for different transmission signal paths. These intermediary filters isolate the frequency bands, allowing simultaneous transmission without direct interference while preserving signal integrity.
2Reliability
If separate filters are added for each signal type to prevent interference, then signal transmission quality improves, but the device complexity increases
Solution Approach 1:
The multiplexer structure is designed to perform multiple functions: it simultaneously handles first transmission signals through the first filter, second transmission signals through the second filter, and first reception signals through the third filter. This multi-functional design consolidates what would otherwise require separate devices into a single integrated component.
Solution Approach 2:
Multiple filter functions are merged into a single multiplexer device. The first filter, second filter, and third filter are integrated within one multiplexer structure, reducing the overall number of discrete components while maintaining the ability to process multiple signal types independently.
3Adaptability or versatility
If the multiplexer supports ENDC scenarios with multiple frequency bands, then the adaptability improves, but the mounting characteristics deteriorate
Solution Approach 1:
The multiplexer utilizes frequency dimensionality to handle multiple signals simultaneously. By processing first transmission signals and second transmission signals on different frequency bands through separate filter paths, the device accommodates ENDC scenarios without requiring additional physical space for separate hardware components.
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 solution enables simultaneous transmission of two transmission signals and reception of two reception signals with improved filter characteristics, enhancing the mounting characteristics of electronic devices and supporting ENDC scenarios effectively.
Implementation Method 1
a first filter configured to allow a first transmission signal corresponding to a first frequency band and obtained through the first port to pass therethrough so as to be output to the second port
Implementation Method 2
a second filter configured to allow a second transmission signal obtained through the first port and corresponding to a second frequency band different from the first frequency band to pass therethrough so as to be output to the second port
Implementation Method 3
a third filter configured to allow a first reception signal corresponding to a third frequency band or a second reception signal corresponding to a fourth frequency band, which are obtained through the second port, to pass therethrough so as to be output to the third port
Data Source
AI summary
An example multiplexer may include a first port connected to a power amplifier, a second port connected an antenna, a third port connected to a low noise amplifier, a first filter configured to allow a first transmission signal corresponding to a first frequency band and obtained through the first port to pass therethrough so as to be output to the second port, a second filter configured to allow a second transmission signal corresponding to a second frequency band different from the first frequency band and obtained through the first port to pass therethrough so as to be output to the second port, and a third filter configured to allow a first reception signal corresponding to a third frequency band and a second reception signal corresponding to a fourth frequency band, which are obtained through the second port, to pass therethrough so as to be output to the third port.