Adaptive Duplexer Filters for Overlapping RF Band Separation

Solution Overview

Problem

Existing electronic devices face challenges in managing multiple frequency bands with overlapping frequency ranges, leading to increased size and complexity of radio frequency front ends (RFFEs) due to the inclusion of multiple duplexers.

Innovation Solution

The electronic device incorporates a duplexer with adaptive filters and impedance matching circuits controlled by a processor to adjust cut-off frequencies and center frequencies, allowing for efficient management of overlapping frequency bands without the need for multiple duplexers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple duplexers are included to manage multiple frequency bands with overlapping ranges, then signal separation capability is improved, but device size and complexity increase

Engineering Contradiction:

Improvesignal separation capabilityVSAvoidRFFE complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple duplexer functionalities into a single duplexer by integrating multiple filters (first filter for first frequency band, second filter for second frequency band) within one duplexer structure. This merging approach maintains the ability to separate signals across multiple frequency bands while reducing the overall number of duplexers and associated complexity in the RFFE.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single duplexer is designed to perform multiple functions by incorporating filters that handle different frequency bands. The first filter manages the first frequency band while the second filter manages the second frequency band, allowing one duplexer to serve multiple frequency management roles that traditionally required separate duplexers.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple duplexers are included to manage multiple frequency bands with overlapping ranges, then signal separation capability is improved, but device size increases

Engineering Contradiction:

Improvesignal separation capabilityVSAvoidRFFE area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent combines multiple duplexer functionalities into a single duplexer by integrating multiple filters (first filter for first frequency band, second filter for second frequency band) within one duplexer structure. This merging approach maintains the ability to separate signals across multiple frequency bands while reducing the overall number of duplexers and associated complexity in the RFFE.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12519493B2Electronic device including duplexer including filter having characteristic that is adaptively changed according to state

Publication Date: 2026.01.06 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device may include an antenna, a radio frequency front end (RFFE) including a first duplexer including a first filter and a second filter and a second duplexer including a first filter and a second filter and at least one processor, operatively coupled with the RFFE, configured to change a cut-off frequency of the second filter in the first duplexer to a first frequency cutting off the sixth signal in portion of the downlink frequency range of the third frequency band partially overlapping the downlink frequency range of the second frequency band or change a cut-off frequency of the second filter in the second duplexer to a second frequency cutting off the fourth signal in portion of the downlink frequency range of the second frequency band partially overlapping the downlink frequency range of the third frequency band. In addition, various embodiments be possible.