Parallel Frequency-Path Filtering for Transceiver Coexistence

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Solution Overview

Problem

Wireless communication devices with multiple transceivers operating on different radio technologies often experience performance degradation due to interference between concurrently operating transceivers, leading to reduced wireless range or inoperability of one or more transceivers.

Innovation Solution

A filter circuit with parallel frequency paths is implemented to couple a second transceiver with an antenna, where one path filters out interfering frequencies from the first transceiver while maintaining acceptable insertion loss across remaining frequencies, allowing coexistence of multiple transceivers without interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple transceivers operate concurrently in a wireless communication device, then the device can support multiple radio technologies, but interference occurs between transceivers causing performance degradation

Engineering Contradiction:

Improvesupport for multiple radio technologiesVSAvoidtransceiver performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The filter circuit is divided into multiple parallel frequency paths (first frequency path, second frequency path, etc.), each responsible for handling specific frequency ranges. This segmentation allows the filter to process different frequency bands simultaneously, effectively filtering out interference from other transceivers while maintaining the performance of each individual transceiver operating on different radio technologies.

Inventive Principle:

Principle #1Segmentation

2Reliability

If a filter circuit is added to reduce interference between transceivers, then transceiver coexistence is improved, but device complexity increases

Engineering Contradiction:

Improvetransceiver coexistenceVSAvoidfilter circuit structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The filter circuit is designed with multiple parallel frequency paths that can handle different frequency ranges within a single integrated structure. This multi-functional design allows the same filter circuit to serve multiple transceivers operating on different radio technologies, reducing the need for separate filter circuits for each transceiver and thereby limiting the increase in device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If a filter is used to block interfering frequencies, then interference is reduced, but insertion loss increases at blocked frequencies

Engineering Contradiction:

Improveinterference from other transceiversVSAvoidinsertion loss

Core Design Contradiction:

Object-affected harmful factorsVSLoss of energy

Solution Approach 1:

The filter circuit employs parallel frequency paths where each path is optimized for specific frequency ranges. By routing signals through different paths based on their frequency content, the filter achieves high rejection of interfering frequencies in specific bands while maintaining low insertion loss for desired frequencies, creating locally optimized filtering characteristics across different frequency ranges.

Inventive Principle:

Principle #3Local quality

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 effectively reduces interference between transceivers, ensuring acceptable insertion loss and maintaining reliable operation of all transceivers, thereby enhancing the coexistence of different radio technologies in a single device.

Implementation Method 1

the filter circuit includes a first frequency path and a second frequency path in parallel to one another. The first frequency path is configured to pass a first set of frequencies of the radio transmissions, and the second frequency path configured to pass a second set of frequencies of the radio transmissions

Methodology Applied

Scientific EffectFrequency filtering: Filter (electronic)

Data Source

PatentUS10911074B2Systems and methods for transceiver coexistence filtering

Publication Date: 2021.02.02 TYCO FIRE & SECURITY GMBH

AI summary

A wireless communication device includes a first transceiver operable according to a first radio technology and a second transceiver operable according to a second radio technology and operable concurrently with the first transceiver. The wireless communication device further includes an antenna configured to transmit radio transmissions of the second transceiver, and a filter circuit coupling the second transceiver with the antenna. The filter circuit includes a first frequency path and a second frequency path in parallel. The first frequency path passes a first set of frequencies of the radio transmissions and the second frequency path passes a second set of frequencies of the radio transmissions. One of the first frequency path or the second frequency path is configured to filter the radio transmissions of the second transceiver to remove signals corresponding to the one or more operating frequencies of the first transceiver from the radio transmissions of the second transceiver.