Parallel Coexistence Filter Paths for Concurrent Wireless Transceivers

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In wireless communication devices, multiple transceivers operating on different radio technologies often interfere with each other, leading to performance degradation due to concurrent operation, which existing technologies have not adequately addressed.

Innovation Solution

A filter circuit with parallel frequency paths is implemented to cancel out interfering frequencies while maintaining acceptable signal insertion loss, allowing multiple transceivers to coexist without interference, using a combination of low pass and high pass filters to route frequencies through appropriate paths to ensure acceptable insertion loss across all frequencies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a filter circuit is used to remove interfering frequencies from the second transceiver, then interference with the first transceiver is reduced, but insertion loss increases

Engineering Contradiction:

ImproveinterferenceVSAvoidinsertion loss

Core Design Contradiction:

Object-affected harmful factorsVSLoss of energy

Solution Approach 1:

The filter circuit is divided into multiple frequency paths (first frequency path and second frequency path), each handling different frequency ranges. This segmentation allows selective filtering of interfering frequencies while preserving desired frequencies, thereby reducing overall insertion loss while still eliminating interference to the first transceiver.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different frequency paths are assigned different filtering characteristics tailored to their specific frequency ranges. The first frequency path is optimized for frequencies below the first transceiver's operating frequency, while the second frequency path handles frequencies above it. This local optimization ensures minimal insertion loss in each path while effectively removing interfering frequencies.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If multiple transceivers operate concurrently, then device functionality is improved, but interference between transceivers increases

Engineering Contradiction:

Improveconcurrent operationVSAvoidinterference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The harmful interfering frequencies from the second transceiver are extracted and removed by the filter circuit before the signals are transmitted. By taking out the problematic frequency components that would interfere with the first transceiver, the system enables concurrent operation of multiple transceivers without mutual interference.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The filter circuit acts as an intermediary between the second transceiver and the antenna system. It mediates the frequency conflicts by selectively passing or blocking frequencies, allowing the second transceiver to operate concurrently with the first transceiver while preventing interference through the frequency-selective filtering action.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 that both the interfering frequencies are filtered out and the remaining frequencies maintain acceptable insertion loss, thereby improving the coexistence of transceivers and enhancing the performance of wireless communication devices.

Implementation Method 1

a filter circuit coupling the second transceiver with the antenna, where 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 EffectFiltering: Filter (electronic)

Implementation Method 2

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

Methodology Applied

Scientific EffectFrequency selective attenuation: Filter (electronic)

Data Source

PatentUS11349505B2Systems and methods for transceiver coexistence filtering

Publication Date: 2022.05.31 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.