Transceiver Bypassing Diplexer to Trap Desensitizing Frequencies

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Solution Overview

Problem

Transceiver devices face desensitization issues due to harmonic relationships and blockers in emerging LTE-Advanced technologies, particularly with inter-band carrier aggregation, leading to inefficient signal reception and potential interference.

Innovation Solution

A transceiver device architecture that includes a wave multiplexing-demultiplexing device and a piece of hardware, such as a PWB line, to bypass the diplexer in normal operation and trap desensitizing frequencies in carrier aggregation modes, preventing interference and maintaining performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If inter-band carrier aggregation is implemented to enhance network capacity and coverage, then system performance is improved, but frequency desensitization occurs due to harmonic relationships between transmitter and receiver frequencies

Engineering Contradiction:

Improvenetwork capacityVSAvoidfrequency desensitization

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts and removes the harmful desensitizing frequencies from the receiver path by introducing a filter that specifically targets and eliminates these frequencies before they can affect the receiver, allowing carrier aggregation to proceed without causing desensitization

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces an intermediary filter component between the transmitter and receiver that acts as a mediator to block harmful harmonic frequencies while allowing legitimate communication signals to pass through, enabling safe operation in carrier aggregation mode

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If a duplexer is used to enable simultaneous transmit and receive operations on a single antenna, then device complexity is reduced, but isolation between transmitter and receiver parts is insufficient to prevent desensitization

Engineering Contradiction:

Improveantenna sharing architectureVSAvoidreceiver desensitization

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the receiver path by adding a dedicated filter stage that separates harmful frequencies from useful signals, allowing the duplexer to maintain its simple architecture while the added filter provides the necessary protection against desensitization

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The filter acts as an intermediary component between the duplexer and the receiver, providing additional isolation and protection without requiring fundamental changes to the duplexer architecture or antenna sharing setup

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If frequency desensitization is prevented by avoiding harmonic relationships, then receiver performance is maintained, but the ability to operate in carrier aggregation mode is limited

Engineering Contradiction:

Improvereceiver performanceVSAvoidcarrier aggregation capability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent converts the potentially harmful harmonic frequencies into a manageable problem by using a filter to selectively block only these specific frequencies, allowing the system to operate in carrier aggregation mode while maintaining receiver performance through targeted frequency management

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS9300350B2Transceiver device adapted to operate in a first communication mode and a second communication mode

Publication Date: 2016.03.29 AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE LTD

AI summary

A transceiver device comprises a transmitter part, a receiver part and a multiple throw switch, said transceiver device being adapted to operate in a first communication mode and a second communication mode that differs from the first communication mode in that a first frequency desensitizing the receiver part of the transceiver device is expected to be present in the second communication mode. The multiple throw switch is configured such that a pole is connected to a first throw in the first communication mode and to a second throw in the second communication mode. The transceiver device further comprises: a wave multiplexing-demultiplexing device connected to the first throw of the multiple throw switch; a first piece of hardware connected, on one side, to the second throw of the multiple throw switch and, on the other side, to an interface of the wave multiplexing-demultiplexing device dedicated to either high-band signals or to low-band signals, wherein said first piece of hardware is adapted to bypass the wave multiplexing-demultiplexing device in the first communication mode and to trap the first frequency in the second communication mode.