Multiband Quadplexer Integration for Carrier Aggregation Filtering
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Solution Overview
Problem
Existing wireless devices face challenges in efficiently supporting carrier aggregation due to increased filtering requirements as they are required to operate on multiple bands simultaneously, particularly when bands are close in frequency, leading to complex filtering needs and increased device complexity.
Innovation Solution
A multiband multiplexer configuration using a quadplexer with improved acoustoelectric resonators to integrate multiple filter components into a single component, simplifying the filter structure and reducing the number of components needed to support six different communication bands, thereby improving device performance and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate filter components are used to support carrier aggregation on multiple bands, then filtering capability is improved, but device complexity and size increase
Solution Approach 1:
The patent combines multiple separate filter components into a single integrated filter component that can simultaneously support multiple communication bands (e.g., Band 3, Band 4, Band 7, Band 23) through a single structure with multiple ports, thereby reducing device complexity while maintaining filtering capability for carrier aggregation
Solution Approach 2:
The integrated filter component is designed to perform multiple filtering functions simultaneously for different frequency bands and signal types (transmit and receive paths), allowing a single component to replace what would traditionally require multiple separate filters, thus reducing overall device complexity
2Reliability
If multiple separate filter components are used to support carrier aggregation on multiple bands, then filtering capability is improved, but device size increases
Solution Approach 1:
The patent integrates multiple filter functions into a single physical component, reducing the total volume occupied by filtering elements in the device. The integrated filter component occupies less space than multiple separate filter components would require, directly addressing the device size concern
3Reliability
If multiple separate filter components are used to support carrier aggregation on multiple bands, then filtering capability is improved, but manufacturing cost increases
Solution Approach 1:
The integrated filter component consolidates multiple filtering functions into a single manufacturable unit, reducing the number of discrete parts that need to be sourced, assembled, and tested. This integration lowers manufacturing complexity and associated costs while maintaining the required filtering performance for multiple bands
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 multiband multiplexer simplifies device structure, reduces component costs, and enhances RF performance by using a single component to cover multiple frequency bands, thus lowering device complexity and size while maintaining effective filtering capabilities.
Implementation Method 1
filtering, via a quadplexer, the plurality of signals transmitted and received over: a first communication band defined by a first transmission frequency range and a first reception frequency range; a second communication band defined by a second transmission frequency range and a second reception frequency range
Data Source
AI summary
Aspects are provided for multiband multiplexers. One example is a multiband multiplexer with a first filter element configured to have a first passband that spans a first predefined frequency range of a first communication band and a second predefined frequency range of a second communication band, wherein the first predefined frequency range overlaps a portion of the second predefined frequency range, a second filter element configured to have a second passband distinct from the first passband, a third filter element configured to have a third passband distinct from the first and second passbands, and a fourth filter element configured to have a fourth passband distinct from the first, second, and third passbands.