Antenna Switch with Frequency Separating Network for Multi-Band RF Front-End
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Solution Overview
Problem
Existing front-end circuits for portable mobile radio devices are limited in their ability to efficiently manage multiple radio bands, particularly in separating and processing signals from different frequency ranges without increasing the complexity and size of the antenna switch and signal paths.
Innovation Solution
A compact front-end module with a single antenna switch that alternately connects to five or more signal paths, incorporating a frequency separating network with high-frequency filters, allowing for the separation of signals from different radio bands without overlapping frequency ranges, and enabling simultaneous transmission and reception across multiple bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional switches are arranged in the diverted signal paths to separate mobile radio bands, then the ability to process multiple radio bands is improved, but the device complexity and size increase
Solution Approach 1:
The patent combines multiple switch functions into a single antenna switch component that can alternately connect the antenna to different signal paths. This single switch integrates the functionality of what would traditionally require multiple separate switches, thereby reducing device complexity while maintaining the ability to process multiple radio bands through its multiple ports and switching capabilities
2Adaptability or versatility
If the antenna switch connects to five or more signal paths to handle multiple radio bands, then the versatility for processing different radio systems is improved, but the area and volume of the switch component increase
Solution Approach 1:
The patent implements a nested structure where the frequency separating network is integrated within or closely coupled to the antenna switch component. The signal paths are arranged in a compact configuration where multiple paths share common infrastructure, allowing the switch to handle five or more signal paths while minimizing the overall footprint through efficient spatial arrangement and integration of components
Data Source
AI summary
A front-end module is for use with at least three radio frequency bands. The front-end module includes at least five signal paths, and an antenna switch to electrically connect an antenna to one of the signal paths. At least one of the signal paths includes subpaths. A frequency separating network interfaces the at least one signal path to the subpaths. The subpaths are for use in passing different radio frequency bands. The different radio frequency bands have frequency ranges that do not overlap.