Integrated RF Front-End Multiplexing Across Cellular and WiFi Bands
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Solution Overview
Problem
Existing radio frequency (RF) communication systems face challenges in efficiently handling multiple frequency bands and bands with overlapping frequency ranges, particularly in advanced cellular technologies like LTE-Advanced and 5G NR, leading to complexity and inefficiencies in network operations.
Innovation Solution
A mobile device architecture incorporating multiple antennas and antenna-plexers, including diplexers and triplexers, to handle multiple cellular and wireless local area network bands, with tunable frequency corners and shared amplifiers, enabling efficient multiplexing and communication across n77, n79, and n104 frequency bands, along with WiFi 5 and WiFi 6 gigahertz bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate power amplifiers are used for each frequency band, then the coverage and capability of the RF system is improved, but the device complexity and cost increase
Solution Approach 1:
The patent implements a shared power amplifier that can operate across multiple frequency bands (n77, n79, n104) and WiFi bands (5 GHz, 6 GHz) by dynamically reconfiguring its operating parameters. This single amplifier replaces what would traditionally require multiple separate amplifiers, reducing device complexity while maintaining comprehensive frequency band coverage through adaptive tuning capabilities.
Solution Approach 2:
The patent employs dynamic reconfiguration of the power amplifier's operating characteristics, including adjustable frequency ranges and power levels, to adapt to different communication standards and frequency bands. This dynamic capability allows the same hardware component to serve multiple functions across varying operational requirements, eliminating the need for fixed-frequency dedicated amplifiers.
2Reliability
If dedicated antenna-plexers are used for each frequency band, then the signal isolation and performance are improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple antenna-plexer functions into a single integrated antenna-plexer that handles multiple frequency bands (n77, n79, n104) and WiFi bands simultaneously. This consolidation reduces the number of separate components while maintaining signal isolation through advanced filtering and switching mechanisms that dynamically route signals based on the active frequency band.
Solution Approach 2:
The integrated antenna-plexer is designed with universal functionality to manage multiple frequency bands and communication standards through a single component. It incorporates adaptive filtering and switching capabilities that provide adequate signal isolation across all supported bands without requiring dedicated isolation components for each frequency range.
3Adaptability or versatility
If the high corner frequency is fixed, then the design is simpler, but the adaptability to different WiFi bands is reduced
Solution Approach 1:
The patent implements a tunable high corner frequency mechanism in the antenna-plexer that can be dynamically adjusted to match different WiFi band requirements (5 GHz, 6 GHz). This tunability is achieved through voltage-controlled filtering elements that allow the cutoff frequency to be modified based on the active WiFi band, providing adaptability while maintaining a relatively simple overall design through integrated control.
Data Source
AI summary
Apparatus and methods for radio frequency front-end architectures are disclosed. In certain embodiments, radio frequency front-ends (RFFEs) are disclosed with a high level of integration and component reuse for antennas, power amplifiers (PAs), low noise amplifiers (LNAs), filters, and/or modules. For instance, 2 RFFE modules and 6 antennas can cover all sub-7 GHz frequency bands. Such frequency bands can include not only cellular frequency bands, but also frequency bands for WiFi and/or cellular vehicle-to-everything (CV2X).