RF Triplexer Architecture Using Hybrid Couplers for Signal Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current RF circuitry in wireless communications devices is limited in its ability to efficiently support multiple wireless protocols with varying performance requirements, such as out-of-band emissions and linearity, while also needing to be compact, cost-effective, and power-efficient.
Innovation Solution
The implementation of a triplexer architecture that includes hybrid RF couplers and tunable RF filter circuitry, allowing for simultaneous handling of lowband, midband, and highband RF communications by segregating signals and enhancing isolation between bands, thereby simplifying processing and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional RF circuitry is used to support multiple wireless protocols, then device functionality is maintained, but device size, cost, and power consumption increase
Solution Approach 1:
The RF circuitry is segmented into multiple switchable paths, each optimized for specific protocols (e.g., LTE path with FDD/TDD switches, NR path with SCS-selectable components). This allows the system to activate only the necessary segments for each protocol, reducing overall complexity and resource usage while maintaining multi-protocol capability
Solution Approach 2:
Common RF components (LNA, PGA, mixer, ADC/DAC) are designed to serve multiple protocols through software-controlled configuration. The universal RF front-end can be dynamically reconfigured via control circuitry to support different protocols, eliminating the need for dedicated hardware for each protocol and thereby reducing device size, cost, and power consumption
2Ease of manufacture
If RF circuitry is simplified to reduce size and cost, then manufacturing efficiency improves, but performance requirements (out-of-band emissions, linearity) become harder to meet
Solution Approach 1:
The RF circuitry incorporates dynamically switchable components including band-select switches, FDD/TDD mode switches, and SCS-selectable filters. These dynamic elements allow the simplified hardware to be reconfigured in real-time to meet different performance requirements for various protocols and operating conditions, ensuring reliability without increasing manufacturing complexity
Solution Approach 2:
The system changes operating parameters (frequency bands, scalar multiples of subcarrier spacing, FDD/TDD modes) through software control rather than hardware modification. This allows a single simplified RF circuit design to adapt to different performance requirements by adjusting operational parameters, maintaining reliability while keeping manufacturing simple
Data Source
AI summary
RF circuitry, which includes a first hybrid RF coupler, a second hybrid RF coupler, a third hybrid RF coupler, and RF filter circuitry, is disclosed. The first hybrid RF coupler provides a first main port, a first pair of quadrature ports, and an isolation port. The second hybrid RF coupler provides a second main port and a second pair of quadrature ports. The third hybrid RF coupler provides a third main port and a third pair of quadrature ports. RF filter circuitry is coupled to the first pair of quadrature ports, the second pair of quadrature ports, and the third pair of quadrature ports. The first main port, the second main port, and the third main port provide main ports of the RF triplexer. The isolation port is a common port of the RF triplexer for coupling to an RF antenna.