Tunable Duplexer Feedback Tuning for Isolation and Insertion Loss
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Solution Overview
Problem
Existing wireless communication devices face challenges in isolating wireless signals between transmitters and receivers due to insertion loss caused by non-ideal components in the duplexer, leading to interference and reduced communication performance.
Innovation Solution
The implementation of a tunable duplexer with adjustable components such as phase shifters and impedance tuners, coupled with a processor that combines test and wanted signals, allows for real-time adjustment of tuning states to optimize isolation and insertion loss performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a duplexer is used to isolate transmitter and receiver signals, then signal isolation is improved, but insertion loss increases due to non-ideal components
Solution Approach 1:
The patent applies dynamics by making the duplexer components tunable and adjustable in real-time. The system dynamically adjusts the tuning states of duplexer components based on measured performance characteristics, transforming a static isolation structure into an adaptive system that optimizes both isolation and insertion loss characteristics operating conditions.
Solution Approach 2:
The patent implements feedback by measuring the actual performance of the duplexer (isolation and insertion loss) and using this measurement to adjust the tuning states of the duplexer components. The processor receives performance data and automatically modifies the duplexer configuration to optimize performance, creating a closed-loop control system.
2Device complexity
If fixed tuning state components are used in the duplexer, then device complexity is reduced, but adaptability to different operating conditions deteriorates
Solution Approach 1:
The patent transforms static duplexer components into dynamic,可调 components that can change their electrical characteristics. The tunable components allow the duplexer to adapt to different frequency bands, power levels, and operating conditions without requiring multiple fixed designs, achieving versatility through controlled variability.
Solution Approach 2:
The patent changes the operating parameters of the duplexer components by adjusting tuning states (such as impedance values, phase shifts, or resonant frequencies). This allows the same physical components to perform optimally across different operating conditions by modifying their electrical parameters rather than changing the physical structure.
3Reliability
If real-time measurement and adjustment of tuning states is implemented, then communication performance is improved, but device complexity increases
Solution Approach 1:
The patent uses feedback to automatically measure and adjust duplexer performance in real-time. The system incorporates sensors or measurement circuits that monitor isolation and insertion loss, and the processor uses this feedback to automatically adjust the tuning states, eliminating the need for manual intervention and reducing operational complexity despite increased system complexity.
Solution Approach 2:
The duplexer system performs self-diagnosis and self-adjustment by measuring its own performance characteristics and automatically modifying its tuning states to optimize performance. This self-service capability reduces the need for external calibration and maintenance, improving reliability while managing complexity through automation.
Data Source
AI summary
Systems and methods combine a test signal with a wanted (downlink or uplink) signal at an input of a duplexer of a communication device, and receive the test signal at an output of the duplexer. The test signal may include a radio frequency signal having less power than the wanted signal to avoid interference, or a digital signal that is added to or extracted from the wanted signal when the wanted signal does not have a radio frequency. A processor of the communication device causes the duplexer to operate in a tuning state (e.g., to transmit signals having a transmission frequency and receive signals having a receive frequency). The measurement system determines a difference or ratio in power between the test signal at the duplexer output and the duplexer input, and adjusts the tuning state based on the difference or ratio (e.g., to decrease or minimize the difference or ratio).