Tunable Duplexer Measurement for Isolation and Insertion Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication devices face challenges in isolating wireless signals between transmitters and receivers due to non-ideal performance of duplexer components, leading to insertion loss and interference, which complicates accurate measurement of isolation and insertion loss performance.
Innovation Solution
The implementation of a tunable duplexer with adjustable components, such as phase shifters and impedance tuners, that can be configured based on real-time measurements to optimize signal isolation and minimize insertion loss, using a processor to combine test signals with wanted signals and adjust tuning states dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a duplexer is used to isolate transmitter and receiver signals, then signal isolation is improved, but insertion loss increases due to non-ideal component performance
Solution Approach 1:
The patent employs tunable components (phase shifters, impedance tuners) within the duplexer that can be dynamically adjusted to different tuning states. This allows the duplexer to adapt its isolation and insertion loss characteristics in real-time, optimizing performance for different operating conditions and frequency ranges rather than being fixed at a single configuration.
Solution Approach 2:
The invention changes physical parameters of the duplexer components by adjusting the tuning state of tunable elements. By modifying phase shifts, impedance values, and other electrical parameters dynamically, the system can minimize insertion loss while maintaining adequate signal isolation across varying operational requirements.
2Ease of operation
If traditional measurement methods are used for isolation and insertion loss, then measurement simplicity is maintained, but measurement accuracy deteriorates due to signal interference
Solution Approach 1:
The measurement system performs preliminary actions by first determining the tuning state that optimizes isolation before conducting the actual isolation and insertion loss measurements. This preliminary optimization ensures that measurements are taken under the best possible conditions, reducing signal interference and improving accuracy without adding significant complexity to the measurement process.
Solution Approach 2:
The system uses feedback mechanisms where measurement results are used to adjust the tuning state of the duplexer components. This iterative feedback process allows the system to converge on optimal tuning states that maximize measurement accuracy by minimizing interference between transmitted and received signals during the measurement process.
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).