Switchable Coupler Impedance for Low-Loss Shared RF Paths
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Solution Overview
Problem
The sharing of movement paths for transmission and reception signals in communication circuits leads to signal loss due to couplers installed in these shared paths, resulting in deteriorated communication quality.
Innovation Solution
Implementing a communication circuit with a switch that connects the coupler to either a matching or mismatching circuit based on specified times for transmission or reception signals, respectively, to prevent or reduce reception signal loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the coupler is installed in the shared path where transmission and reception signals move, then the transmission signal can be obtained for transceiver control, but the reception signal is also obtained causing signal loss and communication quality deterioration
Solution Approach 1:
The patent applies dynamics by making the coupler's impedance characteristic changeable through time-varying connection to matching or mismatching circuits. During transmission, the coupler connects to the matching circuit for accurate signal detection. During reception, it connects to the mismatching circuit to prevent signal loss. This dynamic reconfiguration resolves the contradiction between transmission signal detection accuracy and reception signal integrity.
Solution Approach 2:
The patent changes the impedance parameter of the coupler dynamically by switching between matching and mismatching circuits. The impedance value is adjusted based on the operational mode (transmission or reception), allowing the coupler to optimize its behavior for each function. This parameter change enables the coupler to accurately detect transmission signals while preventing reception signal loss.
2Measurement precision
If the coupler is connected to the matching circuit for impedance matching, then the transmission signal can be accurately obtained, but the reception signal experiences signal loss
Solution Approach 1:
The patent makes the coupler's circuit connection dynamic by switching between matching and mismatching circuits based on operational mode. During transmission, the matching circuit ensures accurate signal detection. During reception, the mismatching circuit prevents signal loss. This dynamic switching resolves the contradiction between detection accuracy and reception reliability.
Solution Approach 2:
The patent implements periodic switching of the coupler's circuit connection based on the periodic nature of communication operations (transmission followed by reception). The coupler alternates between connecting to the matching circuit during transmission periods and the mismatching circuit during reception periods, ensuring optimal performance for each phase.
3Reliability
If the coupler is connected to the mismatching circuit for impedance mismatching, then the reception signal loss is prevented, but the transmission signal cannot be accurately obtained
Solution Approach 1:
The patent applies dynamics by making the coupler's impedance characteristic changeable through time-varying connection to matching or mismatching circuits. During transmission, the coupler connects to the matching circuit for accurate signal detection. During reception, it connects to the mismatching circuit to prevent signal loss. This dynamic reconfiguration resolves the contradiction between transmission signal detection accuracy and reception signal integrity.
Solution Approach 2:
The patent implements periodic switching of the coupler's circuit connection based on the periodic nature of communication operations (transmission followed by reception). The coupler alternates between connecting to the matching circuit during transmission periods and the mismatching circuit during reception periods, ensuring optimal performance for each phase.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach improves reception performance by minimizing signal loss through the coupler during specified times, enhancing overall communication quality.
Implementation Method 1
a switch electrically connected, directly or indirectly, to the coupler, and the switch may connect the coupler to one circuit of a matching circuit for impedance matching of the coupler and a mismatching circuit for impedance mismatching of the coupler according to a time specified to output the transmission signal or a time specified to receive the reception signal
Data Source
AI summary
In communication circuitry and/or an electronic device including such communication circuitry, the communication circuitry may include: a transmission chain which outputs a transmission signal through an antenna; a reception chain which receives a receiving signal through the antenna; a transceiver electrically connected to the transmission chain and/or the reception chain; a coupler which transmits a portion of the transmission signal transmitted between the transmission chain and/or the reception chain and the antenna to the transceiver; and a switch electrically connected to the coupler, wherein the switch may connect the coupler to one circuit of a matching circuit for impedance matching of the coupler and an impedance of the coupler according to a time specified to output the transmission signal or a time specified to receive the reception signal and a mismatching circuit for mismatching of the coupler. Various other embodiments may be possible.