Tunable Antenna Matching for Wireless Isolation
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Solution Overview
Problem
Wireless communication devices face challenges in optimizing the isolation between dual antennas when switching between different wireless communication systems, leading to weakened transmitting and receiving efficiencies due to inadequate antenna matching.
Innovation Solution
A wireless communication device with a tunable matching circuit and detection unit that adjusts the matching of the diversity antenna based on the detected wireless communication system, either weakening its performance in the transmitting or receiving frequency band to improve isolation between the main and diversity antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual antennas are configured to support multiple wireless communication systems (MIMO, SIMO, SISO), then the adaptability of the wireless communication device is improved, but the isolation between antennas deteriorates when switching between systems
Solution Approach 1:
The patent applies dynamics by making the antenna matching circuit adjustable and reconfigurable. The matching circuit can dynamically change its characteristics based on the detected wireless communication system (MIMO, SIMO, or SISO), allowing the antenna isolation to be optimized for each specific system mode rather than being fixed for all modes.
Solution Approach 2:
The patent changes the electrical parameters of the matching circuit to optimize antenna isolation. By adjusting the matching circuit's impedance parameters according to the operating system mode, the patent achieves better isolation between antennas when switching between MIMO, SIMO, and SISO configurations.
2Productivity
If the diversity antenna is used for receiving only in SIMO system, then the receiving function is maintained, but the transmitting efficiency of the main antenna is weakened due to poor isolation
Solution Approach 1:
The patent applies local quality by making the matching circuit affect only the diversity antenna's transmitting characteristics while leaving the main antenna's receiving function intact. The matching circuit is configured to weaken the diversity antenna's transmitting capability specifically, without impacting the main antenna's receiving performance.
3Device complexity
If only the main antenna is used in SISO system, then the system complexity is reduced, but the transmitting and receiving efficiencies are weakened due to poor isolation with diversity antenna
Solution Approach 1:
The patent extracts or removes the diversity antenna's active participation in the SISO mode by configuring the matching circuit to weaken its coupling. This effectively isolates the diversity antenna from affecting the main antenna's performance in SISO operation, allowing the main antenna to operate efficiently without interference.
Data Source
AI summary
A wireless communication device includes a diversity antenna operating in a receiving frequency band to receive a receiving signal in the reception frequency band, a tunable matching circuit for adjusting a matching of the diversity antenna according to a control signal, a detection circuit for detecting a wireless communication system corresponding to the receiving signal to generate a detection result, wherein the detection result indicates an antenna configuration and a transmission frequency band corresponding to the wireless communication system, and a radio-frequency processing circuit for determining whether to adjust the matching of the diversity antenna to weaken antenna performance of the diversity antenna in both or one of the transmission frequency band and the reception frequency band according to the antenna configuration so as to improve an isolation between the diversity antenna and a main antenna.