Antenna Switching Circuit for Wireless Communication
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Solution Overview
Problem
In wireless communication devices, the limited space for antennas necessitates sharing among different communication systems using similar frequency bands, leading to reduced communication efficiency as one system must stop using a shared antenna when another is active, compromising overall performance.
Innovation Solution
A wireless communication device design incorporating multiple antennas, frequency-division multiplexing, and a switching circuit that dynamically adjusts connections based on the operating frequency band and state of transceivers to allow simultaneous operation of multiple systems without interference, supporting MIMO and antenna diversity technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple wireless communication systems share one antenna to reduce space, then the space for antennas is reduced, but the communication efficiency is reduced because one system must stop when another is active
Solution Approach 1:
The patent segments the frequency spectrum into different sub-bands and assigns different antennas to different sub-bands. The first antenna is configured to receive and transmit signals in a first sub-band of a first frequency band, the second antenna for a second sub-band of the first frequency band and a second frequency band signal, and the third antenna for a first sub-band diversity signal. This segmentation allows simultaneous operation of multiple wireless communication systems on the same shared antenna without mutual interference.
Solution Approach 2:
The patent implements dynamic antenna selection and configuration based on the operating state of different wireless communication systems. A switching circuit is provided to switch between different antenna connections according to the working state of transceivers. When the second transceiver is in a working state, the switching circuit connects the second antenna with the second transceiver and connects the first frequency-division multiplex to the primary path component, enabling the first transceiver to receive and transmit signals via the first antenna while the second transceiver receives and transmits signals via the second antenna.
2Productivity
If each wireless communication system has an exclusive antenna to maintain communication efficiency, then the communication efficiency is maintained, but the space for antennas increases
Solution Approach 1:
The patent makes a single antenna serve multiple functions by configuring it to handle different frequency sub-bands and support multiple wireless communication systems. The first antenna can receive and transmit the first sub-band signal of the first frequency band and the second sub-band signal of the first frequency band, while the second antenna can handle both the second sub-band signal and the second frequency band signal. This multi-functionality reduces the total number of antennas needed while maintaining communication efficiency through frequency-division multiplexing.
3Volume of moving object
If antennas are shared among systems using similar frequency bands, then the device size is reduced, but interference occurs between systems
Solution Approach 1:
The patent applies local quality by assigning different frequency sub-bands to different antenna paths within the shared antenna system. The first frequency-division multiplex separates the first sub-band signal and the second sub-band signal, directing them to different processing paths. This allows the same physical antenna to handle multiple frequency bands simultaneously without mutual interference, reducing device size while preventing signal interference.
Data Source
AI summary
A wireless communication device is provided. The wireless communication device comprises: a first antenna for receiving and transmitting a first sub-band signal of a first frequency band and a second sub-band signal of the first frequency band; a second antenna for receiving and transmitting the second sub-band signal and a second frequency band signal; a third antenna for receiving and transmitting a first sub-band diversity signal of the first frequency band; a first frequency-division multiplex coupled to the first antenna; a switching circuit coupled to the first frequency-division multiplex and the second antenna; a primary path component coupled to the first frequency-division multiplex and the switching circuit; a secondary path component coupled to the switching circuit and the third antenna; a first transceiver coupled to the primary path component and the secondary path component; and a second transceiver coupled to the switching circuit.