Antenna Diversity Switch for Shared Multiband Wireless Devices
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Solution Overview
Problem
Existing wireless communication devices face challenges in sharing a single antenna between multiple transceivers, leading to conflicts and reduced performance due to competing signal demands across different communication bands.
Innovation Solution
The implementation of an antenna diversity switch and filter and switching circuitry, including a diplexer, allows for real-time switching between multiple antennas to optimize signal performance across 2.4 GHz and 5 GHz bands, enabling efficient sharing of antenna resources between WiFi, Bluetooth, and cellular transceivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single antenna is shared by multiple transceivers to minimize device size, then device form factor is reduced, but transceiver conflicts occur and wireless performance deteriorates
Solution Approach 1:
The patent segments the antenna system into multiple antennas (first antenna and second antenna) that can be independently controlled. The antenna diversity switch separates the antenna connections into different paths, allowing each transceiver to access dedicated antenna resources during conflicts, thereby resolving the performance deterioration while maintaining compact device size through shared architecture.
Solution Approach 2:
The patent implements dynamic antenna selection through the antenna diversity switch, which can real-time switch between different antenna configurations based on transceiver activity. This dynamic switching capability allows the system to adapt to changing communication conditions, resolving conflicts between transceivers and maintaining optimal wireless performance while keeping the device compact.
2Reliability
If multiple antennas are used to improve wireless performance through diversity switching, then signal strength is optimized, but device complexity increases
Solution Approach 1:
The patent designs the antenna structure and diplexer to serve multiple functions: the first and second antennas can be dynamically assigned to different transceivers (WiFi, Bluetooth, cellular) based on communication needs. The diplexer provides multi-path routing capability that supports various transmission and reception modes simultaneously, achieving high wireless performance without proportionally increasing device complexity through efficient resource sharing.
Solution Approach 2:
The antenna diversity switch acts as an intermediary component that manages the complexity of multiple antenna connections. It provides a centralized control point that simplifies the routing logic, allowing the system to handle multiple antennas and transceivers through a single switching mechanism rather than requiring complex individual routing for each transceiver-antenna pair.
3Adaptability or versatility
If filter and switching circuitry are added to enable antenna sharing between 2.4 GHz and 5 GHz transceivers, then frequency band compatibility is improved, but circuit complexity increases
Solution Approach 1:
The patent combines the filtering and switching functions into an integrated diplexer structure that handles both 2.4 GHz and 5 GHz frequency bands. This merged design allows the system to achieve broad frequency band compatibility through a single circuit module rather than requiring separate filtering and switching circuits for each frequency band, thereby improving adaptability while controlling circuit complexity through functional integration.
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 solution enhances wireless performance by ensuring the optimal antenna is used in real-time, minimizing conflicts and improving signal strength across multiple communication bands, thereby optimizing device performance in compact electronic devices.
Implementation Method 1
The diplexer may be formed from a bandpass filter and a low pass filter. For example, the diplexer may have a 5 GHz bandpass filter that is coupled to the second path and a 2.4 GHz low pass filter that is coupled to the first path.
Implementation Method 2
The diplexer may be formed from a bandpass filter and a low pass filter. For example, the diplexer may have a 5 GHz bandpass filter that is coupled to the second path and a 2.4 GHz low pass filter that is coupled to the first path.
Implementation Method 3
An antenna diversity switch may be controlled in real time to switch one of the antennas in the antenna structure into use. For example, if a first of the antennas is receiving signals more effectively than a second of the antennas, the antenna diversity switch may be used to switch the first antenna in to use, thereby optimizing wireless performance.
Implementation Method 4
Bandpass filtering circuitry in the filter and switching circuitry may be interposed in the first and second paths. For example, a 2.4 GHz bandpass filter may be interposed in the first path between the transceiver circuitry and the diplexer, whereas a 5 GHz bandpass filter may be interposed in the second path between the transceiver circuitry and the diplexer.
Data Source
AI summary
Electronic devices are provided that contain wireless communications circuitry. The wireless communications circuitry may have antenna diversity circuitry that allows an optimum antenna in an antenna structure to be switched into use during device operations. The antenna structure may be shared between multiple radio-frequency transceivers in a radio-frequency transceiver circuit. The radio-frequency transceiver circuit may be coupled to the antenna structure using switching and filtering circuitry. The filtering circuitry may include a diplexer that divides radio-frequency signals into a divided signal path based on frequency. The filtering circuitry may also include bandpass filters that are interposed in each branch of the divided signal path. Switching circuitry in the switching and filtering circuitry may be used to selectively configure the wireless communications circuitry in transmit and receive modes using multiple communications bands.