Switchable Diversity Antenna for MIMO Mobile Devices
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Solution Overview
Problem
Conventional mobile devices, constrained by limited hardware space, typically use single-input single-output (SISO) technology due to the inability to accommodate multiple antennas, resulting in limited data throughput and transmission distance.
Innovation Solution
A mobile device design that enables a first and second wireless communication circuit to share a diversity antenna through a switching circuit, allowing for multi-input multi-output (MIMO) technology by switching the diversity antenna between the circuits, thereby increasing data throughput and facilitating miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antennas are disposed in the mobile device to enable MIMO technology, then data throughput and transmission distance are improved, but device volume increases
Solution Approach 1:
The diversity antenna is designed to serve multiple functions by being switchably connected to different wireless communication circuits. The same antenna structure is used for both SISO reception and MIMO transmission, allowing one antenna to fulfill multiple roles depending on the operational mode, thereby enabling MIMO capability without proportionally increasing antenna quantity or device volume
Solution Approach 2:
The patent employs a switching circuit that dynamically reconfigures the antenna connections based on operational requirements. The diversity antenna can be dynamically switched between different wireless communication circuits (first and second circuits) depending on whether SISO or MIMO mode is active, allowing the system to adapt its antenna usage and achieve MIMO performance with flexible resource allocation rather than fixed multiple antennas
2Length of stationary object
If multiple antennas are disposed in the mobile device to enable MIMO technology, then transmission distance is improved, but device complexity increases
Solution Approach 1:
The diversity antenna serves multiple functions by being switchably connected to different wireless communication circuits. The same antenna structure is used for both SISO reception and MIMO transmission, allowing one antenna to fulfill multiple roles depending on the operational mode, thereby enabling MIMO capability without proportionally increasing antenna quantity or device volume
Solution Approach 2:
The patent employs a switching circuit that dynamically reconfigures the antenna connections based on operational requirements. The diversity antenna can be dynamically switched between different wireless communication circuits (first and second circuits) depending on whether SISO or MIMO mode is active, allowing the system to adapt its antenna usage and achieve MIMO performance with flexible resource allocation rather than fixed multiple antennas
Data Source
AI summary
A mobile device includes a diversity antenna, a radio-frequency antenna, a first wireless communication circuit, a second wireless communication circuit and a first switching circuit. The second wireless communication circuit is electrically connected to the radio-frequency antenna. The first switching circuit is electrically connected to the diversity antenna, the first wireless communication circuit and the second wireless communication circuit. In a first mode, the diversity antenna is conducted to the first wireless communication circuit through the first switching circuit, and the first wireless communication circuit receives a wireless signal through the diversity antenna. In a second mode, the diversity antenna is conducted to the second wireless communication circuit through the first switching circuit, and the second wireless communication circuit executes a multi-input multi-output transmission through the diversity antenna and the radio-frequency antenna.