MIMO Transceiver SPDT Switches Antenna Gain
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Solution Overview
Problem
Current wireless devices have limitations in the transmission distance of RF signals due to the inherent characteristics of their antennas, restricting longer-range applications.
Innovation Solution
A multiple input multiple output (MIMO) transceiver design that includes two antennas with SPDT switches and sequence switches, connected through power amplifiers and transmission lines, which adjusts phase and power to increase transmission and reception gain, effectively functioning as a balance power amplifier and beamforming device to enhance signal transmission distance and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the antenna shape is changed to increase gain, then the transmission distance of RF signals is improved, but the transmission distance still has a certain limit that prevents longer-range applications
Solution Approach 1:
The patent divides the antenna system into multiple independent antenna elements (at least two antennas) that can be controlled separately. Each antenna element is connected through SPDT switches to either transmitting or receiving channels, allowing independent control and combination of multiple antenna signals to achieve higher gain without requiring a single complex antenna structure.
Solution Approach 2:
The patent creates a multi-functional system where the same antenna elements can serve both transmitting and receiving functions by switching between transmitting channels and receiving channels. The MIMO transceiver can operate in different modes (transmission, reception, or both simultaneously) using the same hardware resources, increasing versatility without adding dedicated separate structures.
2Length of moving object
If multiple antennas and switching components are added to increase transmission distance, then the transmission power gain is improved, but the device complexity increases
Solution Approach 1:
The SPDT switches serve multiple functions: they route signals between transmitting and receiving channels, enable MIMO operation modes, and allow the same antenna elements to be used for both transmission and reception. This multi-functionality reduces the need for separate dedicated components for each function.
Solution Approach 2:
The patent employs dynamic switching between different operational modes using SPDT switches. The system can dynamically reconfigure which antennas are transmitting, which are receiving, and how they are combined, allowing adaptive optimization of transmission distance and gain based on current operational requirements without permanent complex structural changes.
3Length of moving object
If the antenna system is optimized for longer range, then the transmission distance is improved, but the throughput and adaptability for different applications are reduced
Solution Approach 1:
The MIMO transceiver enables dynamic switching between different operational modes including simultaneous transmission and reception, alternating modes, and different antenna combinations. This dynamic reconfigurability allows the system to adapt to various application requirements (long-range communication, high throughput, energy saving) while maintaining the capability for extended transmission distance when needed.
Solution Approach 2:
The patent creates a universal communication system that can perform multiple functions: long-range transmission, high-throughput MIMO operation, and adaptive mode switching. The same hardware infrastructure supports both extended range applications and high-speed data transmission by dynamically configuring the antenna and channel assignments based on current needs.
Data Source
AI summary
An exemplary MIMO transceiver includes a first transmitting channel and a second transmitting channel. The first transmitting channel includes a first power amplifier and a first transmission line which are connected together in series. The second transmitting channel includes a second power amplifier. A common terminal of a first single pole double throw (SPDT) switch is connected to the second power amplifier. A first terminal of the first SPDT switch is connected to the first power amplifier through a second transmission line. A common terminal of a second SPDT switch is connected to the second power amplifier. A first terminal of second SPDT switch is connected to the first power amplifier through a third transmission line. A second terminal of the second SPDT switch is connected to a second antenna. The first power amplifier, the second transmission line, and the third transmission line cooperatively act as a balance power amplifier.