Radio Frequency Amplifier and Control Method of Time Division Duplex System Without Radio Frequency Switch

Abstract

The invention discloses a radio-frequency amplifier and a control method of a time division duplex system without a radio-frequency switch. The radio-frequency amplifier and the control method of the time division duplex system without the radio-frequency switch comprises a first signal input port (a), a first protective circuit and a first band-pass filter. The radio-frequency amplifier and the control method of the time division duplex system without the radio-frequency switch is characterized in that the first band-pass filter is connected with a connector 2 of a first circulator; a connector 3 of the first circulator is connected with a first high gain low noise amplifier which is connected with a first power divider. The first power divider is connected with a first low noise amplifier and a first radio-frequency amplifier. The first low noise amplifier is connected with a first wave detector. The first wave detector is respectively connected with a first voltage switching circuit and an input end of a frist schmitt trigger. The input end of the schmitt trigger is further connected with a first voltage reference level circuit (vrefl). An output end of the first schmitt trigger is connected with a first phase inverter and a first AND door. The first phase inverter is connected with a second AND door. An output of the first AND door is connected with the first radio-frequency amplifier. An output of the second AND door is connected with a second radio-frequency amplifier.

Description

technical field [0001] The invention relates to a signal amplifier and a control method of a time division duplex system, in particular to a radio frequency amplifier and a control method of a time division duplex system without a radio frequency switch. Background technique [0002] In short-range wireless communication, due to the influence of factors such as long distances between devices and obstructions, there are often problems such as weak signals and poor communication quality. In order to transmit wireless signals to the target area, signal relaying is necessary. Currently there are three main methods: [0003] 1. Increase the signal coverage by increasing the radio frequency power. This method can better improve the problem of poor signal quality caused by long transmission distance, but the problem of poor communication quality caused by obstacles is not good. . [0004] 2. The signal is transmitted to the target area through a wired method, usually Ethernet or...

AI Technical Summary

Problems solved by technology

This method can effectively extend the communication distance, but the hardware structure of this method is complicated, the transmission delay is relatively large, and it requires wired connection and additional equipment support, which is costly

[0005] 3. In addition, patent 200710303870.6 proposes a two-way dynamic amplification method and device for time division duplex systems. The device and method are suitable for TDD systems, but the device and method have defects such as small dynamic range and complicated control.

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