High-accuracy TR (Transmitter and Receiver) assembly using simple LNA (Low Noise Amplifier) circuit

Abstract

The invention discloses a high-accuracy TR (Transmitter and Receiver) assembly using a simple LNA (Low Noise Amplifier) circuit. The high-accuracy TR assembly comprises a circulator, a switch limiter, an LNA, a first filter, a first power amplifier, an attenuator, a TR changeover switch, a third power amplifier, a second filter, a limiter and a second power amplifier. According to the high-accuracy TR assembly disclosed by the invention, by adopting multiple amplification and multiple filter, the gain of signals is ensured while the SNR (Signal Noise Ratio) of the signals is ensured, and certain power is provided for follow-up signal analysis or signal transmitting; meanwhile, the noise coefficient and the gain of each amplifier are limited, and new noise is prevented from being brought in; meanwhile, the original gain which just needs to be subjected to primary amplification is divided into two stages, the noise coefficient is ensured while the amplification gain is amplified, and the purity degree of the signals is ensured.

Description

technical field [0001] The invention discloses a high-precision TR component using a simple low-noise amplifier circuit, which belongs to the technical field of signal processing. Background technique [0002] T / R is the abbreviation of Transmitter and Receiver. The T / R component usually refers to the part between the video and the antenna in a wireless transceiver system, that is, one end of the T / R component is connected to the antenna, and the other end is connected to the video processing unit to form a wireless transceiver system. [0003] In modern active phased array radar technology, the T / R component is a very critical component, and its design determines the reliability and cost of the entire radar to a large extent. In the design of the receiving channel of the T / R component, due to the consideration of the system noise figure, it is necessary to install a microwave low-noise amplifier at the front end to improve the receiving sensitivity. In the design of low-n...

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Problems solved by technology

[0006] The patent number is 201310584706.2, and the patent name is a design method for S-band miniaturized digital T / R components. This patent proposes solutions to the problems in the prior art, but the patent does not propose effective solutions on how to reduce noise and power technical means to solve problems

[0007] The patent number is 201410319094.9, and the patent name is dual-polarized multifunctional ultra-wideband T / R component. This patent points out the problems of the existing technology and proposes a technical solution for ultra-wideband, but there are certain problems in the implementation of this solution. A wide bandwidth will inevitably lead to an increase in the noise figure, and more noise will be introduced, which will affect the accuracy of the signal

[0008] At the same time, the noise figure of the T / R components commonly used in the prior art still cannot be effectively reduced, and the power cannot be too high. These problems need to be further improved, especially the low-noise amplifier is a circuit that has a greater impact on circuit power. One of the modules, how to simplify the circuit structure of this part is an urgent problem to be solved

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