Low-noise amplifier circuit TR (transmitter-receiver) component with TA7505 double amplification structure

Abstract

The invention discloses a low-noise amplifier circuit TR (transmitter-receiver) component with a TA7505 double amplification structure. The low-noise amplifier circuit TR component comprises a circulator, a switch limiter, a low-noise amplifier, a first filter, a first power amplifier, an attenuator, a transmitter-receiver switch, a third power amplifier, a second filter, a limiter and a second power amplifier. By the aid of multiple amplification and multiple filtering, the signal-to-noise ratio of a signal is ensured, the gain of the signal is also ensured, a certain power is provided for subsequent signal analysis or signal transmission, a noise coefficient and the gain of each amplifier are limited, new noise is prevented, original gain only needing one-stage amplification is decomposed into two stages, the gain is amplified, and the noise coefficient and the purity of the signal are ensured.

Description

technical field [0001] The invention discloses a low-noise amplifier circuit TR assembly using a TA7505 double amplification structure, 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 ...

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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, the dual amplification structure is an effective solution

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