Indoor linear relay amplifier of Tiantong satellite ground station

Abstract

The invention discloses an indoor linear relay amplifier of a Tiantong satellite ground station. Technical key points are as follows: the amplifier comprises a front-end duplexer DPX1 and a tail-end duplexer DPX2, a receiving channel and a transmitting channel are arranged between the front-end duplexer DPX1 and the tail-end duplexer DPX2; the receiving channel comprises a low noise amplifier LNA1, a signal amplifier AMP1 and a power amplifier PA1 which are cascaded; wherein the transmitting channel comprises a low noise amplifier LNA2, a signal amplifier AMP2 and a power amplifier PA2 which are in cascade connection; the amplifier also comprises a linear holding circuit, wherein the linear holding circuit comprises a single-chip microcomputer MCU, an expansion port of the single-chip microcomputer MCU is respectively connected with a detector DET1, a detector DET2, an amplitude limiter LIM1, an amplitude limiter LIM2, a transmitting end coupler COP2 and a receiving end coupler COP1, and the amplifier also comprises a power supply module used for supplying power. The linear holding circuit composed of the MCU and the amplitude limiter is adopted, linear output of final-stage poweramplification is kept, the amplifier can adapt to a long distance and a short distance, the gain of the amplifier does not need to be adjusted manually, and the communication performance of the relayamplifier is improved.

Description

technical field [0001] The invention relates to supporting equipment for satellite communication, in particular to an indoor linear relay amplifier of a Tiantong satellite ground station. Background technique [0002] With the launch of the Tiantong No. 1 satellite, a new option has been added to our country’s communication channels. The satellites mainly serve remote mountainous areas, grasslands, deserts, oceans, and financial, securities, military, etc. that require confidentiality. field of voice and data communications. Satellite phones, you can make calls when you can see the sky, and there is no signal blind spot, but the use of satellite phones is different from ordinary mobile phones. You need to actively go to the window or outdoors to search the Internet, and you cannot make calls indoors. [0003] At present, Tiantong mobile phones have been put on the market, and the usage is gradually expanding. However, Tiantong mobile phones have a relatively big disadvantag...

AI Technical Summary

Problems solved by technology

Satellite phones, you can make calls when you can see the sky, and there is no signal blind spot, but the use of satellite phones is different from ordinary mobile phones. You need to actively go to the window or outdoors to search the Internet, and you cannot make calls indoors

[0003] At present, Tiantong mobile phones have been put on the market, and the usage is gradually expanding. However, Tiantong mobile phones have a relatively big disadvantage at present, that is, they must be outdoors to establish a link with the satellite when communicating, and cannot be used normally indoors or in a sheltered space.

In order to communicate normally, it is necessary to configure a signal repeater indoors to enhance the radiation of the indoor and outdoor signals. At present, the ground relay amplifiers of the existing technology have weak adaptability and a short distance from the mobile phone, and generally have a fixed gain or It is necessary to manually adjust the gain, and adjust the gain of the amplifier according to the distance between the mobile phone and the indoor antenna of the relay (signal strength), otherwise the amplifier will be saturated or self-excited if the distance is too close, causing communication jams or distortion, such as gain If the setting is too small, it will not be able to communicate normally if it is too far away.

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