Full-digital broadband microwave emitter and control method thereof

A control method and transmitter technology, applied in the direction of transmission control/equalization, electrical components, transmission systems, etc., can solve the problems of difficult universal use, complex structure of microwave transmitters, and high price, and achieve noise reduction, low distortion, and sensitivity. high effect

Active Publication Date: 2010-04-28
桂林市思奇通信设备有限公司
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AI Technical Summary

Problems solved by technology

However, foreign microwave transmitters are complex in structure and high in price, making it difficult to popularize them in China

Method used

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  • Full-digital broadband microwave emitter and control method thereof
  • Full-digital broadband microwave emitter and control method thereof
  • Full-digital broadband microwave emitter and control method thereof

Examples

Experimental program
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Embodiment Construction

[0026] Embodiment of all-digital broadband microwave transmitter

[0027] The structure of this all-digital broadband microwave transmitter embodiment is as follows figure 1 As shown, including automatic gain controller, signal spectrum level detector, broadband frequency band splitter, 25 level adjusters, combiner, power boost stage, power amplifier stage, high power combiner, transmit output, center A monitoring device and a power supply device for supplying power to each circuit module.

[0028] The broadband multi-channel signal at the input end is connected to the broadband frequency band splitter after the automatic gain controller, and the 25 frequency bands output by the broadband frequency band splitter are respectively connected to 25 independent level regulators, and the 25 level regulators are connected to the combiner After the combiner, the power booster stage, the power amplifier stage, and the high-power combiner are connected to the transmitting output end in...

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Abstract

The invention discloses a full-digital broadband microwave emitter and a control method thereof. A broadband frequency band divider of the emitter divides input signals; n output frequency bands are connected with n independent level regulators respectively; each level regulator is connected to a combiner and then is connected with an emission output end through a power amplifier and the like; and an automatic gain controller and the output end of the power amplifier are connected to a spectral level detector connected with a central monitoring device; and a control end of the central monitoring device is connected with each level regulator, the power amplifier and the automatic gain controller respectively. The control method comprises that: according to level signals of the level detector and the slope of the level gain polygonal line of each frequency band, the central monitoring device regulates gain proportions among the level regulators in real time and suppresses noise intensity while improving the signal level of each frequency band so as to realize the real-time pre-correction control on the emitter. The level gain of each frequency band can be regulated respectively, a working bandwidth is 200 MHz, the noise is effectively reduced, the working efficiency of the amplifier is improved, the full-digital control is adopted, and the implementation is easy.

Description

(1) Technical field [0001] The invention relates to the technical field of microwave transmission, in particular to an all-digital broadband microwave transmitter and a control method thereof. (2) Background technology [0002] The microwave transmitter amplifies the microwave signal and transmits it, and its key component is the microwave power amplifier. [0003] In order to improve the signal-to-noise ratio of microwave power amplifiers, there are usually four methods at home and abroad: first, the power back-off method. That is, the gain of the loss amplifier is exchanged for performance optimization. This method is very simple but the performance improvement effect is not very obvious; second, the negative feedback correction method. Negative feedback correction technology is limited in operating bandwidth due to constraints such as delay and phase shift, which will affect the inherent group delay characteristics of the amplifier. It has strict requirements on phase co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/04H04B7/005
Inventor 彭铁雁李立
Owner 桂林市思奇通信设备有限公司
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