A frequency expansion device and a radio frequency system

Abstract

The invention discloses a frequency expansion device and a radio frequency system. The frequency expansion device comprises a straight-through channel for receiving and outputting a first radio frequency input signal of a first frequency band and a spread-spectrum channel for receiving a second radio frequency input signal of a second frequency band and outputting a spread-spectrum signal of a third frequency band, the maximum frequency of the third frequency band being greater than the maximum frequency of the first frequency band. By setting the frequencies of the first radio frequency inputsignal and the second radio frequency input signal to be smaller than the set frequency, attenuation of the spread spectrum signal output from the frequency spreading device can be reduced. At the same time, the spread spectrum channel in the frequency spreading device can spread the second radio frequency input signal in the second frequency band, so that the spread spectrum channel in the frequency spreading device can output the spread spectrum signal in the third frequency band, thereby increasing the frequency range of the spread spectrum signal output by the frequency spreading device.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of frequency extension, and in particular, to a frequency extension device and a radio frequency system. Background technique [0002] The frequency range of radio frequency signals is wide, ranging from several kHz to several GHz, even reaching tens of GHz. Wide range of amplitude output, with various analog modulation and digital modulation functions, widely used in military, communication, teaching and other fields. [0003] With the development of 5G technology, high requirements are placed on the frequency range and analysis bandwidth of RF signals. In the prior art, the digital-to-analog converter in the radio frequency system converts the digital signal sent by the programmable logic processing unit into a radio frequency analog differential signal, because the frequency of the radio frequency analog signal output by the digital-to-analog converter is relatively low, ranging fro...

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Problems solved by technology

In the prior art, the digital-to-analog converter in the radio frequency system converts the digital signal sent by the programmable logic processing unit into a radio frequency analog differential signal, because the frequency of the radio frequency analog signal output by the digital-to-analog converter is relatively low, ranging from 50MHz to 6000MHz , and when the frequency is greater than 4000MHz, the attenuation of the RF analog signal output by the digital-to-analog converter is large.

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