Multi-channel broadband power-digitally-adjustable frequency conversion system and control method thereof

Abstract

The invention relates to a multi-channel broadband power-digitally-adjustable frequency conversion system and a control method thereof. The system comprises an FPGA chip, a direct digital frequency synthesizer, a mixer, a switch filter assembly, a temperature compensation attenuator, a first amplifier and a multi-channel power adjustable module. The input end of the direct digital frequency synthesizer is connected with a reference frequency; the output end is connected with the input end of the mixer; the output end of the mixer is connected with the input end of the temperature compensationattenuator through the switch filter assembly. The output end of the temperature compensation attenuator is connected with the input end of the multi-channel power adjustable module through the firstamplifier. The output end of the multi-channel power adjustable module is a radio frequency output end, and the direct digital frequency synthesizer, the frequency mixer, the switch filter assembly and the SPI communication interface of the multi-channel power adjustable module are connected with the I / O port of the FPGA. According to the system, the number of control ports can be reduced, multi-channel radio frequency output can be realized, the channels are mutually independent, the power regulation range is large, the power attenuation can be digitally and accurately controlled, and good spurious suppression is achieved.

Description

technical field [0001] The invention belongs to the technical field of radio frequency circuits and communication control applications, and in particular relates to a multi-channel broadband power digitally adjustable frequency conversion system and a control method thereof. Background technique [0002] With the development of miniaturization and integration, the system functions become more and more complex, and more and more control modules are integrated. For different modules, the register configuration, that is, the required data is different. The traditional method: one is directly in the Change the configuration of the register in the source program, but with the increase of complexity, the traditional method is more cumbersome and error-prone; the second is to control the value of the written register by adding an external control port, but with the increase of the output range and system function Increase, more control ports are required, and by adding port control...

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Problems solved by technology

[0002] With the development of miniaturization and integration, the system functions become more and more complex, and more and more control modules are integrated. For different modules, the register configuration, that is, the required data is different. The traditional method: one is directly in the Change the configuration of the register in the source program, but with the increase of complexity, the traditional method is more cumbersome and error-prone; the second is to control the value of the written register by adding an external control port, but with the increase of the output range and system function Increase, more control ports are required, and by adding port control, the circuit is more complicated, the output signal is more stray, and the precision of digital control of power attenuation is not enough

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