Amplitude-controllable RF transmission source system

A technology of radio frequency emission and source system, applied in the direction of radio wave measurement system, instrument, etc., can solve the problems of large temperature drift, low precision, poor stability, etc., and achieve the effect of high spectral purity, wide output range, and fast frequency conversion

Pending Publication Date: 2018-12-11
成都意科科技有限责任公司
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Problems solved by technology

[0003] Based on the above technical problems, the present invention provides a radio frequency emission source system with controllable amplitude, thereby solving the technical problems of large temperature drift, low precision and poor stability in previous systems

Method used

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  • Amplitude-controllable RF transmission source system
  • Amplitude-controllable RF transmission source system
  • Amplitude-controllable RF transmission source system

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Embodiment

[0016] like Figure 1-Figure 3 As shown, a radio frequency emission source system with controllable amplitude includes a direct digital frequency synthesizer, a radio frequency amplifier, a digitally controlled attenuator and a video follower connected in sequence, and the direct digital frequency synthesizer and the digitally controlled attenuator are equal to each other. A microcontroller is connected, and the direct digital frequency synthesizer is also connected with a constant temperature crystal oscillator; the microcontroller is also connected with an encoder, a serial port and a digital tube; the video follower is provided with an antenna; the constant temperature crystal The temperature drift of the oscillator is less than 0.5ppb; the microcontroller is a CC2530F256 microprocessor.

[0017] This embodiment adopts the high stable constant temperature crystal oscillator (OCXO) with temperature drift less than 0.5ppb as the clock of the direct digital frequency synthesiz...

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Abstract

The invention relates to an amplitude-controllable RF transmission source system comprising a direct digital frequency synthesizer, an RF amplifier, a digitally controlled attenuator and a video follower which are in signal connection successively, wherein the direct digital frequency synthesizer and the digitally controlled attenuator are both connected with a microcontroller; and the direct digital frequency synthesizer is also connected to an constant-temperature crystal oscillator. The amplitude-controllable RF transmission source system ensures the stability and accuracy of RF signal output by the constant-temperature crystal oscillator, can realize the advantages of fast frequency conversion, high resolution, high spectrum purity and a wide frequency output range by using the directdigital frequency synthesizer, reduces temperature drift, and achieves a wide frequency output range, amplitude-adjustable frequency, and high-precision and high-stability RF signal output.

Description

technical field [0001] The invention relates to a signal processing system, which belongs to the technical field of photoelectric signal detection, and more specifically relates to a radio frequency emission source system with controllable amplitude. Background technique [0002] The radio frequency signal source is one of the necessary test and measurement instruments for radio frequency and microwave workers, and is an important part of the modern electronic test system. The telemetry picker test provides reliable standard analog signals for testing various performances of the telemetry picker. It can output radio frequency signals of different frequency ranges according to the user's settings. It mainly outputs radio frequency signals. Of course, with the development of radar and other technologies, higher requirements are put forward for signal sources. The requirements for stability and accuracy are getting higher and higher. The radio frequency signal source is an im...

Claims

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/4008
Inventor 钟杰唐清茂
Owner 成都意科科技有限责任公司
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