A Method of Radio Frequency Vector Signal Synthesis

A vector signal and radio frequency signal source technology, applied in the field of signal processing, can solve the problems of difficult radio frequency segment vector synthesis, low phase accuracy, and low frequency upper limit, and achieve flexible adjustment methods, high precision, and improved common mode rejection ratio Effect

CN103944536BInactive Publication Date: 2017-04-05CHANGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-04-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the field of signal processing technologies, and particularly relates to a synthesis method for radio frequency vector signals. Figure 1 is a vector sketch. Vector signal synthesis is one of the key technologies in the signal technology field, and is widely used in electronic circuit systems and modern electronic equipment. Particularly, instruments and meters and electronic measurement have very high requirements on parameters of a vector signal synthesizer like frequency range, accuracy, stability and so on. Therefore, the synthesis method for the vector signals becomes the major research object of research and development of some measuring instruments. The synthesis method for the radio frequency vector signals comprises a radio frequency signal source module, an input direct current level, a level conditioning module, an adjusting module, a Gilbert multiplier module, an orthogonal vector synthesis module, a negative feedback module, an analog-digital (AD) conversion module, and an output amplification module. Compared with conventional vector synthesis methods, the synthesis method for the radio frequency vector signals can synthesize vector signals which have high frequency, high accuracy, and good phase traceability.
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Description

technical field

[0001] The invention relates to the technical field of signal processing, in particular to a method for synthesizing radio frequency vector signals. Background technique

[0002] Vector signal synthesis is one of the key technologies in the field of signal technology. Vector signal synthesizers are widely used in the development of electronic circuit systems and electronic products, and can be found in many modern electronic devices. figure 1 For vector illustration. Especially in the field of instrumentation and electronic measurement, the requirements for the frequency range, precision, stability and other parameters of the vector signal synthesizer are particularly high. Therefore, the vector signal synthesizer becomes the core of some measuring instruments.

[0003] Traditional vector synthesis methods, such as figure 2 As shown, it consists of a signal source, a 90° phase shifter, a mixer and an adder. In the horizontal component branch, the signal ...

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Embodiment Construction

[0028] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0029] Step 1: Send the input to the CPU through the AD converter 1, and the CPU calculates its phase angle θ in , and store the amplitude and phase angle, and the CPU formulates an adjustment scheme to determine the value of the DA conversion module (ADJ);

[0030] The second step: the level adjustment module adds the horizontal component, the vertical component and the value of the DA conversion module (ADJ) and adjusts it, and outputs it to the multiplier after adjustment;

[0031] Step 3: The multiplier multiplies the output of the radio frequency signal source module and the output of the level conditioning module and sends the result to the orthogonal v...