A Method of Radio Frequency Vector Signal Synthesis

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.

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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Problems solved by technology

There are many defects in this structure, it is easy to produce phase error, and there is no negative feedback link, so it cannot be adjusted, and the phase accuracy is low; in reality, there are distribution parameters in electronic components, and when the frequency becomes higher, the effect of distribution parameters will make 90 The ° phase shifter can achieve precise 90° phase shift, so the upper frequency limit of the traditional vector synthesis method is relatively low, the frequency range is relatively narrow, and it is difficult to achieve vector synthesis in the radio frequency segment

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