Ka波段低相噪鎖相倍頻源
[Abstract]:In this paper, the phase-locked frequency-hopping source in Ka band is studied, and the principle of phase-locked source and the formation reason of phase-locked noise are analyzed, and how to improve the phase noise is expounded, and the stability reasons of phase-locked source of frequency-hopping are discussed. Based on this, a millimeter wave frequency source has been developed. Chapter one is divided into five parts. The first four parts introduce the characteristics of millimeter wave, the function of millimeter wave frequency synthesizer, the development background of phase-locked technology, the development status of frequency source at home and abroad. Then in the fifth part, the research goal of this paper is put forward. The second chapter mainly introduces the basic theory of PLL, which is divided into four parts. The first part introduces the three main components of PLL, that is, phase detector, loop filter and voltage-controlled oscillator, and analyzes the basic equations of the loop. In the second part, the transfer function of the loop filter is introduced, and the factors affecting the stability of the loop, the performance of the loop capture and the phase noise of the phase-locked loop are analyzed, and the working mechanism of the digital phase-locked loop is introduced in the third part. The fourth part carries on the summary to this chapter. The third chapter mainly introduces the basic theory of frequency multiplier, which is divided into six parts. The first five parts introduce the use of frequency multiplier, the principle of frequency doubling, the classification of frequency multiplier, the basic principle of active frequency multiplier, the main performance index of frequency multiplier. In the sixth part, this chapter is summarized. In chapter 4, the design process of low phase noise phase-locked frequency multiplier in Ka band is introduced, which is divided into eight parts. The first part introduces the technical index of this subject, the second part introduces the various schemes that can realize the subject, and then selects the appropriate design scheme. The third part introduces the selection of main components on the basis of the selected scheme, and the fourth part analyzes the technical index of the subject on the basis of the second part and the third part. In the fifth part, on the basis of the second to the fourth part, the circuit of the phase-locked frequency multiplier is designed, the sixth part mainly introduces the electromagnetic compatibility design of the phase-locked frequency-doubling source, the seventh part mainly introduces the process design of the phase-locked frequency-doubling source. The eighth part carries on the summary to this chapter. The fifth chapter mainly introduces the circuit assembly, product debugging, product test and test results of low phase noise phase-locked frequency multiplier in Ka band. Finally, this chapter is summarized. The sixth chapter is a summary of the full text and future work prospects. Based on the basic principle of phase-locked and frequency-doubling, the frequency hopping signal of Ku band is obtained by phase-locked mode, and then the signal of Ka band is obtained by frequency-doubling. The test results show that the output frequency of the product is 30 ~ 31GHz, the phase noise is -96.98dBc @ 10kHz, and the suppression degree of in-band clutter is 80dB. the technical specifications fully meet the design requirements of a key project.
【學(xué)位授予單位】:電子科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TN911.8
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