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| The Loop Design and Calibration Method in Pulsed Condition for Phase Noise Measurement |
| YAN Dong-liang |
| Beijng Institute of Radio Metrology & Measurement, Beijng 100854, China |
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Abstract In narrow pulse modulation, the method that the beat shape depart from carrier frequency is reverted by PRFfilter to get main spectrum line during the calibration of phase noise measurement, comparing with traditional way is simple and fast. The PRF filter is used to remove PRF lines and the loop gain is increased to solve the problem which is hard to lock because of decrease of power in loop design in pulse modulation. The pulsed wave at different duty cycle is measured using phase noise measurement systems at different loop bandwidth. The results prove these methods are useful .
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［1］王志田,李宗杨.时间频率计量［M］.北京:原子能出版社,2002,241-272.
［2］阎栋梁.脉冲调制波相位噪声现场测量装置［J］.宇航计测技术,2008,28（3）:22-25. |
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2011, Vol. 32 
