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J Electromagn Eng Sci > Volume 9(3); 2009 > Article
Journal of the Korean Institute of Electromagnetic and Science 2009;9(3):118-123.
DOI: https://doi.org/10.5515/JKIEES.2009.9.3.118   
A Design and Measurement of a Reference Signal Generator for a Radar System
Dong-Sik Kim1, Min-Chul Kim1, Su-Ho Lee1, Seung-Hun Baik1, Ho-Sang Kwon2, Myung-Deuk Jeong2
1Department of Microwave Lab., LIGXex1
2Agency for Defense Development
Abstract
This paper discusses the design and fabrication of a reference signal generator for a naval radar system, including the vibration environment test. The transmit signals of the S-band radar system are synthesized by the reference signal and the phase noise must lower than - 130 dBc/Hz at a 10 kHz offset frequency. To achieve this specification, the phase noise of the reference signal needs to be less than -165 dBc/Hz at a 10 kHz offset. For achieving very low phase noise performance by the reference signal generator, the phase locked loop technique is applied with a 10 Hz loop bandwidth. Also, this reference signal generator has ${pm}0.35;ppb$ short-term stability to minimize instant phase errors and high vibration sensitivity against a ship's shaking, unbalanced rotating of antennas and so on.
Key words: Radar System, Phase Noise, Spurious, Vibration, Stability

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