S-band Radar To Launch Research And Design Of The Slip

Receive and transmit channel has a very important role in modern radar system. The performance of the system depends mostly on the design and manufacturing quality of T/R channel. Thus, as the core of radar system, T/R channel's reliability, performance and cost directly affects the success of the whole system.The paper discusses the transmit branch of a certain radar system. The transmit branch is realized by splitter, frequency synthesizer and upconverter. The main work of this paper can be summarized as follows:1. Introduces the development of radar technology, analysis the Transmit channel in radar system design specification based on their development and then, introduction of modern development of relevant technology from both in and outside China is given.2. Introduces related technique of radar system; gives the overall solution for S band radar transmit branch design according to the analysis of design specification and relevant theory.3. Direct frequency synthesize method is used to synthesize the useful signal for the frequency synthesis chain. Before the signal enter frequency synthesis chain, we choose a comb link generator to provide 1GHz, 2.2GHz, 2.3GHz signal, the output power of the three frequency points are 1.5dBm,-8.5dBm,-8.5dBm; According to frequency synthesis theory, a 2.66GHz signal synthesizer link design is discussed and detail introduction of chosen device is given. Test result shows 12dBm output power for 2.66GHz signal, and its phase noise, spurious and harmonic suppression all meet the requirement.4. Based on system specification, the design and hardware realization is given for transmitter up-converter. Test result shows output power≥0dBm for 2.86GHz transmitted signal, the flatness within the band is better than 1.5dB, and phase noise, spurious and harmonic suppression all meet the requirement. 5. Finally, test result for signed splitter module is given on system level; joint testing platform has been established, and all designed functions of the transmit branch are tested in the platform. Testing result shows that, the designed S band radar transmit branch meets the design specification completely.