Field Strength Impact Of The High-frequency Receiver Sensitivity

As the information technology advances, weapons continuously improve the performance of anti-jamming capability. The modern battlefield, the strong electromagnetic environment and raising the level of electronic countermeasures which require ammunition has a good anti-electromagnetic interference capability. Therefore, components of ammunition in the detection increasingly need for anti-jamming capability. Proximity fuze as a new component of ammunition in the detection, we must take the necessary anti-interference measures. Sensitivity is not only one of the major technical indicators of the proximity fuse, but also reflects the fuse of the anti-interference performance. Sensitivity testing is to ensure an important means of product performance. Radio fuze developed rapidly in recent years, but on the sensitivity of radio fuze system is still relatively small, so reasching the sensitivity of radio fuze system has a great practical significance. Two high-frequency receiver have selected which are pagers and radio fuse and test their sensitivity.Through the pager sensitivity tests give the high-frequency sensitivity of the test receiver sensitivity of the test design, and analysing the sensitivity of the test results in different field intensities pager, after testing the sensitivity of radio fuze provides a good testing program.In addition, this paper also studys several major parts of the radio fuse, and uses Protel 99 SE software to simulate the whole circuit radio fuze.As fuze deviation of radio transceivers and signal processing circuitry of the study give the various parts of the simulation design and the actual circuit, make of circuit boards and uses for sensitivity testing.Thesis focuses on the radio fuze sensitivity test. Due to fuze system a variety of radio fuze testing techniques is different, the sensitivity definition and test methods, test equipment are also different. Thesis focused on studying the specific testing method of the sensitivity of the radio fuze in shielded box. The test system consists of signal generator, radio fuse, shielding box and the oscilloscope so on. According to Pager sensitivity testing and in shielded box the testing method of the radio fuse sensitivity test self-sensitivity of radio fuze circuit, finally obtains self-Gao-frequency receiver sensitivity results.