Assessing and Improving Radar System Performance
●As derived in Part 1 of this series, the radar range equation captures the essential variables that define the maximum distance at which a given radar system can detect objects of interest. Because the variables relate directly to the major sections of the system block diagram, they provide a powerful framework for the essential process of understanding, characterizing and verifying the actual performance of any radar.
Parts 2 and 3 defined the pulsed radar signal, described ways to measure the power in those signals, and presented readily available ways to measure the essential characteristics of pulsed signals: frequency, timing, power and spectrum. Part 4 examined the use of vector signal analysis (VSA) and wideband instruments—via signal analyzers and oscilloscopes—to measure frequency, phase, and more, in today’s increasingly complex radar signals. Part 5 provided a closer look at the testing, analysis and optimization of the components and subassemblies used in today’s radar systems. In Part 6 the focus was on the best ways to test antennas and antenna arrays, surveying the narrowband and wideband measurements that can be made with vector network analyzers and multi-channel digitizer-based systems.
Continuing our discussion of practical test methods, we’ll now explore three ways to assess and improve radar system performance: noise figure, time sidelobe level and phase noise. Noise figure has a direct effect on receiver performance; time sidelobe level affects spatial resolution, dynamic range, and more; and phase noise causes sidebands that reduce signal-to-noise ratio. This note presents a variety of ways to measure and characterize each of these parameters.
●The radar series
■This application note is the seventh in a series that delves into radar systems and the associated measurement challenges and solutions. Across the series, our goal is to provide a mix of timeless fundamentals and emerging ideas.
In each note, many of the sidebars highlight solutions—hardware and software—that include future-ready capabilities that can track along with the continuing evolution of radar systems.
Whether you read one, some or all of the notes in the series, we hope you find material—timeless or timely—that is useful in your day-to-day work, be on it new designs or system upgrades.
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X-Series 、 NFA 、 N9069C 、 16900 、 N9068A 、 N9068B 、 E5052B 、 E5053A 、 11970 、 E5505A 、 PNA-X 、 E5500 |
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Noise Sources 、 Noise Figure Analyzers 、 Microwave Network Analyzer 、 Signal Source Analyzer |
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[ Radar System ] |
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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December 1, 2017 |
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5992-2155EN |
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3 MB |
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