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View Datasheet (pdf)
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Click Charts Below to Enlarge
Range Walk Comparison
RCS VS. Azimuth
Calibrated RCS
ISAR Imaging
RCS VS. Frequency VS. Azimuth
Background Subtraction
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| One-Way Range to Target |
RCS Frequency Bands |
| 0.01–2 GHz |
2–4 GHz |
4–8 GHz |
8–18 GHz |
18–110 GHz |
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Below 30 ft |
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| 30 to 50 ft |
| 50 to 70 ft |
| 70 to 90 ft |
| Above 90 ft |
The following table presents the calculated performance of a Cheetah Cub Measurement System relative to collecting RCS data with a performance network analyzer (PNA) only.
| Calculated RCS Sensitivity (dBsm)1 |
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2 GHz |
6 GHz |
10 GHz |
14 GHz |
18 GHz |
| Cheetah Cub |
-31.0 |
-51.9 |
-52.5 |
-54.1 |
-58.7 |
| PNA Only |
-18.6 |
-21.0 |
-20.3 |
-20.5 |
-24.5 |
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1 - Calculation based on: SNR = 20 dB, Range to target = 30 ft, PNA IFBW = 500 Hz, Antenna efficiency = 55%, Antenna beam width = 11° @ 18 GHz. The calculated sensitivity for the PNA only system is based on the PNA providing +4 dBm power from 2 to 18 GHz.
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The system shown above includes everything needed for making RCS measurements from 2 to 18 GHz. With optional hardware and software, a Cheetah Cub also supports near- and far-field antenna measurements as well as automated phased array tuning. Cheetah Cubs are based on an optimized RF design that maximizes the performance available from a CW measurement system. Most importantly, Cheetah Cubs are backed by System Planning Corporation’s 25 years of experience. Contact SPC to discuss your specific requirements.
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Engineers know that you never get something for nothing. Occasionally, however, the laws of physics are kind, and a particular tradeoff provides significant value. SPC’s Cheetah Cub Measurement System is an example of this. The system relies on software gating instead of hardware gating to provide an unmatched cost-to-performance ratio. Range to target and radio frequency are two of the most important variables when assessing whether an RCS measurement can be made using continuous-wave (CW) illumination. The following graphic indicates the regions within this two-dimensional variable space where CW RCS measurements are useful and highly effective.
