What is RCS testing?
Radar Cross Section (RCS) Testing It is the reflection of radar signals back to a radar source that determines to what degree the object is detectable. Significant in military applications, RCS testing allows for development of aircraft with low detectibility, or assists in increasing capacity to detect targets.
What is radar cross section area?
The radar cross section (RCS) of a target is the equivalent area seen by a radar. It is the fictitious area intercepting that amount of power which, when scattered equally in all directions, produces an echo at the radar equal to that from the target.
What is Ratscat?
The National Radar Cross Section (RCS) Test Facility (NRTF) is the premier DoD facility for RCS testing. Formerly known as RATSCAT, which began measuring radar scattering in 1963, it is comprised of two complementary sites, Mainsite and RATSCAT Advanced Measurement System (RAMS).
How is RCS measured?
Not only monostatic but bistatic RCS can be measured by integrating Cassegrain antenna. RCS02 irradiates a rotating sample with plane wave and receives reflected wave at a desired angle. It then executes near-far field conversion on the received data to acquire RCS.
Why is cross section of radar important?
While important in detecting targets, strength of emitter and distance are not factors that affect the calculation of an RCS because RCS is a property of the target’s reflectivity. Radar cross-section is used to detect airplanes in a wide variation of ranges.
What does a negative RCS mean?
Negative numbers in dB just mean a ratio between 1 and 0. Positive numbers mean a ratio greater than 1. RCS is usually in dB square metres so negative dB RCS is an RCS less than 1 square metre.
How can we reduce RCS?
Such aircraft include the F-117A- and B-2-type stealth aircraft. The frontal RCS can be reduced by avoiding shapes and angles of high radar return. Multiple reflections are one of the important factors apart from orientation of the shape and polarisation of the impinging wave.
What is the RCS of F-22?
0.0001~0.0002 sqm
According to November 2005 reports, the US Air Force states that the F-22 has the lowest RCS of any manned aircraft in the USAF inventory, with a frontal RCS of 0.0001~0.0002 sqm, marble sized in frontal aspect.
What is a radar cross-section?
Radar cross-section. Radar cross-section is used to detect airplanes in a wide variation of ranges. For example, a stealth aircraft (which is designed to have low detectability) will have design features that give it a low RCS (such as absorbent paint, flat surfaces, surfaces specifically angled to reflect the signal somewhere other than towards…
What is the RCS of a flat plate radar?
Note that for radar wavelengths much less than the diameter of the sphere, RCS is independent of frequency. Conversely, a square flat plate of area 1 m 2 will have an RCS of σ = 4π A2 / λ2 (where A =area, λ =wavelength), or 13,962 m 2 at 10 GHz if the radar is perpendicular to the flat surface.
How far can a radar target be detected?
The distance at which a target can be detected for a given radar configuration varies with the fourth root of its RCS. Therefore, in order to cut the detection distance to one tenth, the RCS should be reduced by a factor of 10,000.
Who is the author of the book radar cross section?
Shaeffer, Tuley and Knott. Radar Cross Section. SciTech Publishing, 2004. ISBN 1-891121-25-1. Harrington, Roger F. Time-Harmonic Electromagnetic Fields. McGraw-Hill, Inc., 1961.