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Description
The RF Anechoic Chamber is 56 feet long by 12 feet high by 13.5
feet wide, with an adjoining electronic computer control room. A
double door entrance at one end of the Chamber allows for access to
enable the mounting of test items onto a remotely controlled
positioner. A single door on the other end allows access onto a
three-foot ramp to enable adjustments of the microwave antenna
source hardware. Other than these two access areas, all of the
interior walls including ceiling, sides and floor are covered with
18-inch thick anechoic absorber material. The chamber was uniquely
designed to test projectiles from 20mm to 8 inches in diameter and
utilized to provide radar characteristic measurements and data on
these projectiles.
This test facility can resolve projectile target measurements to a
resolution of 5 centimeters for a radiation frequency span of from
1 to 18 GHz. In addition, the angle positioner resolution is 0.01
degrees and spatial resolution is maintained within a minimum
discernable S/N level of -60dBsm.
The information gathered within this chamber relates to the
amplitude of a projectile's radar reflection as it rotates within
the radar beam. This also includes measurement/evaluation of
stealth capabilities of items under test. Additional functionality
of the Anechoic Chamber includes the ability to make simple antenna
beam pattern measurements, useful for identity antenna beam nulls
and overall operation of an antenna. Frequency ranges for this test
scenario include: 1) 100 MHz through 22 GHz in both the E and H
planes; 2) the capability of RF emission and susceptibility
measurements for electronic equipment within the 100 MHz through 22
GHz frequency range.