ORBIT FR Rolled Edge Reflectors - Manual (Page 2)

Compact Range Products
2006_1_v1 www.orbitfr.com
Rolled edge reflectors offer unique advantages over the serrated edge technology.
Rolled edge technology is based on the premise of redirecting the energy illuminating
the edge of the reflector to non-critical areas of the anechoic chamber. Appropriately
redirected, the energy can be dissipated without exhibiting significant effects on the
quiet zone performance. This concept, while superior in performance, depends much
more on the quality of the anechoic chamber and absorber treatment in the room.
Limitations in the anechoic performance will result in negation of the rolled edge
advantages.
The rolled edge reflector system, by combining the parabolic central portion of the
reflector with a precisely defined edge surface designed to distribute the edge
currents in an optimal fashion to the benign sections of the room, requires a precisely
manufactured transition region from the core parabola to the edge region. ORBIT/FR
offers the manufacturing technology required to successfully achieve this transition,
thereby avoiding any discontinuities that would result in diffraction which may materially
affect quiet zone performance.
The rolled edge compact range technology offers higher or equivalent level of
performance than serrated edge system at a higher cost than serrated edge
technology in the appropriate anechoic environment.
Consult your ORBIT/FR sales representative for applications information. An ORBIT/
FR applications engineer is available to discuss the comparisons in compact range
technology and offer a solution which will meets your needs.
Rolled-Edge Reflectors
Corner-Fed
AL-25000 Series
AL-25101 AL-25202 AL-25303 AL-25404 AL-25606 AL-25808 AL-251010 AL-251212
Quite Zone Shape CC CC CC CC CC CC CC CC
Frequency Range GHz 8 - 100 4 - 100 3 - 100 2 - 100 1.5 - 100 1 - 100 0.8 - 100 0.7 - 100
Quite Zone
Dimensions
(H x W x L)
m 0.3 x 0.3 x 0.3 0.6 x 0.6 x 0.6 0.9 x 0.9 x 0.9 1.2 x 1.2 x 1.2 1.8 x 1.8 x 1.8 2.4 x 2.4 x 2.4 3.0 x 3.0 x 3.0 3.6 x 3.6 x 3.6
ft 1 x 1 x 1 2 x 2 x 2 3 x 3 x 3 4 x 4 x 4 6 x 6 x 6 8 x 8 x 8 10 x 10 x 10 12 x 12 x 12
Cross Polarization
(typ.)
dB -30 -30 -30 -30 -30 -30 -30 -30
Amplitude Total
Variation
dB
1.9 (8 - 12)
1.7 (12 – 18)
1.9 (4 - 6)
1.7 (6 – 8)
1.9 (3 - 4)
1.7 (4 – 6)
1.9 (2 - 3)
1.7 (3 – 4)
1.9 (1.5 - 2)
1.7 (2 – 3)
1.9 (1 – 1.5)
1.7 (1.5 – 2)
1.9 (0.8 – 1.5)
1.7 (1.5 – 2)
1.9 (0.7 - 1)
1.7 (1 – 1.5)
Amplitude Taper dB 1.0 (> 18) 1.0 (> 8) 1.0 (> 6) 1.0 (> 4) 1.0 (> 3) 1.0 (> 2) 1.0 (> 2) 1.0 (> 1.5)
Amplitude Ripple dB
±0.4 (18-26)
±0.3 (26-40)
±0.4 (40-100)
±0.4 (8-12)
±0.3 (12-40)
±0.4 (40-100)
±0.4 (6-8)
±0.3 (8-40)
±0.4 (40-100)
±0.4 (4-6)
±0.3 (6-26)
±0.4 (26-100)
±0.4 (3-4)
±0.3 (4-26)
±0.4 (26-100)
±0.4 (2-3)
±0.3 (3-20)
± 0.4 (20-100)
±0.4 (2-3)
±0.3 (3-20)
±0.4 (20-100)
±0.4 (1.5-2)
±0.3 (2-20)
±0.4 (20-100)
Phase Total
Variation
deg
12 (8 – 12)
10 (12 – 18)
0.25 * f (> 40)
12 (4 – 6)
10 (6 – 8)
0.25 * f (> 40)
12 (3 – 4)
10 (4 – 6)
0.25 * f (> 40)
12 (2 – 3)
10 (3 – 4)
0.4 * f (> 26)
12 (1.5 – 2)
10 (2 – 3)
0.4 * f (> 26)
12 (1 – 1.5)
10 (1.5 – 2)
0.5 * f (> 20)
12 (1 – 1.5)
10 (1.5 – 2)
0.5 * f (> 20)
12 (0.7 – 1)
10 (1 – 1.5)
0.5 * f (> 20)
Phase Taper deg
± 3 (18-26)
± 2 (26-40)
± 3 (8-12)
± 2 (12-40)
± 3 (6-8)
± 2 (8-40)
± 3 (4-6)
± 2 (6-26)
± 3 (3-4)
± 2 (4-26)
± 3 (2-3)
± 2 (3-20)
± 3 (2-3)
± 2 (3-20)
± 3 (1.5-2)
± 2 (2-20)
Phase Ripple deg ± 3 (18-40) ± 3 (8-40) ± 3 (6-40) ± 3 (4-26) ± 3 (3-26) ± 3 (2-20) ± 3 (2-20) ± 3 (1.5-20)
AL-252020
CC
1 - 40
6.0 x 6.0 x 6.0
20 x 20 x 20
-25
1.9 (1 - 2)
1.0 (> 2)
±0.4 (2-3)
±0.3 (3-20)
±0.4 (20-40)
12 (1 – 1.5)
10 (1.5 – 2)
0.5 * f (> 20)
± 3 (2-3)
± 2 (3-20)
± 3 (2-20)
AL-251216
CC
1 - 40
3.6 x 4.8 x 4.8
12 x 16 x 16
-25
1.9 (1 - 2)
1.0 (> 2)
±0.4 (2-3)
±0.3 (3-20)
±0.4 (20-40)
12 (1 – 1.5)
10 (1.5 – 2)
0.5 * f (> 20)
± 3 (2-3)
± 2 (3-20)
± 3 (2-20)
1. Specifications apply to the full quiet zone at a 95% confidence level
2. () indicates applicable frequency range in GHz for specification