|
|
Theta over Phi |
Probe Theta Arch Rolled by Phi |
| |
 |
 |
 |
| AUT Motion |
Phi over Theta |
Phi |
None |
| Probe Motion |
None |
Theta |
Phi & Theta |
| Advantages |
Lowest ceiling clearance |
AUT moves in only 1 axis |
No AUT motion |
| Theta axis |
Vertical |
Horizontal |
Rotating |
| Phi axis |
Horizontal |
Vertical |
Horizontal |
| Typical large SNF scanner M/N |
NSI-700S-75 |
NSI-700S-95 |
NSI-700S-300 |
|
NSI offers a large variety of Spherical Nearfield Antenna Measurement Systems of various sizes and configurations. The most common is the “Phi over Theta” systems (shown below), which rotate the AUT in the Phi direction on an L-bracket and the Phi stage and L bracket are rotated in the azimuth direction to accomplish the Theta motion. In this case, the AUT is required to move for both the Theta and Phi motions, and the probe remains fixed. The next configuration we support is the “Theta over Phi” configuration. (link). In this configuration, the probe is moved in an arc above the antenna to provide the Theta motion, and the AUT is mounted on a positioner on the floor and rotated to provide the Phi motion. A third configuration we support is one we call the “Arch-Roll” configuration, where the probe is moved to provide both the Theta and Phi motions, and the AUT remains fixed. This is ideal when rotating the AUT is difficult or impossible, and only hemispherical measurements are required. See our NSI-700S-300 scanner for an example of this configuration.
For "Theta over Phi" Spherical Near-Field Scanner Models, click here.
|
| Standard
Phi over Theta Spherical Near-Field Scanner Models |
NSI
Scanner Model No. |
NSI-700S-10 |
NSI-700S-20 |
NSI-700S-30 |
NSI-700S-50 |
NSI-700S-60 |
NSI-700S-70 |
NSI-700S-75 |
Photo |
 |
 |
 |
 |
 |
 |
 |
Photo
w/ no absorber |
 |
 |
 |
 |
 |
 |
 |
Orientation |
Phi
over
Theta
(coordinate
system) |
Phi
over
Theta
(coordinate
system) |
Phi
over Theta (coordinate system) |
Phi
over Theta
(coordinate system) |
Phi
over Theta
(coordinate system) |
Phi
over Theta
(coordinate system) |
Phi
over Theta
(coordinate system) |
Material |
Aluminum
Bolted tube
structure |
Aluminum
Bolted tube
structure |
Aluminum
Bolted tube structure |
Aluminum
Bolted tube structure |
Aluminum
2-segment L bracket |
Aluminum
1-segment L bracket |
Aluminum
1-segment L bracket |
THETA
stage
PHI stage
POL stage |
NSI-SC-5501
NSI-SC-5501
NSI-SC-5501 |
NSI-SC-5633
NSI-SC-5632
NSI-SC-5632 |
NSI-SC-5633
NSI-SC-5633
NSI-SC-5633 |
NSI-SC-5635
NSI-SC-5635
NSI-SC-5633 |
NSI-SC-5638
NSI-SC-5635
NSI-SC-5633 |
NSI-SC-5638
NSI-SC-5635
NSI-SC-5633 |
NSI-SC-5638
NSI-SC-5638
NSI-SC-5633 |
AUT
tip support |
NO |
NO |
NO |
NSI-SC-5645(Optional) |
NSI-SC-5645(Optional) |
NSI-SC-5645(Optional) |
NSI-SC-5645(Optional) |
Maximum
AUT diameter |
10"
(0.25 m) |
10"
(0.25 m) |
20"
(0.5 m) |
56"
(1.4 m) |
79"
(2.0 m) |
135"
(3.4 m) |
135"
(3.4 m) |
Theta
span |
360
deg |
360
deg |
360
deg |
360
deg |
360
deg |
360
deg |
360
deg |
Theta
Position Resolution - ½ step |
0.0125
deg |
0.01
deg |
0.0125
deg |
0.01
deg |
0.0015
deg |
0.0015
deg |
0.0015
deg |
Theta
scan speed - Nominal |
10
deg/s |
10
deg/s |
20
deg/s |
10
deg/s |
30
deg/s |
30
deg/s |
4
deg/s |
Phi
span |
360
deg |
360
deg |
360
deg |
360
deg |
360
deg |
360
deg |
360
deg |
Phi
Position Resolution - ½ step |
0.0125
deg |
0.015
deg |
0.0125
deg |
0.01
deg |
0.01
deg |
0.01
deg |
0.0015
deg |
Phi
scan speed - Nominal |
20
deg/s |
30
deg/s |
20
deg/s |
20
deg/s |
20
deg/s |
20
deg/s |
30
deg/s |
Dimensional
information **)
|
Length |
69"
(1.75 m) |
60"
(1.5 m) |
104"
(2.7 m) |
124"
(3.2 m) |
166"
(4.2 m) |
214"
(5.4 m) |
214"
(5.4 m) |
Width |
18"
(0.45 m) |
24"
(0.6 m) |
40"
(1.0 m) |
82"
(2.1 m) |
106"
(2.7 m) |
106"
(2.7 m) |
106"
(2.7 m) |
Height |
64.3"
(1.63 m) |
36"
(0.91 m) |
78"
(2.0 m) |
75"
(1.9 m) |
110"
(2.8 m) |
116"
(2.9 m) |
116"
(2.9 m) |
Phi
stage diameter |
4"
(100 mm) |
4"
(100 mm) |
6"
(150 mm) |
12"
(300 mm) |
12"
(300 mm) |
12"
(300 mm) |
20"
(508 mm) |
Theta
stage diameter |
4"
(100 mm) |
6"
(150 mm) |
6"
(150 mm) |
12"
(300 mm) |
20"
(508 mm) |
20"
(508 mm) |
20"
(508 mm) |
AUT
Weight with C.G. Offset 9" (229mm) |
10
lb (4.5 kg) |
10
lb (4.5 kg) |
40
lbs (18 kg) |
165
lb (75 kg) |
300
lb (136 kg) |
300
lb (136 kg) |
1,000
lb
(454 kg) |
System
Weight |
100
lb (45 kg) |
100
lb (45 kg) |
250
lb (113 kg) |
750
lb (340 kg) |
2,200
lb
(1,000 kg) |
2,500
lb
(1,130 kg) |
2,500
lb
(1,130 kg) |
| Minimum Recommend Room Size **) |
Length |
8'
(2.4 m) |
8'
(2.4 m) |
18'
(5.5 m) |
20'
(6.1 m) |
24'
(7.3 m) |
28.3'
(8.6 m) |
28.3'
(8.6 m) |
Width |
8'
(2.4 m) |
8'
(2.4 m) |
10'
(3.0 m) |
12'
(3.7 m) |
14'
(4.3 m) |
15.5'
(4.7 m) |
15.5'
(4.7 m) |
Height |
6'
(1.8 m) |
6'
(1.8 m) |
10'
(3.0 m) |
10'
(3.0 m) |
13'
(4.0 m) |
15.67'
(4.8 m) |
15.67'
(4.8 m) |
| NSI Standard
Chamber size, using 12" absorber **) |
Length |
12'
(3.6 m) |
12'
(3.6 m) |
18'
(5.5 m) |
26'
(7.9 m) |
26'
(7.9 m) |
26'
(7.9 m) |
26'
(7.9 m) |
Width |
12'
(3.6 m) |
12'
(3.6 m) |
10'
(3.0 m) |
20'
(6.1 m) |
20'
(6.1 m) |
20'
(6.1 m) |
20'
(6.1 m) |
Height |
12'
(3.6 m) |
12'
(3.6 m) |
10'
(3.0 m) |
16'
(4.9 m) |
16'
(4.9 m) |
16'
(4.9 m) |
16'
(4.9 m) |
Model
Number |
NSI-CH-12C |
NSI-CH-12C |
NSI-CH-18R |
NSI-CH-26R |
NSI-CH-26R |
NSI-CH-26R |
NSI-CH-26R |
| NSI
Standard Chamber size, using 18" absorber **) |
Length |
12'
(3.6 m) |
12'
(3.6 m) |
18'
(5.5 m) |
30'
(9.1 m) |
30'
(9.1 m) |
30'
(9.1 m) |
30'
(9.1 m) |
Width |
12'
(3.6 m) |
12'
(3.6 m) |
10'
(3.0 m) |
24'
(7.3 m) |
24'
(7.3 m) |
24'
(7.3 m) |
24'
(7.3 m) |
Height |
12'
(3.6 m) |
12'
(3.6 m) |
10'
(3.0 m) |
20'
(6.1 m) |
20'
(6.1 m) |
20'
(6.1 m) |
20'
(6.1 m) |
Model
Number |
NSI-CH-12C |
NSI-CH-12C |
NSI-CH-18R |
NSI-CH-30R |
NSI-CH-30R |
NSI-CH-30R |
NSI-CH-30R |
**)
Exact dimensions are dependant on specific configurations, and
as such may vary.
For a quick index of all NSI scanners, click here |
Near-field Systems