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RF Products Probes

Open Ended Waveguide (OEWG) Probes

NSI's open-ended waveguide probes have been specifically designed for near-field measurements.

All probes are standard WR waveguide bands and are supplied with a mounting flange, coaxial transition (for probes below 50 GHz only), absorber, and aperture cover unless otherwise noted.

The NSI 2000 software includes a built-in open-ended waveguide probe model based on a NIST algorithm (Yaghjian-1983).

The gain of the OEWG probes are typically in the range of 4 dBi to 6 dBi. NSI can provide optional probe calibration if accurate probe gain values are needed, and the gain calibration uncertainty will be approximately +/-0.15 dB.

Please call the NSI sales department for your custom probe needs.

Features:
  • Tapered ends to minimize diffraction effects
  • Standard mounting fits all NSI scanners
  • Polyurethane white paint
  • Waveguide to coaxial transition included (for probes below 50 GHz)
  • Absorber included

 

 
Probe Assembly Dimensions and Weight
NSI Model Frequency
GHz
Depth
in. (mm)
Diam.
in. (mm)
Length
in. (mm)
H
in. (mm)
W
in. (mm
Connector Weight
lb (kg)
NSI-RF-WR1500 0.49 - 0.75 18 (457) 24 (610) 42.2 (1072) 7.50
(190.50)
15.00
(381)
SMA (f) 42.4 (19.2)
NSI-RF-WR975 0.75 - 1.12 18 (457) 24 (610) 42.1 (1069) 4.88
(125.95)
9.75
(247.7)
SMA (f) 37.8 (17.1)
NSI-RF-WR770 0.96 - 1.45 18 (457) 24 (610) 47.1 (1196) 3.85
(97.79)
7.70
(195.58)
SMA (f) 34.5 (15.7)
NSI-RF-WR650 1.12 - 1.7 12 (305) 24 (610) 42.2 (1072) 3.25
(1072)
6.50
(165.1)
SMA (f) 20.7 (9.4)
NSI-RF-WR510 1.45 - 2.2 12 (305) 24 (610) 35.0 (889) 2.55
(64.77)
5.10
(129.54)
SMA (f) 19.0 (8.6)
NSI-RF-WR430 1.7 - 2.6 12 (305) 24 (610) 30.9 (785) 2.15
(54.61)
4.30
(109.22)
SMA (f) 14.0 (6.4)
NSI-RF-WR340 2.2 - 3.3 12 (305) 24 (610) 27.9 (708) 1.70
(43.18)
3.40
(86.36)
SMA (f) 12.6 (5.7)
NSI-RF-WR284 2.6 - 3.95 8 (203) 12 (305) 23.8 (603) 1.34
(34.03)
2.84
(72.14)
SMA (f) 5.4 (2.4)
NSI-RF-WR229 3.3 - 4.9 8 (203) 12 (305) 21.8 (552) 1.15
(29.21)
2.29
(58.17)
SMA (f) 4.7 (2.1)
NSI-RF-WR187 3.95 - 5.85 5 (127) 12 (305) 18.6 (473) 0.87
(22.10)
1.87
(47.50)
SMA (f) 2.7 (1.2)
NSI-RF-WR159 4.9 - 7.5 5 (127) 12 (305) 18.6 (473) 0.80
(20.06)
1.59
(40.39)
SMA (f) 2.7 (1.2)
NSI-RF-WR137 5.85 - 8.2 5 (127) 12 (305) 17.6 (448) 0.62
(15.80)
1.37
(34.79)
SMA (f) 2.7 (1.2)
NSI-RF-WR112 7.05 - 10 5 (127) 12 (305) 17.6 (448) 0.50
(12.7)
1.12
(8.44)
SMA (f) 2.7 (1.2)
NSI-RF-WR90 8.2 - 12.4 3 (76) 10(250) 17.5 (445) 0.40
(10.16)
0.90
(22.86)
SMA (f) 2.1 (0.94)
NSI-RF-WR75 10 - 15 3 (76) 10(250) 17.5 (445) 0.38
(9.53)
0.75
(19.05)
SMA (f) 2.0 (0.9)
NSI-RF-WR62 12.4 - 18 3 (76) 10(250) 17.5 (445) 0.31
(7.90)
0.62
(15.80)
SMA (f) 2.0 (0.9)
NSI-RF-WR51 15 - 22 3 (76) 10(250) 17.5 (445) 0.26
(6.48)
0.51
(12.95)
Hi Freq.
SMA (f)**
2.0 (0.9)
NSI-RF-WR42 18 - 26.5 3 (76) 10(250) 15.5 (394) 0.17
(4.32)
0.42
(10.67)
Hi Freq.
SMA (f)**
2.0 (0.9)
NSI-RF-WR34 22 - 33 3 (76) 10(250) 15.5 (394) 0.17
(4.32)
0.34
(8.64)
2.9 mm
"K" (f)
1.9(0.9)
NSI-RF-WR28 26.5 - 40 3 (76) 10(250) 15.5 (394) 0.14
(3.56)
0.28
(7.11)
2.9 mm
"K" (f)
1.9(0.9)
NSI-RF-WR22 33 - 50 3 (76) 10(250) 15.5 (394) 0.11
(2.85)
0.22
(5.69)
2.4 mm
"V" (f)
1.9(0.9)

** Note: Connector is Macom part #2752-1201-00