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.

NSI also offers 0.75 to 50 GHz ridged waveguide probes for broadband near-field measurements as well as a line of dual pol log periodic probes from 0.15 to 26.5 GHz. 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
Model Frequency Range "D"
Absorber Depth		 "L"
Probe Length		 "W"
Absorber Size 		Transition Assembly Weight**
GHz in. (mm) in. (mm) in. (mm) lb. (kg)
NSI-RF-WR1500 0.49 - 0.75 18
(457)		 32
(813) 		24
(610) 		SMA (f) 31.0
(14.1)
NSI-RF-WR975 0.75 - 1.12 18
(457) 		32
(813) 		24
(610) 		SMA (f) 31.0
(14.1)
NSI-RF-WR770 0.96 - 1.45 18
(457) 		37
(940) 		24
(610) 		SMA (f) 29.0
(13.2)
NSI-RF-WR650 1.12 - 1.7 12
(305)		 32
(813) 		24
(610) 		SMA (f) 23.0
(10.4)
NSI-RF-WR510 1.45 - 2.2 12
(305)		 25
(635)		 24
(610)		 SMA (f) 20.0
(9.1)
NSI-RF-WR430 1.7 - 2.6 12
(305)		 21
(533)		 24
(610) 		SMA (f) 11.0
(5.0)
NSI-RF-WR340 2.2 - 3.3 12
(305) 		18
(457) 		24
(610) 		SMA (f) 10.0
(4.5)
NSI-RF-WR284 2.6 - 3.95 8
(203)		 14
(356)		 12
(305) 		SMA (f) 4.1
(1.9)
NSI-RF-WR229 3.3 - 4.9 8
(203) 		12
(305) 		12
(305) 		SMA (f) 3.6
(1.6)
NSI-RF-WR187 3.95 - 5.85 5
(127)		 9
(229) 		12
(305) 		SMA (f) 1.8
(0.8)
NSI-RF-WR159 4.9 - 7.05 5
(127)		 8
(203) 		12
(305) 		SMA (f) 1.7
(0.8)
NSI-RF-WR137 5.85 - 8.2 5
(127)		 8
(203) 		12
(305) 		SMA (f) 1.6
(0.7)
NSI-RF-WR112 7.05 - 10 5
(127) 		8
(203) 		12
(305) 		SMA (f) 1.6
(0.7)
NSI-RF-WR90 8.2 - 12.4 3
(76)		 6
(152) 		12
(305) 		SMA (f) 1.2
(0.5)
NSI-RF-WR75 10 - 15 3
(76)		 6
(152) 		12
(305) 		SMA (f) 1.2
(0.5)
NSI-RF-WR62 12.4 - 18 3
(76)		 6
(152) 		12
(305) 		SMA (f)  1.1
(0.5)
NSI-RF-WR51 15 - 22 3
(76)		 6
(152) 		12
(305)		 High Freq.
SMA (f)***		 1.1
(0.5)
NSI-RF-WR42 18 - 26.5 3
(76)		 6
(152)		 12
(305) 		High Freq.
SMA (f)***		 1.1
(0.5)
NSI-RF-WR34 22 - 33 3
(76)		 6
(152) 		12
(305) 		2.9 mm
"K" (f)		 1.1
(0.5)
NSI-RF-WR28 26.5 - 40 3
(76)		  6
(152)		 12
(305)		 2.9 mm
"K" (f)		 1.1
(0.5)
NSI-RF-WR22 33 - 50 3
(76)		  6
(152)		 12
(305)		 2.4 mm
"V" (f)		 1.1
(0.5)
NSI-RF-WR15 50 - 75 3
(76)		 6
(152) 		 12
(305)		 WR15 N/A+
NSI-RF-WR12 60 - 90 3
(76)		  6
(152)		 12
(305)		 WR12 N/A+
NSI-RF-WR10 75 - 110 3
(76) 		6
(152)		 12
(305)		 WR10 N/A+
 
+ Note: These probes do not include mounting brackets.
** Note: Including transition, mounting bracket and absorber.
*** Note: Connector is Macom part # 2752-1201-00
 

Probe Only Dimensions
Model Freqency Range Figure 1. Figure 3.
A B C D E F H W
GHz in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm)
NSI-RF-WR1500
0.49 - 0.75
39.00
(990.6)
32.00
(812.8)
0.63
(15.88)
18.50
(469.9)
11.00
(279.4)
0.406
(10.31)
7.50
(190.50)
15.00
(381)
NSI-RF-WR975
0.75 - 1.12
38.00
(965.2)
32.00
(812.8)
0.50
(12.70)
13.25
(336.6)
8.38
(212.7)
0.397
(10.08)
4.88
(125.95)
9.75
(247.7)
NSI-RF-WR770
0.96 - 1.45
43.00
(1092.2)
37.00
(939.8)
0.50
(12.70)
11.22
(285.0)
7.35
(186.7)
0.397
(10.08)
3.85
(97.79)
7.70
(195.58)
NSI-RF-WR650
1.12 - 1.7
38.00
(965.2)
32.00
(812.8)
0.50
(12.70)
8.69
(220.7)
5.44
(138.2)
0.332
(8.43)
3.25
(82.55)
6.50
(165.1)
NSI-RF-WR510
1.45 - 2.2
31.00
(787.4)
25.00
(635.00)
0.50
(12.70)
8.69
(220.7)
5.44
(138.2)
0.332
(8.43)
2.55
(64.77)
5.10
(129.54)
NSI-RF-WR430
1.7 - 2.6
25.00
(635.0)
21.00
(533.4)
0.50
(12.70)
6.34
(161.0)
4.19
(106.4)
0.266
(6.76)
2.15
(54.61)
4.30
(109.22)
NSI-RF-WR340
2.2 - 3.3
22.00
(558.8)
18.00
(457.12)
0.50
(12.70)
5.44
(138.2)
3.75
(95.3)
0.266
(6.76)
1.70
(43.18)
3.40
(86.36)
 
Model Freqency Range Figure 1. Figure 2.
A B C D E F H W
GHz in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm)
NSI-RF-WR284 2.6 - 3.95 17.00
(431.8) 		14.00
(355.6) 		0.38
(9.65) 		5.31
(134.9) 		4.75
(120.7) 		0.266
(6.76)
1.34
(34.03)
2.84
(72.14)
NSI-RF-WR229 3.3 - 4.9 15.00
(381.0) 		12.00
(304.8)		 0.38
(9.65) 		5.31
(134.9) 		4.75
(120.7) 		0.266
(6.76)
1.15
(29.21)
2.29
(58.17)
NSI-RF-WR187 3.95 - 5.85 12.00
(304.8) 		9.00
(228.6) 		0.38
(9.65) 		4.00
(101.6) 		3.50
(88.9) 		0.189
(4.80)
0.87
(22.10)
1.87
(47.50)
NSI-RF-WR159 4.9 - 7.05 11.00
(279.4)		 9.00
(228.6) 		0.38
(9.65) 		4.00
(101.6) 		3.50
(88.9) 		0.189
(4.80)
0.80
(20.06)

1.59
(40.39)

NSI-RF-WR137 5.85 - 8.2 10.00
(254.0) 		8.00
(203.2) 		0.38
(9.65)		 4.00
(101.6)		 3.50
(88.9)		 0.189
(4.80)

0.62
(15.80)

1.37
(34.79)

NSI-RF-WR112 7.05 - 10 10.00
(254.0)		 8.00
(203.2)		 0.38
(9.65)		 4.00
(101.6)		 3.50
(88.9)		 0.189
(4.80)
0.50
(12.7)
1.12
(8.44)
NSI-RF-WR90 8.2 - 12.4 7.50
(190.5) 		6.00
(152.4) 		0.25
(6.35) 		4.00
(101.6)		 3.50
(88.9)		 0.189
(4.80)
0.40
(10.16)
0.90
(22.86)
NSI-RF-WR75 10 - 15 7.50
(190.5)		 6.00
(152.4)		 0.25
(6.35)		 4.00
(101.6)		 3.50
(88.9)		 0.189
(4.80)
0.38
(9.53)
0.75
(19.05)
NSI-RF-WR62 12.4 - 18 7.50
(190.5)		 6.00
(152.4)		 0.25
(6.35)		 4.00
(101.6)		 3.50
(88.9)		 0.189
(4.80)

0.31
(7.90)
0.62
(15.80)
NSI-RF-WR51 15 - 22 7.50
(190.5)		 6.00
(152.4)		 0.25
(6.35)		 4.00
(101.6)		 3.50
(88.9)		 0.189
(4.80)
0.26
(6.48)
0.51
(12.95)
NSI-RF-WR42 18 - 26.5 7.50
(190.5)		 6.00
(152.4)		 0.25
(6.35)		 4.00
(101.6)		 3.50
(88.9)		 0.189
(4.80)
0.17
(4.32)
0.42
(10.67)
NSI-RF-WR34 22 - 33 7.50
(190.5)		 6.00
(152.4)		 0.25
(6.35)		 4.00
(101.6)		 3.50
(88.9)		 0.189
(4.80)
0.17
(4.32)
0.34
(8.64)
NSI-RF-WR28 26.5 - 40 7.50
(190.5)		 6.00
(152.4)		 0.25
(6.35)		 4.00
(101.6)		 3.50
(88.9)		 0.189
(4.80)
0.14
(3.56)
0.28
(7.11)
NSI-RF-WR22 33 - 50 7.50
(190.5)		 6.00
(152.4)		 0.25
(6.35)		 4.00
(101.6)		 3.50
(88.9)		 0.189
(4.80)
0.11
(2.85)
0.22
(5.69)
NSI-RF-WR15 50 - 75 Contact NSI
0.07
(1.88)
0.15
(3.76)
NSI-RF-WR12 60 - 90
0.06
(1.55)
0.12
(3.10)
NSI-RF-WR10 75 - 110
0.05
(1.27)
0.10
(2.54)
Note: Probe gain is approximately 5dB at the center of the applicable frequency range