Standard Gain Horns

NSI offers a complete line of Standard Gain Horn (SGH) antenna for gain calibration by the substitution method. All NSI SGHs are designed and built to meet the requirements of NRL Report 4433 and include theoretical gain versus frequency curves. Frequency coverage is based on standard "WR" waveguide bands.

Features:
Frequency coverage from 0.96 to 40 GHz
Includes waveguide to coaxial transition
Includes mounting flange
Include theoretical data for gain relative to an isotropic radiator (dBi) versus frequency.
Constructed on aluminum with a paint/iridite finish.
Typical gain accuracy 0.5 dB

Gain reference measurements are made by measuring the power of levels of both the antennas under test and a SGH. The Gain, in decibels, of the AUT can be calculated by using the expression:

GAUT = GSGH Theoritical + (PAUT measured - PSGH Measured)

Where:
GAUT = Calculated gain of the AUT (in dBi)
GSGH Theoritical = Theoritical gain of the SGH (in dBi)
PAUT Measured = Measured power of the AUT (in dB)
PSGH Measured = Measured power of the SGH (in dB)

Care must be taken to match the line and inputs of both the AUT and SGH to obtain accurate results.

NSI Model Frequency (Ghz) Waveguide Band Nominal Gain (dBi) Weight Height Width Length Connector
NSI-RF-SG1500 0.49 - 0.75 WR1500 14 123 lb
(55.9 kg)
36.09 in (91.7 cm) 48.59 in (123.4 cm) 59.03 in (149.9 cm) N (f)*
NSI-RF-SG975 0.75 - 1.12 WR975 14 21.0 lb
(9.5 kg)
19.86 in (50.4 cm) 22.83 in (58.0 cm) 23.70 in (60.2 cm) N (f)*
NSI-RF-SG770 0.96 - 1.45 WR770 14 17.0 lb
(7.7 kg)
16.25 in (41.3 cm) 21.93 in (55.7 cm) 23.20 in (58.9 cm) N (f)*
NSI-RF-SG650 1.12 - 1.7 WR650 16 14.0 lb
(6.3 kg)
16.25 in (41.3 cm) 21.93 in (55.7 cm) 21.80 in (55.4 cm) N (f)*
NSI-RF-SG510 1.45 - 2.2 WR510 16 10.0 lb
(4.5 kg)
12.75 in (32.4 cm) 17.2 in (43.7 cm) 17.10 in (43.4 cm) N (f)*
NSI-RF-SG430 1.7 - 2.6 WR430 16  6.5 lb
(2.9 kg)
10.75 in (27.3 cm) 14.51 in (36.9 cm) 14.40 in (36.6 cm) N (f)*
NSI-RF-SG340 2.2 - 3.3 WR340 16  4.5 lb
(2.0 kg)
8.50 in (21.6 cm) 11.47 in (29.1 cm) 11.40 in (29.0 cm) SMA (f)
NSI-RF-SG284 2.6 - 3.95 WR284 18  6.5 lb
(2.9 kg)
9.45 in (24.0 cm) 12.76 in (32.4 cm) 20.70 in (52.6 cm) SMA (f)
NSI-RF-SG229 3.3 - 4.9 WR229 18  4.5 lb
(2.0 kg)
7.62 in (19.4 cm) 10.29 in (26.1 cm) 16.70 in (42.4 cm) SMA (f)
NSI-RF-SG187 3.95 - 5.85 WR187 18  3.2 lb
(1.5 kg)
6.30 in (16.0 cm) 8.51 in (21.6 cm) 13.10 in (33.3 cm) SMA (f)
NSI-RF-SG159 4.9 - 7.05 WR159 18  2.3 lb
(1.0 kg)
5.29 in
(13.4 cm)
7.14 in
(18.1 cm)
11.60 in
(29.5 cm)
SMA (f)
NSI-RF-SG137 5.85 - 8.2 WR137 22 6.0 lb
(2.7 kg)
8.42 in
(21.4 cm)
11.36 in
(28.9 cm)
20.40 in
(51.8 cm)
SMA (f)
NSI-RF-SG112 7.05 - 10 WR112 18 2.0 lb
(0.9 kg)
3.73 in
(9.5 cm)
5.04 in
(12.8 cm)
9.40 in
(23.9 cm)
SMA (f)
NSI-RF-SG90 8.2 - 12.4 WR90 22 3.0 lb
(1.4 kg)
5.67 in
(14.4 cm)
7.65 in
(19.4 cm)
14.90 in
(37.8 cm)
SMA (f)
NSI-RF-SG75 10 - 15 WR75 25 3.5 lb
(1.6 kg)
5.94 in
(15.1 cm)
7.24 in
(18.4 cm)
18.90 in
(48.0 cm)
SMA (f)
NSI-RF-SG62 12.4 - 18 WR62 25 3.0 lb
(1.4 kg)
4.91 in
(12.5 cm)
5.98 in
(15.2 cm)
15.60 in
(39.6 cm)
SMA (f)
NSI-RF-SG51 15 - 22 WR51 25 2.3 lb
(1.0 kg)
4.04 in
(10.3 cm)
4.92 in
(12.5 cm)
14.80 in
(37.6 cm)
HF SMA (f)
NSI-RF-SG42 18 - 26.5 WR42 25 1.5 lb
(0.7 kg)
3.28 in
(8.3 cm)
4.00 in
(10.2 cm)
11.20 in
(28.4 cm)
HF SMA (f)
NSI-RF-SG34 22 - 33 WR34 25 1.3 lb
(0.6 kg)
2.69 in
(6.8 cm)
3.28 in
(8.3 cm)
9.60 in
(24.4 cm)
2.9 mm (f)
NSI-RF-SG28 26.5 - 40 WR28 25 1.1 lb
(0.5 kg)
2.23 in
(5.7 cm)
2.72 in
(6.9 cm)
7.50 in
(19.1 cm)
2.9 mm (f)
33 - 50 WR22 25 0.2 lb
(0.1 kg)
2.05 in
(5.2 cm)
2.17 in
(5.5 cm)
6.53 in
(16.6 cm)
None
(flange only)
40 - 60 WR19 25 0.2 lb
(0.1 kg)
1.67 in
(4.2 cm)
1.75 in
(4.4 cm)
6.00 in
(15.2 cm)
None
(flange only)
50 - 75 WR15 25 0.2 lb
(0.1 kg)
1.26 in
(3.2 cm)
1.38 in
(3.5 cm)
4.06 in
(10.3 cm)
None
(flange only)
NSI-RF-SG12 60 - 90 WR12 25 0.2 lb
(0.1 kg)
1.14 in
(2.9 cm)
1.22 in
(3.1 cm)
3.55 in
(9.02 cm)
None
(flange only)
75 - 110 WR10 25 0.2 lb
(0.1 kg)
0.75 in
(1.9 cm)
0.98 in
(2.5 cm)
3.59 in
(9.1 cm)
None
(flange only)
110 - 170 WR6 23 0.04 lb
(0.02 kg)
0.48 in
(1.2 cm)
0.63 in
(1.6 cm)
1.26 in
(3.2 cm)
None
(flange only)

+ W and H are inside dimensions

* Note - N (m) to SMA (f) adapter included

H-cut plot contour plot V-cut plot

 

 

Ordering Information:

NSI-RF-SGXXX
Standard Gain Horn - Includes standard gain horn, waveguide to coaxial transition(for horns below 40 GHz), mounting flange, theoretical gain curves and outline and mounting drawing.

Options:
Contact NSI for different connector options.

Credit Cards accepted. To request pricing email: sales@nearfield.com
Nearfield Systems, Incorporated
19730 Magellan Drive,
Torrance, CA 90502, USA, Tel: 310.525.7000, Fax: 310.525.7102
Email: sales@nearfield.com. Visit our website: www.nearfield.com