MI-212 Family of Standard Gain Horns

 

MI-210The MI-212 Family of Standard Gain Horns are used in antenna test range applications, and have been designed to deliver accurate and reliable antenna gain measurements.

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MI-212 Family of Standard Gain Horns (SGH) are available to cover the frequency range from 0.32 to 170 GHz. The horns are constructed of aluminum for waveguide sizes from WR-2300 through WR-62, and from brass for waveguide sizes from WR-51 through WR-7. They are plated prior to painting to prevent corrosion. 

  • Delivers accurate and reliable antenna gain measurements
  • Each horn meets the standards of NRL Report No. 4433
  • Horns available from 0.32 to 170 GHz frequency range
  • Rugged construction ensures long useful life

Gain Accuracy:

Model 12-0.4 through Model 12-1.7 ±0.5 dB
Model 12-2.6 through 12-60 ±0.3 dB 
 

Applications

The primary application for these horns is experimental gain determination of an antenna by the substitution method. Gain measurements with the standard gain horn and antenna under test are made by alternately connecting the two antennas to a matched receiver. Received power levels are equalized either with the precision IF attenuator in the wide range receiver, or with a precision variable RF attenuator.

Each standard gain horn includes a gain chart depicting the horn’s gain across the frequency band it covers.

Assembly

MI-212 Product_Flow

 

The MI-212 Standard Gain Horn product family is divided into several models. Most standard gain horns are available in two configurations:

  • MI-212 Standard Gain Horn (only)
  • MI-210 Standard Gain Horn + Coax-to-Waveguide Adapter (pre-assembled)

Additional Assembly Components:

  • MI-211 Coax-to-Waveguide Adapters (CGWA)1
  • MI-212F Standard Gain Horn Mounting Flanges2
  • MI-212M Standard Gain Horn Mounting Cages2
  • MI-212AP Standard Gain Horn Absorber Panels2
1 MI does not provide Coax-to-Waveguide Adapters beyond 90 GHz.
2 MI-212F, MI-212M and MI-212AP models are shipped ready to install, with all fasteners and installation instructions
 

MI-212 Assembly

 

MI-212M Mounting Flanges and MI-212AP Absorber Panels are not available for MI-212-2.2 Standard Gain Horns and below.

For frequencies up to 90 GHz, MI-211 Family of Coax-to-Waveguide Adapters (CWGA) are available to mate with the MI-212 SGH. An MI-211 CWGA can be ordered pre-assembled to the MI-212 SGH by specifying model MI-210.

Specifications

Model Number Definition (Example: MI-212-0.49)

“MI-212” represents the Standard Gain Horn product line. The number “0.49” represents the lower end of the standard frequency range 0.49 to 0.75 GHz. 

Some low frequency gain horn models are available in 2 physical sizes, with the physically smaller version carrying the designation “RS” at the end, which stands for “reduced size”.

Model Waveguide Type Nominal Gain
(dBi)
Nominal Beamwidth (deg) Frequency Range
(GHz)
Weight - lbs (kg)*
Net Shipping
E-Plane H-Plane
MI-212-0.32-RS WR-2300 10 56 56 0.32 - 0.49 79 (36) 129 (54)
MI-212-0.32 WR-2300 15.5 27 30 0.32 - 0.49 234 (106) 284 (129)
MI-212-0.35-RS WR-2100 10 56 56 0.35 - 0.53 62 (28) 112 (51)
MI-212-0.35 WR-2100 15.5 27 30 0.35 - 0.53 210 (95) 260 (118)
MI-212-0.41-RS WR-1800 10 56 56 0.41 - 0.625 38 (17) 88 (40)
MI-212-0.41 WR-1800 15.5 27 30 0.41 - 0.625 145 (66) 195 (88)
MI-212-0.49-RS WR-1500 10 56 56 0.49 - 0.75 31 (14) 71 (32)
MI-212-0.49 WR-1500 15.5 27 30 0.49 - 0.75 100 (45) 150 (68)
MI-212-0.64 WR-1150 15.5 27 30 0.64 - 0.96 68 (31) 100 (45)
MI-212-0.75 WR-975 15.5 27 30 0.75 - 1.12 28 (13) 38 (17)
MI-212-0.96 WR-770 13.7 35 40 0.96 - 1.45 15 (7) 25 (11)
MI-212-1.1 WR-650 15.5 27 30 1.12 - 1.7 12 (5.4) 22 (10)
MI-212-1.4 WR-510 15.5 27 30 1.45 - 2.2 8 (3.6) 16 (7)
MI-212-1.7 WR-430 15.5 27 30 1.7 - 2.6 5.6 (2.5) 14 (6)
MI-212-2.2 WR-340 15.5 27 30 2.2 - 3.3 3.5 (1.6) 8 (3.6)
MI-212-2.6 WR-284 18 22 23 2.6 - 3.95 5.5 (2.5) 9 (4.1)
MI-212-3.3 WR-229 18 22 23 3.3 - 4.9 3.2 (1.1) 8 (3.6)
MI-212-3.9 WR-187 18 22 23 3.95 - 5.85 2.5 (1.1) 6 (2.7)
MI-212-4.9 WR-159 18 22 23 4.9 - 7.05 1.7 (0.8) 4 (1.8)
MI-212-5.8 WR-137 22.1 12 13  5.85 - 8.2 5 (2.3) 9 (4.1)
MI-212-7.0 WR-112 18 22 23 7.05 - 10.0 0.9 (0.4) 3 (1.5)
MI-212-8.2 WR-90 22.1 12 13 8.2 - 12.4 2.3 (1.0) 6 (2.7)
MI-212-10 WR-75 24.7 9 10 10.0 - 15.0 2.6 (1.2) 6 (2.7)
MI-212-12 WR-62 24.7 9 10 12.4 - 18.0 1.4 (0.6) 5 (2.3)
MI-212-15 WR-51 24.7 9 10 15.0 - 22.0 2.7 (1.2) 6 (2.7)
MI-212-18 WR-42 24.7 9 10 18.0 - 26.5 1.5 (0.7) 5 (2.3)
MI-212-22 WR-34 24.7 9 10 22.0 - 33.0 0.9 (0.4) 3 (1.5)
MI-212-26 WR-28 24.7 9 10 26.5 - 40.0 0.6 (0.3) 3 (1.5)
MI-212-33  WR-22 24.7 9 10 33.0 - 50.0 0.4 (0.2) 3 (1.5)
MI-212-40  WR-19 24.7 9 10 40.0 - 60.0 0.3 (0.2) 1 (0.5)
MI-212-50  WR-15 24.7 9 10 50.0 - 75.0 0.2 (0.1) 1 (0.5)
MI-212-60  WR-12 24.7 9 10 60.0 - 90.0 0.2 (0.1) 1 (0.5)
MI-212-75  WR-10 24.7 9 10 75.0 - 110.0 0.1 (0.05) 1 (0.5)
MI-212-90  WR-8 24.7 9 10 90.0 - 140.0 0.1 (0.05) 1 (0.5)
MI-212-110  WR-7 24.7 9 10 110.0 - 170.0 0.1 (0.05) 1 (0.5)

 

Model

Dimensions - in. (cm)*

Cage Dimensions - in. (cm)*

Cover Flange

Length

Width

Height 

D

Base

Type or
Equivalent

Material

Geometry

MI-212-0.32-RS 36.1 (92) 33.0 (84) 26.8 (68)  16.8 (43) 15.8 x 27.3 (40 x 69) CPR2300F Aluminum  Rectangle 
MI-212-0.32 57.6 (146) 86.8 (220.3) 65.5 (166) 16.8 (43) 15.8 x 27.3 (40 x 69) CPR2300F Aluminum Rectangle
MI-212-0.35-RS 31.4 (80) 30.5 (78) 24.6 (63) 16.0 (41) 16.0 x 25.0 (41 x 64) CPR2100F Aluminum Rectangle
MI-212-0.35 62.0 (157) 73.5 (186) 54.5 (138) 16.0 (41) 16.0 x 25.0 (41 x 64) CPR2100F Aluminum Rectangle
MI-212-0.41-RS 26.5 (67) 25.7 (65) 20.7 (53) 13.7 (35) 12.5 x 21.5 (32 x 55) CPR1800F Aluminum Rectangle
MI-212-0.41  47.0 (119) 67.7 (172)  51.1 (130)  13.7 (35) 12.5 x 21.5 (32 x 55) CPR1800F Aluminum  Rectangle 
MI-212-0.49-RS 26.2 (67) 22.0 (56)  18.3 (46)  13.0 (33) 14.0 x 19.0 (36 x 48) CPR1500F Aluminum  Rectangle 
MI-212-0.49 48.0 (122) 48.7 (124) 36.2 (92)  13.0 (33) 14.0 x 19.0 (36 x 48) CPR1500F Aluminum  Rectangle 
MI-212-0.64 33.8 (86) 43.6 (111) 32.9 (84)  12.6 (32) 9.3 x 15.0 (24 x 38) CPR1150F Aluminum  Rectangle 
MI-212-0.75 32.3 (82) 32.9 (83) 24.4 (62) 9.8 (25) Ø16.0 (41) CPR975F Aluminum  Rectangle 
MI-212-0.96 23.2 (59) 22.2 (56) 16.5 (42)  7.4 (19) Ø12.0 (31) CPR770F Aluminum  Rectangle 
MI-212-1.1 21.7 (55) 22.2 (56) 16.5 (42) 7.4 (19) Ø10.0 (25.4) CPR650F Aluminum  Rectangle 
MI-212-1.4 15.5 (39) 19.3 (49) 14.6 (37) 6.5 (17) Ø9.0 (23) CPR510F Aluminum  Rectangle 
MI-212-1.7 14.4 (37) 14.8 (37) 11.0 (28)  6.4 (16) Ø8.0 (20) CPR430F Aluminum  Rectangle 
MI-212-2.2 10.4 (26) 12.8 (32) 9.7 (25)  6.3 (16) Ø9.0 (23) CPR340F Aluminum  Rectangle 
MI-212-2.6 16.7 (42) 13.1 (33)  9.7 (25) 6.7 (17) Ø8.0 (20) MDL F284ABC Aluminum   Round
MI-212-3.3 12.4 (32) 11.3 (29) 8.8 (22) 6.7 (17) Ø8.0 (20) CPR229F (AL) Aluminum  Rectangle 
MI-212-3.9 12.1 (31) 8.8 (22) 6.6 (17)  6.7 (17) Ø8.0 (20) MDL F187ABC  Aluminum  Round 
MI-212-4.9 9.3 (24) 7.7 (20) 6.0 (15) 6.7 (17) Ø8.0 (20) FTC 159.310-3 Aluminum  Round 
MI-212-5.8 20.0 (51) 11.7 (30) 8.7 (22)  6.7 (17) Ø8.0 (20) MDL F137ABC Aluminum  Round 
MI-212-7.0 7.5 (19) 5.3 (14) 4.0 (10) 6.7 (17) Ø8.0 (20) M3922/54-012 Aluminum  Square 
MI-212-8.2 14.0 (36) 8.0 (20) 6.0 (15) 6.7 (17) Ø8.0 (20) M3922/54-014 Aluminum  Square 
MI-212-10 16.9 (43) 7.0 (18) 5.7 (14) 6.7 (17) Ø8.0 (20) M3922/70-017 Aluminum  Square 
MI-212-12 14.0 (36) 6.2 (16) 5.1 (13)  6.7 (17) Ø8.0 (20) M3922/70-020  Aluminum  Square 
MI-212-15 11.4 (29) 4.7 (12) 3.8 (10)  6.7 (17) Ø8.0 (20) M3922/70-022   Brass Square 
MI-212-18 10.7 (27) 4.2 (11) 3.5 (8.9) 6.7 (17) Ø8.0 (20) M3922/70-027  Brass  Square 
MI-212-22 8.2 (21) 3.2 (8.1) 2.6 (6.6)  6.7 (17) Ø8.0 (20) FTC 34.310-BRASS  Brass  Square 
MI-212-26 7.0 (18) 2.9 (7.4) 2.4 (6.1)  6.7 (17) Ø8.0 (20) M3922/68-001 Brass  Square 
MI-212-33 5.8 (15) 2.3 (5.8) 2.0 (5.1)  6.7 (17) Ø8.0 (20) M3922/67-001 Brass  Round 
MI-212-40 4.7 (12) 1.9 (4.8) 1.5 (3.8) 6.7 (17) Ø8.0 (20) M3922/67-007 Brass  Round 
MI-212-50 3.1 (7.9) 1.6 (4.1) 1.3 (3.3)  6.7 (17) Ø8.0 (20) M3922/67-002  Brass  Round 
MI-212-60 3.2 (8.1) 1.4 (3.4) 1.2 (2.9)  6.7 (17) Ø8.0 (20) M3922/67-003 Brass  Round 
MI-212-75 2.5 (6.4) 1.1 (2.6)  0.9 (2.2) 6.7 (17) Ø8.0 (20) M3922/67-010 Brass  Round 
MI-212-90 2.1 (5.3) 0.9 (2.3)  0.8 (1.9)  6.7 (17) Ø8.0 (20) M3922/67B-M08  Brass  Round 
MI-212-110 1.7 (4.3) 0.8 (1.9)  0.7 (1.6)  6.7 (17) Ø8.0 (20) M3922/67B-M06  Brass  Round 

 MI-212 Dimensions

* All weights and dimensions are approximate