MI-23 Family of Linear Waveguide Feeds

MI-23

The MI-23 Family of Linear Waveguide Feeds are linearly polarized feeds covering the frequency range of 1.1 GHz to 40 GHz. All MI-23 feeds are waveguide horns which are weather sealed with a radome cover. These feeds are designed to be used with the MI-22 Family of Parabolic Reflectors.

downloadpdfThe feed terminating connectors are shown in the table of specifications. Model 23-8.2 through Model 23-26 are provided with a button hook waveguide section to permit a rear waveguide input. To minimize aperture blocking, feeds for the Model 22A-1 reflector are supported beside the reflector, with the waveguide passing around the reflector edge. The MI-211 Family of Coax-to-Waveguide Adapters may be used to provide a coaxial cable input to the waveguide.

  • MI-23 feeds offer wide frequency coverage from 1.1 to 40 GHz
  • Designed for use with MI-22 reflectors
  • Rugged construction ensures a long, useful life

Specifications

Model1

Reflector

Nominal Range
(GHz)

Nominal Gain
(dB)

Beamwidth
(degrees)

Maximum VSWR

Nominal
1st Side Lobe
Suppression
(dB)

Feed Connector Type
or Equivalent

Net Weight lbs
(kg)

Shipping Weight
lbs (kg)

MI-23-1.7/8/10

22-10A

1.70-2.60

33

3.8

1.5

18

UG-437/U

8 (3.6)

20 (9)

MI-23-1.7/8/10

22-8B

1.70-2.60

31

4.6

1.5

18

UG-437/U

8 (3.6)

20 (9)

MI-23-2.6/8

22-8B

2.60-3.95

35

3.1

1.5

18

UG-584/U

4 (1.8)

15 (6.8)

MI-23-3.9/8

22-8B

3.95-5.85

39

2.1

1.5

18

UG-149/U

4 (1.8)

10 (4.5)

MI-23-5.8/8

22-8B

5.85-8.20

42

1.6

1.5

18

UG-441/U

2 (0.9)

5 (2.3)

MI-23-2.6/4/6

22-6B

2.60-3.95

32

4.0

2.0

18

Type N

4 (1.8)

15 (6.8)

MI-23-3.9/4/6

22-6B

3.95-5.85

36

3.0

1.5

18

UG-149/U

4 (1.8)

10 (4.5)

MI-23-5.8/4/6

22-6B

5.85-8.20

39

2.0

1.5

18

UG-441/U

2 (0.9)

5 (2.3)

MI-23-8.2/6

22-6B

8.20-12.4

42

1.5

1.5

18

UG-135/U

5 (2.3)

25 (11.4)

MI-23-2.6/4/6

22-4A

2.60-3.95

29

6.0

2.0

18

Type N

4 (1.8)

15 (6.8)

MI-23-3.9/4/6

22-4A

3.95-5.85

32

4.0

1.5

18

UG-149/U

2 (0.9)

10 (4.5)

MI-23-5.8/4/6

22-4A

5.85-8.20

35

3.0

1.5

18

UG-441/U

2 (0.9)

5 (2.3)

MI-23-8.2/4

22-4A

8.20-12.4

39

2.0

1.5

18

UG-135/U

2 (0.9)

25 (11.4)

MI-23-12/4

22-4A

12.4-18.0

42

1.5

1.5

18

UG-419/U

2 (0.9)

20 (9)

MI-23A-8.2/2

22A-2

8.20-12.4

33

4.0

1.5

15

UG-135/U

3 (1.4)

25 (11.4)

MI-23A-12/2

22A-2

12.4-18.0

36

3.0

1.5

15

UG-419/U

2 (0.9)

20 (9)

MI-23A-12/1

22A-1

12.4-18.0

30

5.0

1.5

18

UG-419/U

1 (0.5)

20 (9)

MI-23A-18/1

22A-1

18.0-26.5

33

4.0

1.5

14

UG-595/U

1 (0.5)

15 (6.8)

MI-23A-26/1

22A-1

26.5-40.0

36

2.5

1.5

14

UG-599/U

1 (0.5)

10 (4.5)

1 Numbers following"/" indicate reflector diameters (in feet) for which the feed is recommended. All specifications define combined performance when installed in a MI-22

Model

Frequency (GHz)

Peak1

Radome Dimensions
in (cm)

Avg.1, 2

Window Thickness

Notes

RX2200
Rexolite

W2 Mylar

MI-23-1.7/8/10

1.7-2.6

18 MW

6.8 X 5.2 (17.3 X 13.2)

15 kW

 

0.005 (0.013)

RG-105/U

MI-23-2.6/4/6

2.6-3.95

2.5 kW

4.5 X 3.3 (11.4 X 8.4)

90 W

 

0.005 (0.013)

Type N/RG-214

MI-23-2.6/8

2.6-3.95

7.6 MW

4.5 X 3.3 (11.4 X 8.4)

10 kW

 

0.005 (0.013)

RG-75/U 6061

MI-23-3.9/4/6

3.95-5.85

3.3 MW

3.0 X 2.2 (7.6 X 5.6)

4 kW

 

0.005 (0.013)

RG-95/U

MI-23-3.9/8

3.95-5.85

3.3 MW

3.0 X 2.2 (7.6 X 5.6)

4 kW

 

0.005 (0.013)

RG-95/U 6061

MI-23-5.8/4/6

5.85-8.2

1.9 MW

2.11 X 1.55 (5.4 X 3.9)

1.5 kW

 

0.005 (0.013)

RG-106/U

MI-23-5.8/8

5.85-8.2

1.9 MW

2.11 X 1.55 (5.4 X 3.9)

1.5 kW

 

0.005 (0.013)

RG-106/U 6061

MI-23-8.2/2

8.2-12.4

0.7 MW

1.46 X 1.07 (3.7 X 2.7)

0.7 kW

 

0.005 (0.013)

RG-67/U

MI-23-8.2/4

8.2-12.4

0.7 MW

1.46 X 1.07 (3.7 X 2.7)

0.7 kW

 

0.005 (0.013)

RG-67/U

MI-23-8.2/6

8.2-12.4

0.7 MW

1.46 X 1.07 (3.7 X 2.7)

0.7 kW

 

0.005 (0.013)

RG-57/U 6061

MI-23-12/1

12.4-18.0

0.4 MW

0.97 X 0.71 (2.5 X 1.8)

0.4 kW

0.050 (0.13)

 

RG-91/U

MI-23-12/2

12.4-18.0

0.4 MW

0.97 X 0.71 (2.5 X 1.8)

0.4 kW

0.050 (0.13)

 

RG-91/U

MI-23-12/4

12.4-18.0

0.4 MW

0.97 X 0.71 (2.5 X 1.8)

0.4 kW

0.050 (0.13)

 

RG-91/U Brass

MI-23-18/1

18.0-26.5

0.17 MW

0.66 X 0.48 (1.7 X 1.2)

0.14 kW

0.050 (0.13)

 

RG-53/U Brass

MI-23-26/1

26.5-40.0

0.096 MW

0.43 X 0.03 (1.1 X 0.08)

0.09 kW

0.030 (0.08)

 

RG-271 Brass

1 Ref. MIL-STD-1358B
2 Derated for typical VSWR