SAT-333-28028-S1

Rev. 1.0

Description
Model SAT-333-28028-S1 is a WR-28 orthomodetransducer (OMT) that operates between 24 and 42 GHz.
The OMT separates a circular or elliptical polarized
waveform into two linear, orthogonal waveforms orcombines two linear polarized waveforms into one
circular or elliptical polarized waveform or vice versa.
The OMT also supports either vertical or horizontal
polarized waveguide forms with more than 30 dB crosspolarization rejections. The OMT shows high port isolation while providing a low insertion loss. TheOMT is configured with a 0.280” x 0.280” square waveguide for the antenna port and two WR-28
waveguides for the horizontal and vertical ports. All ports have standard UG-599/U flanges and 4-40
threaded holes.

Features:••••

Applications:•••High Isolation
Low Insertion Loss
Full Band PerformanceHigh Crosspol Rejection

Radar and Communication Systems
Antenna Range
Circular and Linear Waveform Separation
and Combination

Electrical Specifications:Parameter
Frequency Range
Insertion Loss (A to V Port)
Insertion Loss (A to H Port)
Isolation (V to H Port)
Cross Polarization (A to V Port)
Cross Polarization (A to H Port)
Return Loss (H Port)
Return Loss (V Port)
Return Loss (A Port, Vertical)
Return Loss (A Port, Horizontal)
Specification Temperature
Operating Temperature

Minimum
24 GHzTypicalMaximum
42 GHzSAGE Millimeter, Inc.

WR-28 Orthomode Transducer, 24 to 42 GHz, Square Waveguide Port

0.5 dB
0.5 dB
40 dB
35 dB
35 dB
15 dB
15 dB
15 dB
15 dB
+25 ˚C-40 ˚C+85 ˚C

Mechanical Specifications:
Item
Antenna Port
Horizontal and Vertical Ports
Flange Type
Material and Finish
WeightSize
OutlineSpecification0.280” x 0.280” Square WaveguideWR-28 WaveguideUG-599/U Flange 4-40 Threaded HolesGold Plated Aluminum
2.3 Oz1.70” (L) x 1.25” (W) x 0.75” (H)AT-AS-280-F

www.sagemillimeter.com | 3043 Kashiwa Street, Torrance, CA 90505
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: sales@sagemillimeter.com
Copyright © 2018 by SAGE Millimeter, Inc.

Page | 1

SAT-333-28028-S1

Rev. 1.0

Typical Performance vs. Frequency
00-4

Insertion Loss (H)-8-2

Insertion Loss (V)-3

Cross Polarization (H)-12Cross Polarization (V)-16-4Isolation-20-5-24-6-28-7-32-8-36-9-40-10-4427282930

31

32

33

3435

36

37

38

3940

41

42Frequency (GHz)

Typical Return Loss vs. Frequency
0Cross Polarization and Isolation (dB)

Insertion Loss (dB)

-1

SAGE Millimeter, Inc.

WR-28 Orthomode Transducer, 24 to 42 GHz, Square Waveguide Port

Return Loss (Antenna Horizontal Port)
Return Loss (Antenna Vertical Port)-5

Return Loss (Horizontal Port)
Return Loss (Vertical Port)-10

Return Loss (dB)-15-20-25
-30
-35
-40
-45
27

28.5

30

31.53334.5

3637.53940.542Frequency (GHz)www.sagemillimeter.com | 3043 Kashiwa Street, Torrance, CA 90505
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: sales@sagemillimeter.com
Copyright © 2018 by SAGE Millimeter, Inc.

Page | 2

SAT-333-28028-S1

Rev. 1.0

Mechanical Outline: (Unless otherwise specified, all dimensions are in inches [millimeters])

SAGE Millimeter, Inc.

WR-28 Orthomode Transducer, 24 to 42 GHz, Square Waveguide PortNote:• All data presented is collected from a sample lot. Actual data may vary unit to unit, slightly.
• All testing was performed under +25˚C room temperature.
• SAGE Millimeter, Inc. reserves the right to change the information presented without notice.
Caution:•Any foreign objects in the antenna will cause performance degradation and possible device
damage.

www.sagemillimeter.com | 3043 Kashiwa Street, Torrance, CA 90505
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: sales@sagemillimeter.com
Copyright © 2018 by SAGE Millimeter, Inc.

Page | 3