SAT-FK-42042-S1
WR-42 Orthomode Transducer
SAT-FK-42042-S1 is a full band, WR-42 orthomode transducer(OMT) that operates between 18 to 26.5 GHz. The OMTseparates a circular or elliptical polarized waveform into twolinear, orthogonal waveforms or combines two linear polarized
waveforms into one circular or elliptical polarized waveform. TheOMT shows high port isolation while maintaining a low insertion
loss. The OMT is configured with a 0.420” x 0.420” squarewaveguide for the antenna port and two WR-42 waveguides forthe horizontal and vertical ports. All ports have UG-595/U flanges
with 4-40 threaded holes.

Electrical Specifications:Parameter
Frequency Range

Minimum
18.0 GHz

TypicalInsertion Loss (A to V Port)

0.5 dB

Insertion Loss (A to H Port)

0.5 dB

Isolation (V to H Port)

40 dB

Return Loss ( H Port)

15 dB

Return Loss (V Port)

15 dB

Return Loss (A Port, Vertical)

15 dB

Return Loss ( A Port, Horizontal)

15 dB

Specification Temperature+25 °COperating Temperature-40 °C

Maximum
26.5 GHz•••

High Port Isolation
Low Insertion Loss
Full Band PerformanceAPPLICATIONS+85 °CSpecification
0.420” x 0.420” Square WaveguideWR-42 WaveguideUG-595/U Threaded Flange (on all ports)
AluminumGold Plated
5.0 Oz2.00” (L) x 1.65” (W) x 1.00” (H)AT-KS-420-F

www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2023 by Eravant

EAR99

FEATURES

Mechanical Specifications:
Item
Antenna Port
Horizontal and Vertical Ports
Flange Type
Material
FinishWeight
Dimensions
OutlineECCN••••

Radar Systems
Communication Systems
Antenna Ranges
Waveform Polarization Separation
and CombinationSUPPLEMENTAL DETAILSAdvanced Rev 1.4

1/3

SAT-FK-42042-S1
Typical Insertion Loss and Isolation vs. Frequency
00-1-5-2-10-15

Antenna to Vertical I.L.

-4-20

Antenna to Horizontal I.L.

-5-25

Isolation

-6-30

-7-35

-8-40

-9-45

-10

18

19

20

21

22

23

24

25

Isolation (dB)

Insertion Loss (dB)

-3-50

26

Frequency (GHz)

Typical Return Loss vs Frequency
0RL-V (V-Port)RL-AH (Antenna Port to H-Port)-10

RL-AV (Antenna Port to V-Port)RL-H (H-Port)

Return Loss (dB)-20-30-40-50-60-70-80

1818.5

1919.52020.52121.5www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2023 by Eravant

2222.5Frequency (GHz)2/32323.52424.52525.52626.5

SAT-FK-42042-S1
Mechanical Outline:
Unless otherwise specified, all dimensions are in inches [millimeters])
4 x 4-40 UNC - 2B

0.16 4.1
0.79 19.9

2 x 0.67 17.0

CL

CL

CL

CL

2 x 0.64 16.3

WR-42 WAVEGUIDEW/ UG-595/U COMPATIBLE FLANGE(V-PORT)

0.420" SQUARE WAVEGUIDEW/ UG-595/U COMPATIBLE FLANGE(ANTENNA PORT)

4 x 0.76 19.3

1.00 25.4

2 x 0.64 16.3

8 x 4-40 UNC - 2B
0.16 4.1(4 x ON OPPOSITE SIDE)

2 x 0.67 17.0

CLWR-42 WAVEGUIDEW/ UG-595/U COMPATIBLE FLANGE(H-PORT)

2.00 50.8

CL

4 x 0.64 16.3
CL

8 x 4-40 UNC - 2B
0.17 4.3(4 x ON OPPOSITE SIDE)

1.65 41.9

NOTE:
•
•
•

On condition that test data is provided it is collected from a sample lot. Actual data may vary slightly
from unit to unit. All testing is performed under +25 °C room temperature.
On condition that simulated test data is provided, actual measured data may slightly vary.
Eravant reserves the right to change the information presented without notice.

CAUTION:••••

If a waveguide is present, any foreign objects in the waveguide will cause performance degradationand may damage or destroy the unit.
Any foreign objects in the antenna will cause performance degradation and possible device
damage.
For 1 mm connectors proper torque should be applied: 4.0 ± 0.15 inch-pounds (0.45 ± 0.02 Nm).
Torque wrench model SCH-06004-S1 is highly recommended.
For 1.35 mm, 1.85 mm, 2.4 mm, 2.92 mm, and SMA connectors proper torque should beapplied: 8.0 ± 0.15 inch-pounds (0.90 ± 0.02 Nm). Torque wrench model SCH-08008-S1 is highly
recommended.

www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2023 by Eravant

3/3