SNW-1832130418-51-I1

Rev. 1.0

Description:
Model SNW-1832130418-51-I1 is a WR-51 waveguide junction
isolator that covers the frequency range of 18 to 21 GHz. The
waveguide junction isolator is designed and manufactured toprovide low insertion loss and moderate isolation for system
integration. Compared with a Faraday isolator, it offers lower
insertion loss and a much shorter insertion length. The WR-51
isolator offers 18 dB minimum isolation and 0.4 dB maximum
insertion loss with good flatness. The input and output ports are
WR-51 waveguides with UG-419/U-M Square flanges. The isolator
implements a U shaped magnet shielding steel cover to protect itfrom magnetic field interface.

Features:•••Applications:

Low insertion loss
Moderate isolation
Compact Configuration● Port Isolation● Module Integration

Electrical Specifications:Parameter
Frequency**Insertion Loss
Isolation
Return Loss
Forward Power Handling
Reverse Power HandlingSpecification Temperature
Operating Temperature

Minimum
18 GHzTypicalMaximum
21 GHz0.4 dB

SAGE Millimeter, Inc.

WR-51 Waveguide Junction Isolator, 18 to 21 GHz Band

18 dB
15 dB
5 W (CW)
2 W (CW)+25 ˚C-40 °C+85 °C**Various frequency ranges are offered under different model numbers.

Mechanical Specifications:
ItemInput PortOutput Port
Case Material
Finishing
WeightInsertion Length
OutlineSpecification
WR-51 Waveguide with UG-419/U-M Flange
WR-51 Waveguide with UG-419/U-M Flange
Aluminum
Chem Film
1.6 Oz0.59”
NW-I5-J1

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SNW-1832130418-51-I1

Rev. 1.0

Typical Performance vs. Frequency
00-1-5
Insertion Loss

Output Return Loss

-3

Insertion Loss (dB)

-10

Input Return Loss

-15

Isolation-4-20-5-25-6-30

-7-35

-8-40

-9-45

-10

Return Loss and Isolation (dB)-2

SAGE Millimeter, Inc.

WR-51 Waveguide Junction Isolator, 18 to 21 GHz Band-50
1818.2

18.4

18.6

18.8

19

19.2

19.4

19.6

19.8

20

20.2

20.4

20.6

20.8

21

Frequency (GHz)

Mechanical Outline: (Unless otherwise specified, all dimensions are in inches)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SNW-1832130418-51-I1

Rev. 1.0

Note:
•••
•

All data presented is collected from a sample lot. Actual data may vary unit to unit slightly.
All testing was performed under +25 ˚C case temperature.
SAGE Millimeter, Inc. reserves the right to change the information presented without notice.
Other mechanical configurations are available under different model numbers.

Caution:•••Exceeding absolute maximum ratings of the device will damage the device.
The device is magnetically sensitive. Keep a safe distance from magnetic fields.
Any foreign objects in the waveguide will degrade performance and/or damage the device.

SAGE Millimeter, Inc.

WR-51 Waveguide Junction Isolator, 18 to 21 GHz Bandwww.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.

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