SWD-2040H-28-BB

Rev. 1.1

Description:
Model SWD-2040H-28-BB is a Ka band,
four-port waveguide bi-directional
coupler that delivers a 20 dB nominal
coupling level and 40 dB typical directivity
across the full waveguide band from 26.5
to 40 GHz. The four-port coupler uses a
traditional multi-hole and split block
design to achieve a flat coupling level, high directivity, and low insertion loss. The interfaces of thecoupler are WR-28 waveguides with UG-599/U flanges. Other coupling levels including custom couplinglevels and asymmetrical forward/reverse coupling levels are available under different model numbers.

Features:•••

Applications:•••

Test Labs
Instrumentation
Sub-assemblies

Minimum
26.5 GHz

Typical

Full Band Operation
Low Insertion Loss
High Directivity

Electrical Specifications:Parameter
Frequency
Insertion Loss*
Coupling*
Directivity*
Main Line Return Loss
Coupling Line Return Loss
Specification Temperature
Operating Temperature

Maximum
40 GHzSAGE Millimeter, Inc.

Ka-Band Waveguide Bi-Directional Coupler, 20 dB

0.5 dB
20 dB
40 dB
25 dB
25 dB
+25 ˚C-40 ˚C+85 ˚C* The definition of the insertion loss, coupling and directivity is shown below. The required termination on thewaveguide port is 30 dB or better for accurate measurement.
Insertion Loss = -10 log10 [(P2+P3)/P1] when P4 is terminated.
Coupling Value = -10 log10 [P3/P1] when P4 is terminated.
or -10 log10 [P4/P2] when P3 is terminated.
Directivity = -10 log10 [P3/P2] when P4 is terminated.
Directivity = -10 log10 [P4/P1] when P3 is terminated.

P1

P2
P4

P3

P1

P2
P4

P3

www.sagemillimeter.com | 3043 Kashiwa Street, Torrance, CA 90505
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: sales@sagemillimeter.com
Copyright © 2015 by SAGE Millimeter, Inc.

Page | 1

SWD-2040H-28-BB

Rev. 1.1

Mechanical Specifications:
Item
Waveguide Ports
Material
FinishWeight
Size
OutlineSpecification
WR-28 Waveguide with UG-599/U Compatible Flange
BrassGold Plated
1.35 lbs.
6.50” (L) X 1.20” (W) x 0.90” (H)WD-BB-A

Typical Insertion and Return Loss vs Frequency
00Insertion Loss-10Return Loss-20-20-30-30-40-40-50

Return Loss (dB)

Insertion Loss (dB)

-10SAGE Millimeter, Inc.

Ka-Band Waveguide Bi-Directional Coupler, 20 dB

-50
26.5

2829.53132.53435.53738.540

Frequency (GHz)

Typical Coupling and Directivity vs Frequency
00
Coupling-10-10-20-20-30-30-40-40-50

Directivity (dB)

Coupling (dB)Directivity

-50
26.5

2829.53132.53435.53738.540

Frequency (GHz)www.sagemillimeter.com | 3043 Kashiwa Street, Torrance, CA 90505
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: sales@sagemillimeter.com
Copyright © 2015 by SAGE Millimeter, Inc.

Page | 2SWD-2040H-28-BB

Rev. 1.1

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

Note:
••
•
•

SAGE Millimeter, Inc.

Ka-Band Waveguide Bi-Directional Coupler, 20 dB

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.
The insertion loss shown includes the loss due to coupling.
SAGE Millimeter, Inc. reserves the right to change the information presented without notice.

Caution:•Any foreign objects in the waveguide 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 © 2015 by SAGE Millimeter, Inc.

Page | 3