STA-30-28-M1

Rev 1.1

Description:
Model STA-30-28-M1 is a Ka-band level setting
attenuator that covers the frequency range of common
5G bands from 24 to 44 GHz. The attenuator features aprecision micrometer dial with a knurled head locking
screw, which allows for stable, repeatable settings thatcan be locked at any attenuation value. The level setting
attenuator is an ideal piece of equipment in waveguidesystems where broadband attenuation is required. The
attenuator exhibits 0.4 dB typical insertion loss and up
to 30 dB nominal attenuation value across the entire operating bandwidth. The other attenuator types,
such as direct reading, programmable and fixed tuned attenuators are also available under different
model numbers.

Features:••••

Applications:

Broadband Coverage from 24 to 44 GHz
Head Locking Screw
Precision Machined Housing
Convenient Level Setting••••

5G mmWave Systems
Test Lab
Instrumentations
Manual Test Set

SAGE Millimeter, Inc.

Ka-Band Level Setting Attenuator, Head Locking Screw, 24 to 44 GHz

Electrical Specifications:Parameter
Frequency
Insertion Loss
Attenuation
Return Loss
Power HandlingSpecification Temperature
Operating Temperature

Minimum
24 GHzTypical
0.4 dB
30 dB
20 dB
1 W (CW)+25 ˚C-40 ˚C

Maximum
44 GHz

1.2 W (CW)+85 ˚Cwww.sagemillimeter.com | 3043 Kashiwa Street, Torrance, CA 90505
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: sales@sagemillimeter.com
Copyright © 2021 by SAGE Millimeter, Inc.

Page | 1

STA-30-28-M1

Rev 1.1

Mechanical Specifications:
Item

Specification
WR-28 Waveguide with UG-599/U Flange
Head Locking Screw Type Micrometer
0.5mm
0.01mm3.00”
BrassGold Plated
6.0 oz.
TA-MA

RF Ports
Setting Type
Micrometer Pitch
Micrometer Resolution
Insertion Length
MaterialFinish
WeightOutline

Typical Measured Attenuation vs Frequency
0-5Attenuation (dB)

-10

SAGE Millimeter, Inc.

Ka-Band Level Setting Attenuator, Head Locking Screw, 24 to 44 GHz

-15
-20
-25
-30
-35
-40
24

26

28

30

32

34

36

38

40

42

44

Frequency (GHz)
Insertion Loss

3 dB

6 dB

10 dB

20 dB

30 dB

www.sagemillimeter.com | 3043 Kashiwa Street, Torrance, CA 90505
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: sales@sagemillimeter.comCopyright © 2021 by SAGE Millimeter, Inc.

Page | 2

STA-30-28-M1

Rev 1.1

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

SAGE Millimeter, Inc.

Ka-Band Level Setting Attenuator, Head Locking Screw, 24 to 44 GHz

Note:••••All data presented is collected from a sample lot. Actual data may vary unit to unit.
All testing was performed under +25 °C case temperature.
For more information on the technical details of level-setting attenuators and other types ofwaveguide attenuators, a short instructional blog is available here (FIXED, LEVEL SETTING,DIRECT READING, AND PROGRAMMABLE ATTENUATORS)SAGE Millimeter, Inc. reserves the right to change the information presented without notice.

Caution:•••RF power should never exceed 1.2 W.
Forcing the micrometer down after encountering resistance may damage the dielectric sheet
inside. This will cause permanent performance degradation and decrease the long-term stability
and repeatability of the device.
Attempting to adjust the micrometer setting while the head locking screw is engaged may damage
the micrometer and decrease the long-term stability and repeatability of the device.

www.sagemillimeter.com | 3043 Kashiwa Street, Torrance, CA 90505
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: sales@sagemillimeter.com
Copyright © 2021 by SAGE Millimeter, Inc.

Page | 3

STA-30-28-M1

Rev 1.1•Any foreign objects in the waveguide will cause performance degradation and may damage thedevice.

SAGE Millimeter, Inc.

Ka-Band Level Setting Attenuator, Head Locking Screw, 24 to 44 GHz

www.sagemillimeter.com | 3043 Kashiwa Street, Torrance, CA 90505
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: sales@sagemillimeter.com
Copyright © 2021 by SAGE Millimeter, Inc.

Page | 4