STA-60-28-D1

Final Rev 1.3

Description:
Model STA-60-28-D1 is a direct reading, rotary vane attenuator
for use in millimeter wave systems across the standard Ka-band
frequency range of 26.5 to 40 GHz. The attenuator has a large
scale dial which indicates the attenuation value directly. The
attenuator is an ideal piece of equipment in waveguide systems
where a broad direct reading of attenuation is required. The
attenuator exhibits 0.5 dB maximum insertion loss and up tomaximum 60 dB attenuation. The accuracy of the attenuator is
0.1 dB or 3% of the reading, whichever is larger, up to 40 dB,
5% up to 50 dB, and “for reference only” above 50 dB.

Features:•••

Applications:•••

Full Band CoverageHigh Attenuation Accuracy
Large Scaled Dial

Test Lab
Instrumentations
Manual Test Set

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

Minimum
26.5 GHz

TypicalMaximum
40.0 GHz
0.5 dB

SAGE Millimeter, Inc.

Ka-Band Direct Reading Attenuator

22 dB0 dB
60 dB
0.1 dB or 3% of reading, whichever is larger, up to 40 dB
500 mW+25 ˚C+25 ˚C*This product is intended to be used in a controlled lab environment.
To ensure best possible accuracy and prevent unintended behavior, please operate the unit as close to +25 °C room
temperature as possible.

Mechanical Specifications:
ItemRF Input
RF Output
Reading
Scale Increments
Insertion Length
FinishWeight
OutlineSpecification
WR-28 Waveguide with UG-599/U Flange
WR-28 Waveguide with UG-599/U Flange
Large Scale Dial
0.01 dB (0 to 0.1 dB); 0.05 dB (0.1 to 1.0 dB); 0.1 dB (1.0 to 10 dB)
0.02 dB (10 to 20 dB); 0.05 dB (20 to 30 dB); 1.0 dB (30 to 50 dB)
6.87”
Black Anodized
2.6 lbTA-DA

www.eravant.com | 501 Amapola Ave, Torrance, CA 90501
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: support@eravant.com
Copyright © 2024 by Eravant

Page | 1

STA-60-28-D1Final Rev 1.3

Typical Attenuation vs. Frequency
100I.L.

Attenuation (dB)

-1010 dB-2020 dB
30 dB-3040 dB-40

50 dB-50

60 dB-60-70
26.5

2829.53132.53435.53738.5Frequency (GHz)

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

40

SAGE Millimeter, Inc.

Ka-Band Direct Reading Attenuator

www.eravant.com | 501 Amapola Ave, Torrance, CA 90501
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: support@eravant.com
Copyright © 2024 by Eravant

Page | 2

STA-60-28-D1Final Rev 1.3

Note:• Calibration accuracy is 0.1 dB or 3% of the reading, whichever is greater, for attenuation ranges
up to 40 dB, 5% up to 50 dB, and “for reference only” above 50 dB.
• All calibration and testing are performed at +25 °C room temperature.
• This product is intended to be used in a controlled lab environment. To ensure best possible
accuracy and prevent unintended behavior, please operate the unit as close to +25 °C room
temperature as possible.
• The attenuation flatness is ±2% or ±0.5 dB of the indicated value, whichever is greater, for thefrequency band.
• The phase shift value does change while varying the attenuation.
• Eravant reserves the right to change the information presented without notice.
Caution:• Exceeding absolute maximum ratings shown will damage the device.
• Any foreign objects in the waveguide will cause performance degradation and may damage thedevice.

SAGE Millimeter, Inc.

Ka-Band Direct Reading Attenuator

www.eravant.com | 501 Amapola Ave, Torrance, CA 90501
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: support@eravant.com
Copyright © 2024 by Eravant

Page | 3