SAS-443-18819-F1

Rev 1.1

Description:
Model SAS-443-18819-F1 is an U band, linear to circularpolarizer that operates at 44 GHz with a ±3.3 GHzbandwidth. The polarizer offers a typical insertion loss of0.5 dB, a typical axial ratio of 1.1, and a typical return lossof 20 dB. The polarizer is fixed and can be used for either
right-handed or left-handed polarization based on the direction of the input signal. The polarizer is often
combined with Eravant’s rectangular to circular waveguide transition (SWT-19188-SB) and WR-19
conical horn antenna (SAC-2309-188-S2) for various system applications.

Features:••••Applications:

Circular Waveguide Interface
Low Insertion Loss
Good Axial Ratio
LHCP or RHCP••••

Antenna Ranges
Waveguide Polarization Selection
Radar Systems
Communication Systems

Electrical Specifications:Parameter
Minimum
TypicalMaximum
Frequency Range*
44 GHzBandwidth±3.3 GHz
Insertion Loss
0.5 dB
Axial Ratio
1.1
Return Loss
20 dB
Specification Temperature+25 °COperating Temperature-40 °C+85 °C*Note: Actual frequency can be extended to cover 40 to 55 GHz with slightly axial ratio performancedegradation.

SAGE Millimeter, Inc.

Linear to Circular Polarizer, U Band, 44 GHz, Ø 0.188”

Mechanical Specifications:
ItemWaveguide
Body Material
FinishWeight
Insertion LengthOutline

Specification
0.188” Dia Circular Waveguide with UG-383/U-M Anti-Cocking Flange
BrassGold Plated
1.4 Oz1.5”
AS-FUB-188-A

www.eravant.com | 501 Amapola Ave, Torrance, CA 90501
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: support@eravant.com
Copyright © 2021 by Eravant

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SAS-443-18819-F1

Rev 1.1

Measured Insertion Loss vs. Frequency
0-0.5
-1

Insertion Loss (dB)

-1.5
-2-2.5-3-3.5-4-4.5
-5
40.7

41.8

42.9

44
Frequency (GHz)

45.1

46.2

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

47.3

SAGE Millimeter, Inc.

Linear to Circular Polarizer, U Band, 44 GHz, Ø 0.188”

Note:• All data presented is collected from a sample lot. Actual data may vary unit to unit, slightly.
• The Polarizer is offered as LHCP. However, it can be used as RHCP by reversing the input andoutput ports.
• Eravant reserves the right to change the information presented without notice.
Caution:• Foreign objects in the waveguide will affect the polarizer performance and may damage thepolarizer.
www.eravant.com | 501 Amapola Ave, Torrance, CA 90501
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: support@eravant.com
Copyright © 2021 by Eravant

Page | 2

SAS-443-18819-F1

Rev 1.1

LHCP and RHCP Polarization Configuration Notes and Diagram:•••

The polarizer’s product label indicates the direction of Left-Handed Circular Polarization (LHCP).
An example configuration diagram is provided below. The diagram indicates the input andoutput ports and the orientation in which the polarizer is to be attached to the rest of thecomponents to obtain a LHCP signal at the output port.
The polarizer can be configured to obtain a Right-Handed Circular Polarized (RHCP) signal at theoutput port by reversing the input and output ports as shown in the second diagram.

SAGE Millimeter, Inc.

Linear to Circular Polarizer, U Band, 44 GHz, Ø 0.188”

www.eravant.com | 501 Amapola Ave, Torrance, CA 90501
Phone: 424-757-0168 | Fax: 424-757-0188 | Email: support@eravant.com
Copyright © 2021 by Eravant

Page | 3