SAS-773-12512-F1

Linear to Circular Polarizer, E Band, 77 GHz
SAS-773-12512-F1 is an E band, linear to circular polarizer that operates
at 77 GHz with a ±6.0 GHz bandwidth. The polarizer offers a maximum
insertion loss of 1.0 dB, a maximum axial ratio of 1.2, and a typical returnloss of 20 dB. The polarizer is fixed and can be used for either righthanded or left-handed polarization based on the direction of the input
signal. The polarizer is often combined with Eravant’s rectangular tocircular waveguide transition (SWT-12125-SB) and WR-12 conical hornantenna (SAC-2309-125-S2) for various system applications.

Electrical Specifications:Parameter

Minimum

TypicalMaximum

Center Frequency

77 GHzBandwidth±6.0 GHz

Insertion Loss

0.5 dB

1.0 dB

Axial Ratio

1.1

1.2

Return Loss

20 dB

15 dB

ECCN
EAR99

FEATURES•

Circular Waveguide Interface• Low Insertion Loss
• Good Axial Ratio
APPLICATIONS••

Antenna Ranges
Waveguide polarization
selection• Radar Systems• Communication Systems

Mechanical Specifications:
Item

Specification

Waveguide0.125” Dia Circular Waveguide with UG-387/U-M AntiCocking FlangeLength1.0”

Case Material

Aluminum

FinishGold Plated

Weight

0.8 OzOutline

AS-FEB-125-A

www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2024 by Eravant

SUPPLEMENTAL DETAILS

Rev 1.3
1/4

SAS-773-12512-F1

Typical Insertion Loss vs. Frequency (Back to Back)
0-1

Insertion Loss (dB)

-2-3-4-5-6-7-8-9-10
76

7778

79

80

81

Frequency (GHz)

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

www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2024 by Eravant

Rev 1.3
2/4

SAS-773-12512-F1

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 and output ports and the orientationin which the polarizer is to be attached to the rest of the components to obtain a LHCP signal at the output port.
The polarizer can be configured to obtain a Right-Handed Circular Polarized (RHCP) signal at the output port by
reversing the input and output ports as shown in the second diagram.

www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2024 by Eravant

Rev 1.3
3/4

SAS-773-12512-F1

NOTE:
••
•

On condition that test data is provided it is collected from a sample lot. Actual data may vary slightly from unit to unit. All
testing is performed under +25 °C room temperature.
The Polarizer is offered as LHCP. However, it can be used as RHCP by reversing the input and output ports.
Eravant reserves the right to change the information presented without notice.

CAUTION:•••

If a waveguide is present, any foreign objects in the waveguide will cause performance degradation and may damage ordestroy the unit.
For 1 mm connectors proper torque should be applied: 4.0 ± 0.15 inch-pounds (0.45 ± 0.02 Nm). Torque wrench model
SCH-06004-S1 is highly recommended.
For 1.35 mm, 1.85 mm, 2.4 mm, 2.92 mm, and SMA connectors proper torque should be applied: 8.0 ± 0.15 inch-pounds(0.90 ± 0.02 Nm). Torque wrench model SCH-08008-S1 is highly recommended.

www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2024 by Eravant

Rev 1.3
4/4