SAS-293-31528-F1

Linear to Circular Polarizer, Ka Band, 26 to 33 GHz
SAS-293-31528-F1 is a Ka-band linear to circular polarizer that operates
at 29.5 GHz with a ±3.5 GHz bandwidth. The polarizer offers a typicalinsertion loss of 0.5 dB, a nominal axial ratio of 1.1, 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 WR-28 rectangularto Ø0.315” circular waveguide transition (SWT-28315-SB) and a Ø0.315”
circular waveguide conical horn antenna (SAC-2309-315-S2) or scalarhorn antenna (SAF-2633331725-315-S1) for various systemapplications.

Electrical Specifications:Parameter

Minimum

TypicalMaximum

Frequency Range

26 GHz29.5 GHz

33 GHz

ECCN
EAR99

Bandwidth

0.5 GHz

Axial Ratio

1.1

FEATURES

Return Loss

20 dB

Specification Temperature

+25°C

••
•
•

Operating Temperature

-40°C

+85°C

Circular Waveguide Interface
Low Insertion Loss
Good Axial Ratio
LHCP or RHCPAPPLICATIONS

Mechanical Specifications:
Item

SpecificationWaveguideØ0.315” Circular Waveguide with UG-599/U-M Flange

Length2.0”

MaterialAluminumFinish

Gold Plated

Weight0.6 Oz

OutlineAS-FAB-315••••

Antenna Ranges
Waveguide Polarization Selection
Radar Systems
Communication Systems

SUPPLEMENTAL DETAILS

www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2023 by Eravant

Final Rev 1.3
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SAS-293-31528-F1

Typical Insertion Loss and Return Loss vs Frequency00-5-5Insertion Loss-10Return Loss-15-15-20-20-25-25-30-30-35-35-40-40-45-45-50

Return Loss (dB)

Insertion Loss (dB)

-10-50262728

2930

3132

33

Frequency (GHz)

Axial Ratio

Typical Axial Ratio vs Frequency
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
026

26.5

27

27.5

28

28.5

29

29.5

30

30.5

31

31.5

32

32.5

33

Frequency (GHz)www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2023 by Eravant

Final Rev 1.3
2/4

SAS-293-31528-F1

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

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.
On condition that simulated test data is provided, actual measured data may slightly vary.
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.

www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2023 by Eravant

Final Rev 1.3
3/4

SAS-293-31528-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 © 2023 by Eravant

Final Rev 1.3
4/4