SAS-403-21922-F1

Rev. 1.1

Description:
Model SAS-403-21922-F1 is a Q band, linear
to circular polarizer that operates at 40 GHz
with a ±1.0 GHz bandwidth. The polarizer
offers a typical insertion loss of 0.5 dB, a
typical axial ratio of 1.1, and a typical returnloss of 20 dB. The polarizer is fixed and canbe 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-22219SB) and WR-22 conical horn antenna (SAC-2309-219-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
Frequency*39 GHz
Insertion Loss
Axial Ratio
Return Loss
Specification Temperature
Operating Temperature-40 °C*Note: Actual frequency can be extended to cover 39 to 43 GHz.

TypicalSAGE Millimeter, Inc.

Linear to Circular Polarizer, Q Band, 39 to 41 GHz, Ø 0.219”

Maximum41 GHz0.5 dB
1.1
20 dB
+25 °C+85 °C

Mechanical Specifications:
ItemWaveguide
Body Material
FinishWeightInsertion LengthOutline

Specification
0.219” Dia Circular Waveguide with UG-383/U-M Flange
BrassGold Plated
2.5 Oz1.5”
AS-FQB-219

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 | 1

SAS-403-21922-F1

Rev. 1.1

Measured Insertion Loss vs. Frequency
0-1-2

Insertion Loss (dB)

-3-4-5-6-7-8-9-10
39

39.2

39.4

39.6

39.8

40

40.2

40.4

40.6

40.8

Frequency (GHz)

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

41SAGE Millimeter, Inc.

Linear to Circular Polarizer, Q Band, 39 to 41 GHz, Ø 0.219”

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:• Any foreign objects in the antenna will cause performance degradation and possible device
damage.
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-403-21922-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, Q Band, 39 to 41 GHz, Ø 0.219”

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