SAQ-103039-938-S1
X-Band Spot-Focusing Lens Antenna, 10 GHz, 3.94”
Focal Length
SAQ-103039-938-S1 is an X-Band spot-focusing lensantenna that delivers a nominal 3 dB spot size of 1.21” at
the focal length of 3.94”, and a typical return loss of 15 dB
across the frequency range of 9.5 to 10.5 GHz. The antenna
employs a low loss lens to offer excellent aperture efficiency
at 10 GHz. The spot-focusing lens antenna is equipped witha 0.938” diameter circular waveguide with UG-39/U flange
as its antenna port. It supports linear and circular polarized
waveforms.

Electrical Specifications:ParameterFrequency
Focal Length
Spot Size
Power Captured
Spot Size
10 dB Below PeakPower Captured
Spot Size
3 dB Below PeakPower Captured
Polarization
Return Loss
Specification Temperature
Operating Temperature
Peak to First Null

Minimum
9.5 GHz

TypicalMaximum
10.0 GHz
10.5 GHz
3.94”
3.04”
83.8%
2.09”
78.9%
1.21”
47.4%
Linear and Circular
15 dB+25 °C-45 °C+85 °C

Mechanical Specifications:
ItemAntenna Port

Specification
Ø 0.938” Circular Waveguide with UG-39/U Flange

Horn/Lens Material

Aluminum/HDPE

FinishChem Film

Weight14.9 Oz

Lens Diameter

4.00”

Dimensions

5.00” (L) x 4.58” (Ø)

OutlineAQ-CX-4.0-C938

www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2022 by Eravant

ECCN
EAR99

FEATURES••

Rugged Mechanical Configurations
High Efficiency and Low LossAPPLICATIONS••

Scientific Instruments
Material Research Instruments

SUPPLEMENTAL DETAILS

Final Rev 1.4

1/4

SAQ-103039-938-S1
Mechanical Outline:
Unless otherwise specified, all dimensions are in inches [millimeters])

4.58 116.3
2.35 59.7

0.44 11.2

8 x 6-32 UNC 0.15[ 3.8]
MOUNTING HOLES

2.15 54.5
45°

4.11 104.4
5.00 127.0

4x0.17 4.4 THRU

0.938[ 23.83] CIRCULAR WAVEGUIDEW/ UG-39/U-M FLANGE

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 degradationand may damage or destroy the unit.
Any foreign objects in the antenna will cause performance degradation and possible device
damage.
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 beapplied: 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 © 2022 by Eravant

2/4

SAQ-103039-938-S1
Theoretical Spot Size vs Frequency
2.5
3 dB Spot Size
10 dB Spot Size

Spot Size (inch)

2

1.5

1

0.5

0

9.5

9.6

9.7

9.8

9.9

10

10.1

10.2

10.3

10.4

10.5

10.1

10.2

10.3

10.4

10.5

Frequency (GHz)

Typical Measured Return Loss vs Frequency
0-5-10Return Loss (dB)-15-20-25-30-35-40-45-50

9.5

9.6

9.7

9.8

9.910Frequency (GHz)www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2022 by Eravant

3/4

SAQ-103039-938-S1
Focal Length Diagram:
Focal Length is defined in the diagram below with a pair of spot-focusing lens antennas
SPOT FOCUSING LENS ANTENNA FOCAL LENGTH DIAGRAM
SPOT FOCUSINGLENS ANTENNASEPARATION DISTANCE = 2 x f
FOCAL POINTfff = FOCAL LENGTH

www.eravant.com | 424-757-0168 | support@eravant.com
Copyright © 2022 by Eravant

4/4

SPOT FOCUSINGLENS ANTENNA