Antenna Products
ESM/EW
AS-48611
Wideband Circularly Polarized Spiral Helix Antenna
The AS-48611 Spiral Helix antenna provides extremely broadband frequency
capabilities in a small physical size. This capability is achieved by combining
the radiating characteristics of both the planar spiral and helix into a single
assembly, thereby more effectively utilizing the volume.
The axial ratio is extremely low over the majority of the radiation pattern.
This performance characteristic, as well as a good radiating efficiency, makes
the AS-48611 antenna very suitable as a broadband reflector feed or as a
sector element in full azimuthal DF arrays. The AS-48611 is also useful down
to 0.40 GHz, with reduced gain.
The AS-48611 is designed to meet the rigorous environments imposed by
MIL-E-5400 and MIL-E-16400. It is a highly reliable maintenance-free antenna
adaptable to a variety of platforms.
FEATURES:
• Broad Frequency Coverage
• Small size
• Lightweight
• Right-hand or left-handcircular polarization available
SPECIFICATIONS FOR: AS-48611 WIDEBAND CIRCULARLY POLARIZED SPIRAL HELIX ANTENNA
ELECTRICAL
Frequency Range
0.5 to 18 GHz
VSWR
2.5:1 typ 3.0:1 max
Gain (min)
See Graph
Polarization
-01
RHCP
-03
LHCP
Beamwidth 3 dB
See Graph
Axial Ratio
2dB Typical at Boresight
Power Handling
Receive Only
MECHANICAL
Connector
SMA Right-Angle Jack (Female)
Weight
0.35 lbs. (0.16 Kg.)
All data contained herein is subject to change without notice.
For additional information E-mail: antenna.info@harris.com
5207-045 (LB85)
Approved for Public Release 10-2010, EAID EXPID9473
AS-48611
Wideband Circularly Polarized Spiral Helix Antenna
INCHES (CENTIMETERS)
VSWR VS. FREQUENCY
6.0
7.4
8.5
14.0
3.00:1
2.50:1
2.00:1
1.50:1
20.5
1.20:1
0.5
VSWR
RETURN LOSS dB
0
Consult with factory for
mounting specifications.
10.0
FREQUENCY (GHz)
GAIN VS. FREQUENCY
GAIN
4
2
0
2
-4
-6
-8
-10
-12
-14
0
2
4
6
8
10
12
14
16
18
16
18
FREQUENCY (GHz)
BEAMWIDTH VS. FREQUENCY
BEAMWIDTH (dBi)
130
110
90
70
50
0
2
4
6
8
10
12
14
FREQUENCY (GHz)
FLORIDA
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NEW YORK
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VIRGINIA
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BRAZIL
Approved for Public Release 10-2010, EAID EXPID9473
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