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ASC Signal Ka-band Antenna Products
Prepared by ASC Product & Support Group
April 18th, 2013
Ka-band Earth Station Excellence A leader in Ka-band Technology • >150 fixed Ka-band terminals deployed
worldwide – iPStar – Wildblue Network – HNS Spaceway – DirecTV Diverse Sites – Various ARSTRAT certifications
• An additional 107 tactical 3.9m carbon fiber terminals delivered 2012
• Fixed antennas - 3.5m, 4.9m, 5.6m, 8.1m & 9.4m
• Transportable antennas - 2.4m, 3.9m and 4.6m
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ASC Signal Ka-band Products
3.5m Fixed Earth Station
• Used by Hughes for Spaceway
Gateway Terminal
• Type Approved by Hughes
(no field alignment required)
• Optional SRT and/or mount motion
satellite tracking
• Intelligent Heater Control System
• >50 deployed
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ASC Signal Ka-band Products
4.9m Fixed Earth Station
• Extremely versatile broadband antenna product (C, X, Ku, K, Ka)
• INTELSAT type-approved at C- and Ku- Bands
• Factory pre-aligned and certified • Low PIM X-Band Options • Simultaneous X/Ka Options • SRT and/or mount motion drives • Commercial and Government Ka-
band in single feed • Multiple current ARSTRAT
certification paths
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ASC Signal Ka-band Products 5.6m Fixed Earth Station
• Specifically designed for EHF operation
• Eight delivered and installed • Primary use as Wildblue
INTERNET gateway terminals • Each antenna configured with
redundant electronics • SRT and/or mount motion drives • Also available in Ku- and K- Band
models
ASC Signal Ka-band Products
8.1m and 9.4m Fixed ESA • >55 delivered, installed, and
commissioned • iPSTAR • WildBlue • DirectTV • WGS Terminals
• Fully ITU and ARSTRAT Compliant • Commercial + Govn’t Ka-band in
Single Feed • Large Equipment Hub Enclosure • Redundant Tracking Options • Thermal Compensation • Simultaneous X/Ka Band
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Excerpt From IBC Seminar
Engineering Ka-band: What You Need to Know
ASC Signal Ka-band Products Addressing the Key Earth Station Challenges
• Extreme Reflector/Feed Precision Required
• Hub Integrated RF Electronics Mandated
• Stiff Mechanical Constructions for Wind/Tracking
• Precision Drive Systems, High Accuracy LM tracking
• Optimized Reflector De-Ice Systems
• Solar Heating Mitigation
• Tracking Method Considerations
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ASC Signal Ka-band Products
8.1m and 9.4m Fixed ESA
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Large Hub Enclosure for Integration
ASC Signal Ka-band Products
LMA, motorized
LMA, manual
Full Motion, continuous
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8.1m and 9.4m Mount Choices
ASC Signal Ka-band Products
Key Pointing/Tracking Elements Full continuous motion mount
• Dual drive both axes • Extremely rigid construction • 10 deg inclined orbit track (X-band) • Redundant tracking scheme (Ka-Band) • Large maintenance platform
Next generation SRT Design
• End mill quality table construction • Stepper Motor Actuators • Absolute position feedback • 3rd Axis for thermal compensation
NGC antenna controller
• Mount motion and SRT in single unit • System monitor and control
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ASC Signal Ka-band Products
Key Features Optimized for tracking EHF spot
beam satellites
Much reduced mechanical wear and increased reliability
Self aligning linear bearings driven with DC stepper motors
Absolute position feedback
Virtually eliminates • Backlash • Deadband • Feedback repeatability
3rd Axis for Thermal Compensation
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ASC Signal Ka-band Products Pointing/Tracking Considerations, Thermal Beam Steering
8.1M Beacon vs Reference Beacon
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
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1/14/200512:00:00
1/15/20050:00:00
1/15/200512:00:00
1/16/20050:00:00
1/16/200512:00:00
1/17/20050:00:00
1/17/200512:00:00
1/18/20050:00:00
1/18/200512:00:00
1/19/20050:00:00
Ref
eren
ce B
eaco
n
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
8.1M
Bea
con
Reference Antenna Beacon8.1M Antenna Beacon
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ASC Signal Ka-band Products
Thermal Defocusing
-2-1.8-1.6-1.4-1.2
-1-0.8-0.6-0.4-0.2
00.20.40.60.8
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5/11/2005 14:00:00 5/11/2005 16:00:00 5/11/2005 18:00:00 5/11/2005 20:00:00 5/11/2005 22:00:00 5/12/2005 0:00:00 5/12/2005 2:00:00 5/12/2005 4:00:00
Sig
nal L
evel
(dB
)
11 am 1 pm 3 pm 7 pm
Heating
Distortion
Steering/Defocusing/Null Shift = Signal Loss
Beam Steering Simulation Asymmetric Reflector Distortion
20
25
30
35
40
45
50
55
60
65
70
-0.25 -0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2 0.25
Degrees Theta
Dire
ctiv
ity (d
Bi)
30 GHz Uplink Tracking Channel (20 GHz)
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ASC Signal EHF Products
SRT Thermal Compensation – Ka Band X-Y accounts for Steering Z axis accounts for De-focusing
ASC Signal Ka-band Products • Over 250 Earth Station Antennas delivered since 2001
• Operating in commercial and governmental networks
worldwide
• Offering unmatched mitigation options
• Available Technical Material from ASC
Antenna Product Descriptions
EHF SRT white paper (3rd axis)
Solar/De-Ice Characterization Report
Thermal Loading Summary Presentation
Range Test Qualification Reports
RF Specifications
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