World Leader in Advanced ILS Antennas

Model 105 End-Fire

Watts Antenna Company’s Model 105 EFGS Antenna System

For Category I/II/III ILS

HAVE YOU BEEN TOLD THE “SAME OLD STORY” ?
Have you been told that you cannot get ILS service at your airport because the site is too difficult?  Throw that old report away! We don’t believe it …and let us tell you why!

End-Fire antennas can offer numerous benefits over conventional image systems:

  • Significant Cost Savings by Avoiding Expensive Ground Plane Conditioning.
  • Provide ILS Service where Previously not Possible or Cost Effective due to Terrain.
  • Proven Frangible Low-Profile Design Permitting “Next to Runway” Installation.
  • Save the Wetlands or Avoid High Wetland Relocation Costs.
  • Waterside Installations Since the Signal is not Degraded by Tidal Variations.
  • Precision Glide Path Guidance is Achieved with Narrow Lateral Radiation
  • Patterns that Reduce Multi-path Signals from Buildings or Mountainous Terrain.
 
 

 

What About Improvements to Airport Efficiency?

The End-Fire Critical Area Size Is Substantially Smaller And Can Mean
More Operations Per Hour!

End-Fire Glide Slope Antenna Systems:
The Model 105 – For Category I/II/III ILS

 
CATEGORY I/II/III INSTRUMENT LANDING SYSTEM
WHEN NO OTHER SYSTEM CAN DO IT!
MODEL 105
END-FIRE GLIDE SLOPE ANTENNA

 
 

A PROVEN FRANGIBLE SUPPORT STRUCTURE
(Rear Antenna Shown)
 
 
THE EF-9 INTERFACE UNIT PROVIDES POWER DISTRIBUTION AND
MONITORING FOR THE ANTENNA SYSTEM
(Designed to be Easily Adapted to any Transmitter and Monitor Electronics)

 

 

SPECIFICATIONS

Frequency Range: 329 to 335 MHz
Excitation:
CSB
SBO
CLR
4.0 W (typical)
200 to 500 mW
400 mW to 2.5 W
Input Impedance: 50 ohms
VSWR:
Main Antenna
Clearance Antenna
1.25:1
2.0:1
Pressurization: Dry air, constant, 3 to 9 PSI nominal, stable pressure preferred
System Air Volume: 7.70 cu. ft. (218.0 litres) (approximate)
with specified dielectric coaxial cables
Dehydrator Run Time: 8.7 minutes to pressurize (Andrew MT300 only)
1.5 hours in a 24-hour period (Andrew MT300 only)
Dehydrator Idle Time: 2.4 hours between cycles (Andrew MT300 only)
22.5 hours in a 24-hour period (Andrew MT300 only)
Radiation Pattern:

 

 

 

 

 

 

 

 

Main Antenna

Clearance Antenna

 -2 dB beam width > 13 degrees azimuth

 

 

 

 

 

 

 

 

-10 dB beam width < 30 degrees azimuth

Front to back ratio > 12 dB

Maximum lateral radiation nominally -19 degrees and 11 degrees

relative to the runway center-line with a null in the region of main antenna maximum radiation

Front to back ratio > 12 dB

Glide Angle: 2.5 to 4.0 degrees relative to horizontal (adjustable)
Path Width: 0.70 degree, (nominal)
Power Requirement: 22-30 VDC, (nominal 28 VDC) @ 0.98 amp maximum
Duty Cycle: Continuous, unattended
Outdoor  Equipment:
Temperature
Relative Humidity
Altitude
Wind
Ice Loading
-50 to +70 degrees C
5 to 100 percent
0 to 10,000 feet
0 to 100 mph
1 inch radial clear ice
Indoor Equipment:
Temperature
Relative Humidity
Altitude
-10 to +50 degrees C
5 to 90 percent
0 to 10,000 feet
 

 

WATTS ANTENNA COMPANY
70 North Plains Road – Suite H
The Plains, Ohio 45780-1156
USA – Manufacturing Facility
Phone: +1.740.797.9380; Fax: +1.740.797.9787

EMAIL: INFO@WATTSANTENNA.COM

Watts 2019 Product Brochure

Model 105 Downloadable Hi-Resolution Brochure

System Layout & Construction: Drawing and Notes

Complete Section 9: Installation and Tune-up from Instruction Book

Download Model 105 Instruction Book

Download Model 105 Optimization Supplement

Download the “Items Needed But Not Supplied” Supplement