World Leader in Advanced ILS Antennas

Model 107 End-Fire


HAVE YOU BEEN TOLD THE “SAME OLD STORY” ?


MODEL 107 (UPSLOPE)
END-FIRE GLIDE SLOPE ANTENNA SYSTEMS


For The Toughest Site Of Them All!


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 & neither should you. Click the Airport Improvement Magazine link button below, read the article regarding one of our installed End-Fire Antennas & you will see 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.

(Rear Antenna Shown)


ANOTHER TOUGH SITE SOLUTION BY WATTS ANTENNA COMPANY 

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

MODEL 107 (UPSLOPE)
END-FIRE GLIDE SLOPE ANTENNA

CATEGORY I INSTRUMENT LANDING SYSTEM

(Middle Antenna Shown)
A PROVEN FRANGIBLE SUPPORT STRUCTURE
 

For Category I ILS at the Most Difficult Sites

 

The Model 107 “Upslope” End-Fire has performance improvements over
conventional capture-effect (M-Array) image type systems. Sideband-only
(SBO) signal cancellation is maintained to higher elevation angles to reduce
multi-path at severe upslope sites.

 
 

 

THE EF-9 INTERFACE UNIT PROVIDES POWER DISTRIBUTION AND
MONITORING FOR THE ANTENNA SYSTEM.
(Dehydrator Unit (Bottom) and Air Pressure Line Monitor also Shown.
Designed to be Easily Adapted to any Transmitter and Monitor Electronics)

 
 

SPECIFICATIONS

Frequency Range: 329 to 335 MHz
Excitation:
CSB
SBO
CLR
3.0 W
150 to 500 mW
1.2 to 2.0 W, nominal
Input Impedance: 50 ohms
VSWR:
Main Antenna:
Clearance Antenna:
1.15:1
2.0:1
Radiation Pattern:

 

 

 

Main Antenna

Middle Antenna

Clearance Antenna

-3 dB beamwidth > 5 degrees azimuth
-9 dB beamwidth < 20 degrees azimuth
Front to back ratio > 12 dB

 

 

 

-3 dB beamwidth > 6 degrees azimuth
-9 dB beamwidth < 14 degrees azimuth
Front to back ratio > 12 dB

-3 dB beamwidth > 20 degrees azimuth
-9 dB beamwidth > 40 degerees azimuth
Front to back ratio > 12 dB

Glide Angle :(Electronic) 2.5 to 4.0 degrees (adjustable-relative to longitudinal slope)
Path Width: 0.70 degree
Power Requirement: 25-30 VDC: nominal 27 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
WWW.WATTSANTENNA.COM
EMAIL: INFO@WATTSANTENNA.CO
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Model 107 Downloadable Brochure

Watts 2019 Product Brochure