Click here to visit the Home Page of Antenna Experts
Click here to visit the Home Page of Antenna Experts
 Model AQY-128 117 - 137 MHz 17.5 dBi Gain 


Design Features: The aviation band quad stacked yagi antenna system is highly suitable as base station antennas for ATC sites where longer communication range is required to cover the particular sector of Flight Information Region (FIR) like narrow but long strip if stacked side-by-side or Oceanic Information Region (OIC) of a bay if stacked vertically as shown in the figure. The unique design of the yagi antenna feed which works as matching device to keep the VSWR low resulting in increased efficiency of the yagi antenna. The aviation band quad stacked yagi antenna is supplied with N termination fixed on the driven element. This directional yagi antenna, comes factory tuned and does not require any field adjustment.
Constructions: The VHF aviation band array system is consisting of 4 yagi antenna each having 6 elements, supplied with a solid air cored 4 way power splitter/combiner and four low loss phasing harness cables. Radiating elements, supporting booms and adjoining metal castings of yagi antenna system have been constructed in high quality aluminum alloys to prevent corrosion. The VHF ATC yagi array system when packed comes with elements removed from the antenna boom for ease of packing and transportation. This array can be assembled at site with simple hand-tools.
The antennas system can be configured in square formation to control the beam-width in desired plane.

Electrical Specifications:
Frequency Range117 - 137 MHz
Gain17.5 dBi
Bandwidth6 MHz
Antenna TypeYagi
Input Impedance50 Ohms
Radiation PatternDirectional
Beamwidth -3dB.12 Degrees (Vertical)
Horizontal Beamwidth -Half Power Points65 Degrees
Front to Back Ratio21 dB.
VSWR - Equal To or Better Then1:1.5
RF Power Handling Capacity1000 Watts
Input TerminationN-Female or DIN-Female

Mechanical Specifications:
Antenna MaterialsAll Aluminum
Mounting Hardware -MaterialsStainless Steel
Wind Rating200 KMPH
Overall Length2.2 Meters (each antenna)
Shipping Length2.5 Meters
Support Boom
- Materials
- Cross Section
- Outer Diameter.

Square Tube
25 mm
- Materials
- Cross Section
- Outer Diameter.

Round Tube
19 mm
No. of Yagi Boom4 Nos.
Maximum Mount Pipe Diameter 51 mm (2 Inches)
Gross Weight35 Kgs.

Environmental Specifications:
Operating Temperature(-)30 to +70 Degrees Celsius
Storage Temperature(-)40 to +80 Degrees Celsius
Humidity0 to 95% RH