These three element directional yagis are very robust and are manufactured to a high degree of Telecommunication specifications. They give a gain of 6dB over a 1/2 wave dipole and can withstand a maximum input power rating of 200 watts. The dipole element is made from one piece of tube, thus removing potential high resistance points and the balun is completely seal moulded in black carbon-loaded polyethylene to protect the internal electrical connections. These antennas can be stacked and fed in phase with a matching harness for increased gain.

Gain over 1/2 wave dipole  6 dB 
V.S.W.R. Better than 1.5:1 over the operating band 
Maximum input power rating 200 Watts 
Input impedance 50 Ohms 
Band width +/- 7% of the centre frequency 
Polarisation Vertical or Horizontal 
Half power beam width E plane 60 degrees     H plane 82 degrees 
Front to back ratio 18 dB 
Connection 3 metres of RG213 fitted with N-Type socket and PVC sleeve 
Support boom 1 1/4" x 12 swg aluminium alloy tube - HE30TF 
Radiating elements 3/4" x 16 swg aluminium alloy tube - HE9TF 
Castings Kemloc aluminium alloy 
Insulator Black carbon polyethylene 
Nuts & bolts 18/8 stainless steel and A2 Nyloc nuts 
Weight and Windloading 
   70MHz = 4.5kgs   - 22kgf @ wind velocity of 160kph 
  106MHz = 3.9kgs - 13.1kgf @ wind velocity of 160kph 
  139MHz = 3.1kgs - 12kgf @ wind velocity of 160kph 
  165MHz = 2.5kgs - 8.5kgf @ wind velocity of 160kph 
  190MHz = 2.0kgs - 7.4kgf @ wind velocity of 160kph

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Radio Structures Ltd - Antenna

VHF Antenna - UHF Antenna - Antenna Array - Log Periodic Antenna - Corner Reflector Antenna - Colinear Antenna - End Fed Dipole - Yagi Antenna - Centre Fed Dipole - Down Fire Antenna

Tel: 01604 790005 - e-mail: sales@radiostructures.com