Radio Frequency Systems company website is optimized for recent browsers :
IE9+, Chrome 31+, Firefox 31+, Opera 28+, Safari 7+

My e-catalog

Log Periodic Antennas
LPD 9 III Series

Rev : 01 | Rev date : 19 Sep 2014
The LPD 9 III series log periodic antenna is a directional wideband antenna, with low VSWR and without lateral lobes. It can be used in vertical or horizontal polarization due to its rear fixation.


  • Receiving from principal television emitters at re-emission stations
  • Directive emissions
  • High 9.5dBi gain
  • Multi-assembly possible
  • Easy to implement due to its low weight
  • Easily transportable as the rods can be dismantled
  • Individual packaging: 2.41 x 0.30 x 0.30m (15kg)
  • All the metallic parts of the antenna are connected to the ground, helping static load out-flow.

Technical features


Product LineAntenna TV
Product TypeBand III (High VHF) TV Log Periodic Antenna

Electrical Specifications

Frequency Range MHz170 - 230
Nominal Gain (Mid-band) dBd7.5
Return Loss dB> 19
Power Rating kW0.4
Min. Front to Back Ratio dB20
Impedance (unbalanced) Ω50

Mechanical Specifications

Input ConnectorN socket on RG213 U coaxial cable
Boom Length cm (in)200 (79)
Reflector Length cm (in)90 (35.4)
Effective Area Front (full antenna) No Ice m² (ft²)0.17 (1.83)
Effective Area Front (full antenna) with 12.5mm(0.5") Radial Ice m² (ft²)0.17 (1.83)
Wind Rating (no ice) km/h (mph)220 (140)
Wind Rating with 12.5mm (0.5") Radial Ice km/h (mph)150 (90)
Weight kg (lb)6.7 (14.7)

Packaging Information

Shipping Weight, Kg (lb)kg (lb)15 (33)
Shipping Dimension - Length cm (in)241 (94.9)
Shipping Dimension - Width cm (in)30 (11.8)
Shipping Dimension - Height cm (in)30 (11.8)


Material - Support Pole / MountingHot galvanized mounting interface
CoatingThermo gloss paint

Single LPD 9 III antenna

Superposition of two LPD 9 III antenna arrays powered at the same phase and amplitude.

Single LPD 9 III antenna

External Document Links


• Hot-galvanized fixation interfaces for diameter 50mm to 115mm tubes (available from diameter 30mm up to 150mm upon request)
• Power splitter (BJ) for antenna array
• Phasing coaxial straps
• Fitted, measured, low loss coaxial cables - any length
• Supporting pylons (SL 190 - SL 450, ...)