Model LPDS-225-400 225-400 MHz 13 dBi Gain 


Design Features: The LPDS-225-400 is a set of two similar log periodic dipole array which be stacked or bayed. The LPDS-225-400 high gain UHF aeronautical band log periodic dipole antenna use 6063T6 ultra corrosion resistant architectural anodized aluminum alloy and designed to provide wideband directional transmission/reception of radio signals from 225-400 MHz bands for military aeronautical ATC sites for ground-to-ground and ground-to-air communication without having the requirement of multiple antennas. The complete log periodic antenna is supplied with epoxy based powder coating finish to protect it further from severe environmental conditions. The extra spacers are used between the support booms to improve mechanical durability of log periodic antenna. The specially designed mounting arrangement results in fast installation. The LP antenna can be assembled in less than 5 minutes. This log periodic dipole antenna system is particular suitable for transmission, reception, monitoring, scanning and jamming applications due to its broad band design feature, and small size. This log periodic antenna provides strong performance over the entire 225-400 MHz UHF aviation band. Log periodic antenna does not use loading technique to reduce the overall size of array. The shipping length of antenna is less than 4 feet making it highly suitable for mobile and tactical applications. The antenna is designed as per 810G MIL-STD.
Constructions: The LPDS-225-400 assembled log periodic antennas (Single Antenna) outer-most dimensions are 1.1 meter (43 Inches) long and 0.66 meters (26 Inches) wide. The antenna has removable elements, the longest of which is 0.33 meter (13 Inches), making it highly suitable for easy of shipping/carrying/transportation and handling. All elements are supplied in two segments for easy of shipping and handling. The elements are attached via stainless steel nuts & bolts systems at points along the boom. The tactical log periodic antenna operates at D.C. ground with low resistance discharge path for protection against lightning and immunity to noise. All the screws, nuts and bolts of tactical log periodic dipole antenna are made of type 316 marine grade stainless steel. The mounting arrangement of log periodic antenna permits to change the polarization from horizontal to vertical and vice-versa. This high power log periodic antenna is supplied with either N-Female or DIN-Female connector depending on customer choice. The complete array is supplied with suitable 2 way power combiner/splitter & phasing harness cable.

Electrical Specifications:
Frequency Range225-400 MHz
Gain13 dBi
Bandwidth225-400 MHz
Antenna TypeLPDA
PolarizationVertical or Horizontal
Input Impedance50 Ohms
Radiation PatternDirectional
Horizontal Beamwidth -Half Power Points60 Degrees (if stacked vertically)
Front to Back Ratio18 dB.
RF Power Handling Capacity800 Watts
Input TerminationN-Female or DIN-Female
Lightning ProtectionDirect Ground

Mechanical Specifications:
Materials6063T6 Aluminum Alloy
Mounting Hardware -MaterialsMarine Grade Stainless Steel
Wind Rating200 Km/Hr.
Overall Length1100 mm
Shipping Length1200 mm
Support Boom -
Material - O.D.
Aluminum-Square Tube
25.4mm (1 Inch)
Elements - Materials
- Cross Section - Outer Diameter
Aluminum-Round Tube
12.7mm (1/2 Inch)
Maximum Mount Pipe Diameter 52 mm (2 Inches)
Gross Weight12 Kgs.

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