2 meter 28 elements superior G/T EME XPOL antenna 2m28XPOL
Extreme gain for super weak EME – Q65 MAP65 signals on 144 MHz band. Highest possible suppression of all side lobes and the best G/T for antenna length.
100 W with this 2 meter XPOL antenna is enough to work many EME stations
Electrical Specifications 2m28XPOL (PA144-XPOL-28-9BGP)
Frequency Range: 144 – 145 MHz
Free Space Forward Gain: 16.4 dBi
Front to Back Ratio: 35 dB
3 dB Horizontal Beamwidth: 28.4°
G/T: -0.74 dB
Polarization: Horizontal, Vertical, RHCP, LHCP with phase shift
Distance Between Dipoles: 520 mm
Nominal Input Impedance: 50 Ohms
SWR Across Entire Band: < 1.2
Maximum Power Input: 3000 W for both antennas
Matching Method: Direct feed through common mode choke (current balun)
Connectors: 2 x “N”
Mechanical Specifications 2m28XPOL
Number of Elements: 28 (14 + 14)
Element Diameter: 8 mm Aluminum tube
Dipole Diameter: 8 mm Hard Copper tube plastic coated
Longest Element: 1040 mm
Element Mounting Position: Above the Boom. Slant configuration +-45°
Balun and Connectors: Included
Boom Length: 9.35 m
Single Antenna Length: 8.82 m
Boom Size: Tapered Boom 40×40 mm, 30×30 mm, 20×20 mm
Number of Boom Pieces: 7
Guy rope support: Yes, Included
Mounting Mast Diameter: 43 – 70 mm 1-11/16″ – 2-3/4″ OD
Clamp: M8 Stainless Steel
Survival Wind Speed: 150 km/h
Net Weight: 13 kg
Gross Weight: 15 kg
Transportation Length: 1.5 m
TANT G/T -0.79:
Press “VE7BQH 144 MHz Tables” ROW 256 and 257. Or search “PA144”
One of the best performing antennas on the table for its sizes.
PA144-XPOL-28-9BGP – 2m28XPOL Antenna, measured characteristics with calibrated HP8753ES Network Analyzer.
Measured S11 144 – 145 MHz at antenna connector:
Measured SWR 144 – 145 MHz at antenna connector:
One of the most important parameter in the “X” or “+” configuration of antennas is coupling.
We have measured it on this 2m28XPOL. Just excellent:
Better than -35 dB in the prime part of 2m band. Which is more than sufficient for any purpose.
We consider that mechanical construction is even more important than electrical parameters. That will lead to many years of trouble free operation.
Black acrylic painted Fiberglass rod OD 25 mm
Boom to mast bracket with guy rope support.
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