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28 Elements XPOL 2m Super Yagi EME Antenna PA144-XPOL-28-9 with superior G/T -0.79

28 Elements XPOL 2m Super Yagi EME Antenna PA144-XPOL-28-9 with superior G/T -0.79
Product Code: 1925
Price: 295.00€
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Superior G/T -0.79 EME and tropo Cross Polarized X-POL 2m Yagi antenna PA144-XPOL-28-9

Very high gain 144MHz EME-Tropo antenna with highest suppression of all sidelobes. Wideband operation 144 - 145 MHz.

2m-XPOL-Antenna-PA144-XPOL-28-9-Cross-Polarized

Electrical Specifications
Frequency Range: 144 - 145 MHz
Free Space Forward Gain: 16.63 dBi
Front to Back Ratio: 36 dB
3 dB Beamwidth: 28.4°
G/T -0.79
Nominal Input Impedance: 50 Ohm
SWR Across Entire Band: < 1.2
Maximum Power Input: 2 x 1000 W 
Matching Method: Direct feed through RG142 teflon common mode choke. 
Connectors: 2 x "N"
   
Mechanical Specifications
Boom length: 9.24 m
Boom : 40 x 40 mm different wall thickness
Element Diameter: All elements 8 mm
Longest element: 1.03 m
Guy rope support: Black painted Fiberglass rod 1m OD 25 mm
No. of elements: 2 x 14 (28 elements)
Element position: Slant configuration +-45deg
Turning radius: 5 m
Mounting Mast Diameter: 5/4" - 2-3/4" 43-70 mm or Square 40, 50mm
Survival Wind Speed:   150 km/h 
Transportation Packed Size Length: 2.5 m
Net Weight: 16.5 kg

 

TANT G/T -0.79:

2m-XPOL-Antenna-PA144-XPOL-28-9-TANT-GT-0.79

Please look at famous VE7BQH table new issue 99 here:

http://www.antennas-amplifiers.com/downloads/VE7BQH Charts.xls

Or on W7GJ location: http://www.bigskyspaces.com/w7gj/VE7BQH%20Charts.xls

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-28-9 Antenna, measured characteristics with calibrated HP8753ES Network Analyzer.

Measured S11 144 - 145 MHz at antenna connector:

Antenna-PA144-XPOL-28-9-Measured-S11-144MHz-Cross-Polarized-XPOL

Measured VSWR 144 - 145 MHz at antenna connector:

SWR-S11-PA144-XPOL-28-9-Antenna-144MHz-Dual-Polarity

One of the most important parameter in the "X" or "+" configuration of antennas is coupling.

We have measured on this PA144-XPOL-28-9 just excellent:

S21-Coupling-PA144-XPOL-28-9-Cross-Polarity-Antenna-144MHz

Better than -35 dB in the prime part od 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.

Dipole, balun, balun holder and element holder construction:

2m-XPOL-Antenna-PA144-XPOL-28-9-driven-element-area-detail

Boom-to mast bracket with guy rope support XPOL Antenna PA144-XPOL-28-9

Black acrylic painted Fiberglass rod 1m OD 25 mm

Boom-to-mast-bracket-with-guy-rope-support-XPOL-Antenna-PA144-XPOL-28-9

 

Boom to mast bracket with guy rope support. Protected industrial design.

Boom-to-mast-bracket-with-guy-rope-support

144MHz-XPOL-Antenna-PA144-XPOL-28-9

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