TYPE : HPSD 7el OWA 13,0 M
THERE ARE TWO VERSIONS ON THIS PAGE:
Version: april 2013.
Gain: 12,05 dBI (8,07 dBD) Gain: @ 18m heigth: 17,43 dBI Front to back: >28,1 dB Front to side: >23,97 dB Azimuth-Beamwidth: 45,2 degrees SWR bandwidth 2:1 1500 Khz SWR bandwidth 1:1 400 Khz Max Power: >10Kw Longest element: 5,58 meter Boom length: 13,00 meter Diameter: maco style. (5/8,1/2) Stacking distance: 9 meter Stacked Total gain: 14,37 dBI Element diameter: 5/8, 1/2 inch. Below the azimuth plot 12,05 dBI @27,1 Mhz
Below the elevation plot:
At 18 meter heigth the antenna is producing 17,43dBI above average ground.
The SWR pattern:
Below 2 x HPSD 7el OWA in a stack configuration. (9 meter seperated). Producing 14,37 dBI gain.
ELEMENT DIAMETER
Each element is made out of tubing "maco" uses.
In metric this will be : 15,875mm diameter (5/8 inch) for the central part of the element, which is 1,8288 Meter long.
Inserted goes the 12,7 mm diameter tubing (1/2 inch) to make up for the rest of the element length.
DO NOT CHANGE ELEMENT DIAMETERS OR INDIVIDUAL SECTION LENGTHS.
ELEMENT DISTANCES
Reflector - radiator : 1,45 Meter
Reflector - director 1 : 1,84 Meter
Reflector - director 2 : 3,63 Meter
Reflector - director 3 : 6,425 Meter
Reflector - director 4 : 9,835 Meter
Reflector - director 5 : 13,00 Meter
ELEMENT LENGTHS:
Reflector: 5,58 Meter
Radiator: 5,46 Meter
Director 1: 5,20 Meter
Director 2: 5,17 Meter
Director 3: 5,084 Meter
Director 4: 5,016 Meter
Director 5: 4,832 meter
FEEDING THE ANTENNA:
The antenna has 50 ohms impedance. It can be "direct" fed.
All you need to do is split the radiating element in half, isolate it from the boom and attach the coax on it.
Of course a RF choke / 1:1 balun is advised.
Any futher questions please feel free to mail !
VERSION TWO: 12,01 dBI wide SWR
Above the freespace azimuth plot :
Above the freespace elevation plot
Above the antenna placed at 18 meters above average ground (including ground gain)
Above the swr:
Above gain versus frequency:
Above front to rear versus frequency:
Above front to back versus frequency:
ELEMENT DIAMETER
Each element is made out of tubing "maco" uses.
In metric this will be : 15,875mm diameter (5/8 inch) for the central part of the element, which is 1,8288 Meter long.
Inserted goes the 12,7 mm diameter tubing (1/2 inch) to make up for the rest of the element length.
DO NOT CHANGE ELEMENT DIAMETERS OR INDIVIDUAL SECTION LENGTHS.
ELEMENT DISTANCES
Reflector - radiator : 1,47 Meter
Reflector - director 1 : 1,86 Meter
Reflector - director 2 : 3,63 Meter
Reflector - director 3 : 6,54 Meter
Reflector - director 4 : 9,80 Meter
Reflector - director 5 : 13,00 Meter
ELEMENT LENGTHS:
Reflector: 5,64 Meter
Radiator: 5,56 Meter
Director 1: 5,26 Meter
Director 2: 5,152 Meter
Director 3: 5,074 Meter
Director 4: 5,019 Meter
Director 5: 4,840 meter
FEEDING THE ANTENNA:
The antenna has 50 ohms impedance. It can be "direct" fed.
All you need to do is split the radiating element in half, isolate it from the boom and attach the coax on it.
Of course a RF choke / 1:1 balun is advised.
Any futher questions please feel free to use the forum