Here is my 4-element yagi for six. This antenna is a DK7ZB design. For a detailed description of this antenna I recommend a visit to the authors site.http://www.mydarc.de/DK7ZB/6m/428-breit.htm Anyway, here is the antenna essentials: Boom is made of 20x20mm square aluminium tube and passive elements are made of 10mm aluminium tube. Radiator is a mix of 16mm and 12mm.
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Element
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Element-position
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Element-length
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Reflector
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0 mm
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2980 mm
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Radiator
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510 mm
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2930 mm
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Director 1
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965 mm
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2776 mm
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Director 2
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2180 mm
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2574 mm
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Current simulation
Current simulation in MMANA-GAL.
SWR Simulation
Image shows SWR simulation in MMANA-GAL.
Free space plots.
Image shows free space far fiels plott in MMANA-GAL.
Real ground plots.
Here is antenna simulated 6m over real ground.
Antenna workshop.
Early stage photo.
Boom
Here is the boom ready.
Radiator
Close up of central radiator parts.
Another photo of central radiator parts.
Radiator fixing
Clamps for holding radiator.
Passive element fixing
10mm tube holders for elements.
Radiator terminals.
Close up of radiator terminals.
Radiator junction box
Radiator junction box
The DK7ZB-Match for Yagis
The DK7ZB-Match for Yagis
Lambda/4 2x75ohm RG6 Coax-cable for matching 28ohm load to 50hom feeder. http://www.dk7zb.fox28.de/dk7zb-match.htm
Radiator junction box
Junction box close up.
Junction box close up.
Junction box close up.
VNA analyzing
Initial vna check for element adjustments.
SWR check at 1.3m
Checking SWR at 1.3m height over ground.
SWR result at 1.3m
SWR plot at 1.3m height.
SWR check at 6m
Checking SWR at 6m height over ground.
SWR result at 6m
SWR plot at 6m height.
Antenna in place
Antenna at temporary location with hand rotation.
On air test
Antenna showing very good results on the LP-100 meter
First edition: 07.06.2007
Lastest edit: 17.03.2012
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