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rob

yagi 2.4Ghz yagi

40 posts in this topic

,,, a new version of the patch-yagi antenna...

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,,,a good solution by choosing a bowl as a reflector...

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,,,okay,this is my draft,,,!!!

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I started to build one of that kind antennae and I was worried about tunning. I mean as you may see in my photos I was unsure about the distance between elements because of the thickness. I know they are so thick, but I am newbie. Any pieces of advices will be welcome to me!

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thickness of material > 2 mm ...why ??

should be 0.5-1mm

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This antenna can also be made with a rectangular patches...

 

 

 

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And simulation of CST...

New folder (5).zip

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Jomy 

I am confused with all that different sizes of patch and first director

which one give best gain ?

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 This difference, increases the bandwidth and increases the distance between directors can increase the gain of the antenna.

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I mean size or diameter of patch and disector.

first is  68 then i see 62 mm which one is proper?

 that is why i asking

 

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2 hours ago, Admin said:

 This difference, increases the bandwidth and increases the distance between directors can increase the gain of the antenna.

which one increases the bandwidth? vibrator?

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,,,the distance between the vibrator and the first director(0,073*lambda ) as well as their different size...!!!

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the farthest distance between vibrator and first director I've seen is 9-10mm..  

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 i see this on a given site link by you 

there is a patch even 60,5mm and  first director 58 mm instead 54 mm

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Hello,

I'm planning to build an  antenna of this type.

I have questions:

1) Is it possible to use aluminum sheet for the construction without changing the dimensions?

2) Is it possible to increase antenna gain by adding one or more directors ?  If yes, so what size and spacing ?

Thank you.

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1) yes,,, but the vibrator must to be weldable,..!!!

2) yes,,,, watch this forum carefully..!!!

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