Old yagi-corner TV UHF antenna

[aurel 22]

Hi Admin and others !

As i said in PM i have question.

I have one old broken TV UHF yagi-corner antenna , and  what is left from antenna is

5 directors are OK . - bowtie shaped

half of  feed Point dipole  bowtie shaped

aluminum pipe as element holder with original holes.

I don't have reflector..

this is how original looks:

[aurel 22]

On the image ..is ordinary folded dipole as active element but i have on this one ith same shape as directors.

so my questions should be :

1 . can i use or made something else (aluminum wire mesh ) or another bowtie shape as Reflector?

2. because i have only one side of active element ...is it better to build another one bowtie shaped 

or to build one like is on image above?

thanks...  

[Admin 2545]

,,,why do not you make a bowtie dipole as the directors...???

[aurel 22]

I am not sure that i understand your answer.

Do you mean something like panel antenna with bowtie elements instead of rebuild this small yagi?

[aurel 22]

Do you mean like this:

[Admin 2545]

,,,yah...!!!

[aurel 22]

Ok

I mut explain why I ask..

as far as i remember when i use this type of antenna ii don't get solid results

then i become pissed off and cut aluminum thin and build yagi with 15 directors using 

folded dipol shape for all directors and of course with proper reflector

and all that time this antenna work excellent.

[Admin 2545]

,,,good, then greetings...!!!

[Admin 2545]

,,,hi buddy...!!!

,,,can you give the dimensions to a director....???

[aurel 22]

of course 

quick measuring from image

[Admin 2545]

[aurel 22]

ahh i see ...shape is little bit tricky..right

i do my best with small plastic measuring triangle

and here is .

For testing i will put it again on old holder to try it as yagi ...

[Admin 2545]

,,,thank you but is missing a dimension...!!!

[aurel 22]

ahh sorry missing dim is 63 mm

Edited April 11, 2019 by aurel

[Admin 2545]

,,,thanks...!!!

I will try to make a simulation for your antenna but tell me the frequency domain...!!!

[aurel 22]

It is suppose to be standard UHF antenna for 21-69 chanels 

so i think from 470-860Mhz ..right?

[Admin 2545]

,,,good, and the dimensions of the reflector, which are .. ??

[aurel 22]

I dont know because i dont have it...

[Admin 2545]

[Admin 2545]

,,,and these would be the results...

[aurel 22]

Thank you very much for simulation !!

But i don't understand what kind of dipol is that ????

looks like -E shape ???

what is that?

I have mateials for 5 directors bowtie shape

and for one bowtie "dipole" so probably results should be little bit better maybe 12dB gain

anyway even on your way i think that should work.

currently i cannot mount antenna on foof because of very bad weather here.

 

[Admin 2545]

,,,so your antenna should have been shown...!!!

[aurel 22]

Yes ..that was the original..!