Can I Use a Simple Dipole for a Yagi Uda Antenna at 2.5 GHz?

[blindwidow]

Hello there,
I know that folded dipole is used ofr a good matching in antenna systems. Is there a freqeuncy range for them to be used more efficiently? Or can we use both of them in the similar freqeuncy ranges?

 

[NoTime]

"efficiently" without a defined goal is a rather ambiguous term.

If you are looking for information on antenna design I would suggest the ARRL Handbook.

 

[berkeman]

It looks like the folded dipole has a little higher gain and broader bandwidth, but I didn't do much checking past this wikipedia page. My antenna books are at home at the moment, and I'm at work.

http://en.wikipedia.org/wiki/Dipole_antenna#Folded_dipole

 

[NoTime]

Any antenna with gain is directional.
Depending on the requirements, this can be counter productive.

 

[Ouabache]

Welcome to Physics Forums.. You'll find lots of interesting discussions here, as well as generally helpful advice.

Here is some additional food-for-thought on folded dipoles.
ref01, ref02

As far as frequency range goes. My thoughts are their characteristics are independant of frequency. Though lower frequency of operation (< 7MHz) translate to longer element lengths, which can be a cost consideration (you're virtually doubling the length over a standard dipole). Element stability will also become problematic (maintaining element spacing, wind-loading considerations)

 

[blindwidow]

thanks :D

Thank you all for your quick replies, we are supposed to design a yagi uda antenna working at 2,5 GHz. I tried to find the answer whether i can use the simple dipole at this freqeuncy or do i have to use folded dipole. It seems that simple dipole can be used. Since the construction will be easier, i decided to use simple dipole...

Thanks again to you all!