yagi antenna formula

dear friends while i was searching about Formulas of yagi antenna i find this web side and im asking if its right or not coz my teacher said there is no basic for that which is in the internet so dear friends do u have formules that can help me to desgin it


http://www.skyscan.ca/Antennas.htm

Dear consult the pages of the book 368-375
book name is Antenna Theory and Design by Elliott

i hope u wil find the solution with basics... further here is good website giving details
http://radio.meteor.free.fr/us/yagi_fm.html

That formula is ok, but in general to get the best performance the Yagi antenna needs some optimization (for elements length and spacing) which depends by some parameters as, thickness of the elements and antenna height from the ground.

Search on the subject on this site. I posted a reference for a book specifically on yagi's a while ago. I'll let you look for it .

Regards,

Azulykit

i think the formulas depend on the material used for fabrication. i m attaching this document check it as well,