No!

A Yagi is a moderately complex design. Generally a computer, or computer
generated graphics and length tables are used for element length,
spacing and boom length.

A 2.4 GHz Yagi would be close to 1/2 size, in all dimensions, of a 1.2
GHz antenna.

Your best bet is to buy a commercial antenna for your application.

AK

oldcrow wrote:

Hi!

If I was to take yagi antenna for 1.2 gHz and then double the length of
each element. Would that work on 2.4 gHz?

Bob