problem need to solve it

please help i made a aquasi yagi antena but the substrate avaliable in my country
with epslon=4.3 i need asimulation with hfss for this substrate .the paper for quasi yagi recommended for pure deroude wich have epslon r = 10.2 so how can i apply
this diffrent simulation give the same result for paper

you have to redesign that antenna, change the dimension of antenna which agrees with parameter or ur own material. different epsilor r means different wavelength of the wave propagates in the material. bigger εr means smaller wavelength.

for the 1st try, if ur material has same thickness with paper's material's thickness, change the dimension of antenna by multiplying the old dimension by squareroot of the εr ratio (old one x √(10.2/4.3) )