g579
You do have a point... using small SMD resistors will work up well into the microwaves, but reading the orginal post, he intended to use 60 pcs!
Even using small SMD resistors will only help so much, the stray inductance and capacitance will prevent it from working at higher than UHF.
It would be interesting thou if someone did try make a try and see what is really possible with say 40-60 resistors! One should take into consideration what power dissapation you get too, it might be better to shoot for fewer but higher rated (i.e. larger 0805 or 1206) rather than a massive amount of smaller ones.
Cheers
/WD