In theory your RL is much better than what you can expect from FR4. Not only is loss tangent poor at 2.4 GHz , but permittivity wil reduce as frequency increases in this band above 500MHz from 2.4 to 2 with at least 10% tolerance. Polyamide resins such as Getek are better at loss tangent , but still high tolerance and also slight lower permittivity than spec @ 1MHz. Search for better specs @ 2.4 MHz before you try to realize your synthesized solution and perform a tolerance analysis. If your Q is >30, you are not factoring loss tangent. To get 1% accuracy on f requires very tight controls on supplier batches even if you pay for controlled impedance testing on supplier test coupon.