Fig. 2
From: Rapid global antenna design by simplex regressors and multi-resolution simulations

Responses of simulation models of two fidelities (low-fidelity Rc (- - -) and fine model Rf (—)): (a) a miniaturized broadband monopole antenna (the model includes the SMA connector), the simulation times for Rf and Rc are about 400 s and 50 s, respectively; (b) a dual-band antenna, the Rf and Rc simulation times are about 90 s and 25 s, respectively.