Fig. 3: Impedance-matching capability analysis for FPRFS IMNs.
From: A multifunctional smart field-programmable radio frequency surface

a A double-stub IMN pattern programmed on the FPRFS. b The circuit model of the FPRFS emulated double-stub IMN. c The impedance-matching process illustration of the double-stub IMN on the Smith chart. d All matchable load impedance circles plotted on the Smith chart. e The function of impedance-matching capability versus the segment unit length. f The function of impedance-matching capability versus the operating frequency.