Extended Data Fig. 4: Comparison of DP, PT-symmetric, and EP-locked systems.
From: Soft biodegradable implants for long-distance and wide-angle sensing
The pole-zero plots and the phase-frequency curves of a,d, DP system (\({\gamma }_{{\rm{r}}}={\gamma }_{{\rm{s}}}=0.01\), ωr = 1), b,e, PT-symmetric system (\({\gamma }_{{\rm{r}}}\to -{g}_{1}=-\,{\gamma }_{{\rm{s}}}-0.01\), ωr = 1) and c,f, EP-locked system (ωr1 = ωr2 = 1, \({g}_{{\rm{r}}1}={\gamma }_{{\rm{r}}2}=\mu \) = 0.95) under the same parameters κ = 0.003, ωs = 1. g-k, S11 of different systems, with the parameters of each system corresponding to Fig. 2e,f and above d-f. l,m, The phase-frequency curves of our system and EP-locked system for κ = 0.0001 and κ = 0 (without sensors) at resonance. Other parameters: ωr1 = ωr2 = 1, \({g}_{{\rm{r}}1}={\gamma }_{{\rm{r}}2}=\mu =0.95\). n, The zoomed-in view of m.
