Figure 9.

Numerically evaluated system response obtained from the investigated scenarios. The real part of the system input impedance as a function of the frequency for the unloaded (red, dashed curve) and bent slab (green, full curve) are represented. The operating frequencies of the three system unit cells under the unloaded condition are approximately 161, 183, and 232 MHz, respectively, from SR1 to SR3. Due to bending stress, the operating frequencies of the three unit cells shift approximately to 162, 185, and 233.5 MHz, respectively, from SR1 to SR3, in conjunction with a significant variation in peak amplitude.