Figure 2. (a): first resonance frequency fr1 equal to 1.35 GHz, (b): increase the resonance frequency fr1 to 1.8GHz, (c): get a second resonance frequency fr2 of value 0.935GHz, (d): get the third resonance frequency fr3 equal to 2.375GHz, (e): obtain fr3 =2.4 GHz

From

Dual-layer Microstrip Antenna Design for Wireless Communications

Ghadah M.Faisal

American Journal of Electrical and Electronic Engineering. 2018, 6(2), 66-71 doi:10.12691/ajeee-6-2-3