Coupled C-band stacked antenna using different dielectric constant substrates for communication systems

This paper proposed a coupled C-band stacked dual resonant antenna using different dielectric constant substrates for communication systems. The antenna operates in C-band resonating at two different frequencies. Two different substrates FR4 and Mica are used in this antenna structure. The stacked antenna design is fed coaxially at the central patch keeping the other three patches as parasitic patches. The antenna is optimized to obtain an impedance bandwidth of about 8% and 7% in the two bands respectively with a peak gain of 9.5 dBi and side lobe level of −12.2 dB at the resonant frequency. The antenna has obtained very good cross-polarization of about −28 dB in YZ-plane and even less than −40 dB at XZ-plane. The efficiencies at both the resonances are very good and the other simulated results are in good agreement with the measured results.