Multifunctional shared aperture antenna for $L$ and $S$ band

Abstract

A novel concept of shared aperture to design microstrip patch antenna in the $L$ and $S$ Band. The structure is designed using simulation with $FR-4$ substrate of dielectric constant 4.3. Sharing of the aperture is used for two antennas using multifunctionality in two different frequencies. One of the designed antennas resonates at $1.945 GHz$ (for L-Band) and other at $3.255 GHz$ (for $S$-Band) with return loss value of $-17.56 dB$ and $-34.41 dB$ respectively. Overall gain obtained are $5.4 dBi$ and $5.6 dBi$ for $L$ and $S$ Band respectively with $VSWR< 2$. These antennas can be designed for multiple applications.