THz rectangular slitted microstrip patch antenna design for biomedical applications, security purposes & drug detection

In this paper, a microstrip rectangular patch antenna with reduced ground capable of operating in terahertz (optical) frequency range has been designed and proposed. The antenna has been fed by microstrip feedline which has an input impedance of 292.6 Ω closely matching with the input impedance of SMA connecter of impedance 292 Ω for maximum power transfer to the antenna. The ground and patch of the propounded antenna have been made using annealed copper, whereas the seafoam is employed as the substrate material having dielectric constant ε_r=1. The proposed antenna is capable of operating in the frequency band of 1.69 THz to 1.82 THz with high gain and directivity of 5.95 dB and 5.78 dBi respectively. The rectangular slitted microstrip patch antenna (RSMPA) resonates at 1.752 THz frequency and has an overall bandwidth of 130 GHz. The performance of the proposed antenna design has been further analysed in terms of impedance bandwidth (THz), return loss (dB), VSWR, HPBW and impedance (ohms). The propounded antenna design can be successfully employed for biomedical applications and security purposes. The antenna simulation has been performed by using CST Microwave Studio 2014.