Rectangular Patch Monopole Antenna with Different Shaped Multiple Slots for Triple Band Frequency Applications

Abstract

In this paper a rectangular patch microstrip antenna with different shaped multiple slots behaves as a triple band monopole antenna. It is designed for 0.96031-1.0464 GHz, 1.3766-1.5797 GHz and 2.1629-2.3708 GHz frequency bands. A rectangular patch monopole antenna with multiple slots i.e. hexagonal slot and rectangular slot is fabricated on the glass epoxy (FR4 lossy) of dielectric substrate with relative permittivity (ε_r) of 4.3, thickness of 1.6mm, loss tangent of 0.02 with a ground plane, fed with a 50Ω rectangular micro strip feed line. In these antenna three different bands with three return losses measured below -20 dB in which one is below -50 dB within its impedance bandwidth along with omnidirectional radiation pattern. This prototype antenna having an omnidirectional radiation pattern is measured for frequency range of 0-3 GHz. The measured reflection coefficients are far below of -10dB.The simulated result and experimental results are analyzed and verified after comparison.

Keywords: Rectangular Patch, Hexagonal slot, Rectangular slot, Monopole Antenna, Return Loss, Bandwidth, Gain, Efficiency, CST