Circularly polarized dual band microstrip patch antennas with multiple techniques

Abstract

In this paper, compact circularly polarized dual band microstrip patch antennas with multiple techniques are presented. Two patches as receiver and transmitter are printed on a FR4 substrate with relative permittivity of 4.4. Various techniques are employed to achieve circular polarization (CP). Defected ground plane (DGP) is utilized for size reduction. Simulated and measured results are presented for verification.