Çift Bant Mikroşerit GPS Anten Analizi ve Tasarımı

Abstract

This thesis contains design, production and measurements of dual bant microstrip GPS antennas. GPS antenna is designed which works L1 and L2 bands by used stacked structure microstrip antennas. The dual band circular polarization is achieved by corner truncation method. During the design process, the effects of antenna parameters on the input impedance and axial ratio characteristics are investigated step by step. First, antenna designs are investigated which individually radiation for each bands. Then, in stacked structure, antenna design is studied on L1 and L2 bands resonance at the same time with coaxial feeding technique and each bands have circular polarization by corner truncation method. The desired structure is analyzed by electromagnetic solver tool HFSS. Information about the design parameters are acquired by parametric analyses on HFSS. Designed anttennas are fabricated and measured. The measurement results of the fabricated antennas and simulation results are presented and compared with simulations.