Design and Implementation of a Single Feed Dual Band Microstrip Patch Antenna For GPS Applications

Abstract: The purpose of this paper was to design and implementation a single feed, dual frequency ( L1, L2) patch antenna for the Global Positioning System (GPS). The results from the simulation and measurement for this antenna is presented, compared, and used as part of the validation process for the dual frequency, right hand circularly polarized patch antenna designed for GPS L1, L2 operation. This prototype antenna design was targeted at dual frequency, high accuracy civil applications for future GPS applications. The antenna was designed based on the simulations from Computer Simulation Technology (CST), through which the radiation patterns and other antenna parameters were generated such as return loss (S11), gain, VSWR, and axial ratio (AR). The proposed antenna has overall dimensions 81.5*81.5 mm 2 . The predicted performance of this prototype antenna from CST simulation generally matches the performance specification for a GPS dual frequency patch style antenna. The simulation and measured results showed good agreement.