Reconfigurable Printed Antenna for GPS Applications
Abstract
This final report discusses three issues related to the design of reconfigurable printed antenna for GPS applications. The first one deals with a brief study of four key parameters, namely, ring, ground plane and substrate dimensions as well as substrate thickness. The dependence of the radiation pattern on the dimensions of these parameters is discussed. Surface currents induced on the ring are also calculated to understand the behavior of the ring. We also compare the behavior of this antenna with the well known Yagi-Uda array and briefly present a scheme to reduce the overall size of the parasitic ring. The second topic addressed here deals with improvements made to a computer code based on the Finite Difference Time Domain (FDTD). Although the original code is reasonably accurate, it requires improvements in the calculation of the input impedance for probe-fed microstrip antennas. Another major improvement is needed to compute the radiation pattern of a patch with thin slots. These slots are needed to decrease the overall size of the antenna. The final topic discussed here is an study of the performance of a version of the reconfigurable antenna (there are two designs) in the presence of jamming signals. We also define coverage and calculate this parameter. The antenna is assumed to be mounted on an infinite planar ground plane. This is a rough model for a large cylindrical structure that will be used in the future to model the fuselage of aircraft.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2001
- Accession Number
- ADA396333
Entities
People
- K. W. Lee
- N. Surittikul
- R. G. Rojas
Organizations
- Ohio State University