A high efficiency L-band microstrip antenna

Conference Paper · September 1999with13 Reads
DOI: 10.1109/APS.1999.789133 · Source: IEEE Xplore
Conference: Antennas and Propagation Society International Symposium, 1999. IEEE, Volume: 1


    The design of a high efficiency circularly polarized nearly square
    patch antenna at L-band is presented. One way to improve the efficiency
    of the inherently low efficiency microstrip antennas is to use
    substrates with a low permittivity. A low permittivity substrate with
    &epsi;<sub>r</sub>=1.1028 was obtained by using a combination of Rogers
    RT/Duroid 5880 and Rohacell hard foam. The effect of a 5 mils thick
    Rogers RT/Duroid 5880 superstrate on the efficiency was also studied.
    Results of the antenna efficiency and bandwidth for both the low
    dielectric substrate and superstrate are presented. The results were
    obtained using the 1E3D software package and compared with measured
    results. Efficiencies of the order of 85% for a single patch element
    were obtained