Conference Paper

A high efficiency L-band microstrip antenna

Dept. of Electr. & Comput. Eng., Univ. of Central Florida, Orlando, FL
DOI: 10.1109/APS.1999.789133 Conference: Antennas and Propagation Society International Symposium, 1999. IEEE, Volume: 1
Source: IEEE Xplore

ABSTRACT 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
εr=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

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