Title :
Superstrate effects on slot-coupled microstrip antennas
Author :
Huang, Chang-Hsiu ; Hsu, Powen
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
9/1/1991 12:00:00 AM
Abstract :
An analysis for studying the superstrate (cover) effects on the slot-coupled microstrip antennas is presented. The approach is based on the reciprocity theorem and uses the grounded double- and single-layer dielectric slab Green´s functions in a moment method solution for the unknown slot fields and patch currents. From these fields and currents, various characteristics of the antenna can be extracted, such as the radiation efficiency, directivity, input impedance, and resonant frequency. Numerical calculations showing superstrate effects on these antenna characteristics are presented. The input matches obtained from proper adjustment of the slot and patch dimensions are discussed.
Keywords :
Green´s function methods; electric impedance; matrix algebra; microstrip antennas; directivity; double-layer dielectric slab Green functions; input impedance; matrix elements; moment method solution; numerical calculations; patch currents; radiation efficiency; reciprocity theorem; resonant frequency; single-layer dielectric slab Green functions; slot fields; slot-coupled microstrip antennas; superstrate effects; Antenna feeds; Dielectrics; Geometry; Green´s function methods; Impedance matching; Microstrip antennas; Permittivity; Resonant frequency; Slabs; Slot antennas;
Journal_Title :
Magnetics, IEEE Transactions on
