Title :
Study of various shapes of the coupling slot in CPW-fed microstrip antennas
Author :
Giauffret, Laurent ; Laheurte, Jean-Marc ; Papiernik, A.
Author_Institution :
Lab. d´´Electron., Antennes et Telecommun., Nice Univ., France
fDate :
4/1/1997 12:00:00 AM
Abstract :
A numerical modeling based on the solution of coupled integral equations is used for the characterization of CPW-fed aperture-coupled microstrip antennas. Various shapes of excitation slots, such as open stubs, slot loops, and capacitively and inductively coupled slots, are investigated in terms of return loss and front-to-back radiated power ratio. It is shown that a centered CPW open stub gives a minimum of back radiation while allowing for easy matching. The slot-loop excitation seems to be a convenient feeding mechanism that also allows the insertion of active devices
Keywords :
antenna feeds; antenna radiation patterns; capacitance; coplanar waveguides; electromagnetic induction; integral equations; microstrip antennas; slot antennas; CPW-fed aperture-coupled microstrip antennas; active devices; capacitively coupled slots; centered CPW open stub; coupled integral equations; coupling slot shapes; excitation slots; feeding mechanism; front-to-back radiated power ratio; inductively coupled slots; matching; numerical modeling; open stubs; radiation patterns; return loss; slot loops; slot-loop excitation; Antenna feeds; Antenna radiation patterns; Aperture antennas; Aperture coupled antennas; Coplanar waveguides; Integral equations; Microstrip antennas; Numerical models; Shape; Slot antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
