R. Afzalzadeh et Rn. Karekar, CHARACTERISTICS OF A RECTANGULAR MICROSTRIP PATCH ANTENNA WITH PROTECTING SPACED DIELECTRIC SUPERSTRATE, Microwave and optical technology letters, 7(2), 1994, pp. 62-66
A dielectric protecting superstrate with spacing on the order of one w
avelength from the rectangular microstrip patch antenna and of thickne
ss up to about half a wavelength shows very small variation in resonan
ce frequency (f(r) and reflection coefficient (GAMMA). Effects of the
same on radiation pattern (RP) includes drastic changes in beamwidths.
By use of the spaced superstrate the patch can be protected without t
he need to redesign parameters like f(r) and GAMMA. (C) 1994 John Wile
y & Sons, Inc.