Improved aperture-coupled microstrip antenna By Mohamed Morsy

Aperture coupled antenna

Coplanar Patch Antenna The coplanar waveguide, compared with the microstrip line, has advantages such as low radiation loss, less dispersion, uniplanar configuration

Stacked slot coupled coplanar patch antenna Top view Side View Є1=6.15 , Є2= Є3=2.2

Radiation Pattern

Radiation pattern after increasing the aperture’s length

After adding metal sheet at the bottom substrate

Radiation pattern after adjusting the stub

Radiation pattern after adding metal sheet at the substrate and adjusting the stub match

S11

conclusion Using coplanar patch antenna is not a good choice in case of aperture coupled microstrip patch antenna although it has low radiation loss, less dispersion and high efficiency it will act as a reflector to the aperture slot radiation which radiates on both sides of the ground plane resulting in huge amount of back radiation that destroys the antenna functionality Depending only on stacked slot coupled antenna will give better results in terms of radiation pattern

Future work Using new innovation of aperture coupled microstrip antenna that gives better radiation pattern

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