Design of dual aperture coupled antenna and offset slot fed aperture coupled microstrip antenna

DESIGN OF DUAL APERTURE COUPLED ANTENNA AND OFFSETSLOT FED APERTURE COUPLED MICROSTRIP ANTENNAMicrostrip patch antennas play a very important role in the field of wireless communications because of their advantages such as low-profile, low-cost, easy fabrication of various types. Microstrip patch antennas are versatile in terms of various possible geometries that make them applicable to many different applications. In this thesis, two different coupled stacked microstrip patch antennas have been designed at Ku band.Our frequency spectrum is between 10.8 GHz and 12.75 GHz. The gains of the antennas are more than 9 dBi and VSWR is less than 2 for all frequency bands. The slot length isless than /4 for containing all frequency intervals.And hourglass shaped aperture is usedbecause it gives maximum coupling. The patch on the substrate is the radiating elementand the slot in the ground plane couples the energy from the microstrip feed line to thepatch and parasitic patch on the topmost substrate is used to increase bandwidth. Themicrostrip patches in the structure have dimensions nearly resonant dimensions ( ) atcenter frequency of operating band 11.9 GHz. The parasitic patch a little smaller thanradiating element.In Chapter 2 the beam controllable antenna which is the name of `Dual Aperture CoupledAntenna Design? has been designed. Also, its array synthesis and feed network design hasbeen presented. Simulations and measurements results have been displayed. In Chapter 3the main beam tilted antenna which is the name of `Offset Slot Fed Aperture CoupledMicrostrip Antenna? has been designed. Its array synthesis and feed network design hasbeen presented. Simulations and measurements results have been displayed.