Slotted Circular Microstrip Patch Antenna for Wireless Application

Author (s):

  1. Ankit Ponkia, Shantilal Shah Government Engineering College, Bhavnagar, Gujarat, INDIA
  2. Vivek Unadkat, Atmiya Institute of Tech. and Science, Rajkot, Gujarat, INDIA,


This paper presents modeling and designing of slotted circular microstrip patch antenna. Circular patch antenna can be create by treating the patch, ground plane, and the material between the two as a circular cavity. As with the rectangular patch, the modes that are supported primarily by a circular Microstrip antenna whose substrate height is small (h << ?) are TMzwhere z is taken perpendicular to the patch. Rectangular and circular patch configurations are commonly used for use in wireless applications due to their low-profile structure. Therefore they are extremely well-suited for embedded antennas in handheld wireless devices such as cellular phones, pagers etc. This paper focus on the bandwidth enhancement of microstrip circular patch antenna by introducing a narrow rectangular cross slot at center of circular patch. The design and analysis has been carried out by Finite Element Method based HFSS™ EM Simulator. Results of the simulated structure show wide band operation, with good VSWR/Return Loss, radiation pattern and gain as depicted in the graphs. The far-field radiation pattern along with field distributions are plotted, physical sensitivity of the feed location also studied.

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