circular patch antenna
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Abstract In this work, a circular patch antenna is designed and a parametric study in terms of different geometrical parameters is conducted. As a second step, a parasitic chip is introduced on top of the proposed circular patch antenna in the aim to enhance the gain and antenna efficiency. The proposed antenna operates at 25.61 GHz (With a frequency range between24.383 GHz and 27.7 GHz), suitable for 5G applications. The antenna modelling with and without parasitic chip, along with the performance analysis is conducted with CST Studio Electromagnetic (EM) simulator software. A compact size of 10×10×1.547 mm3, easy to fabricate, broadband characteristics up to 3.31 GHz with a high gain up to 6.87 dB, total efficiency of 95 % and a minimum return loss low than -68.02 dB covering the operating frequency range. Lastly, to investigate and validate the antenna overall performance, both frequency and time domain-based simulation is performed, and a good agreement is obtained.

Microstrip patch antenna is attractive for various applications due to its easy fabrication, low cost and small size. It simply comprises of a radiating patch and ground plane that are separated by a dielectric substrate. However, the resonance bandwidth of the microstrip antenna is still an issue that needs to be considered in research. This paper aims to enhance the bandwidth of a microstrip antenna or introduce more resonant frequencies within the Super High Frequency (SHF) band. The paper demonstrates empirical results for circular-shaped patch antenna using the High Frequency Structure Simulator (HFSS). It begins by investigating different patch sizes and substrate materials, so that an optimal preliminary design is introduced. Then, different slot shapes are inserted into the patch for significant enhancement of the resonance characteristics. As a result, new ultra-wideband (UWB) antenna designs are presented with bandwidth results reaching 15.5 GHz within the C, X, Ku and K bands. Also, new multiband antenna designs are presented with improved reflection valleys in the Ku, K and Ka bands.

Abstract: The evolution of wireless communication system has led path for innovative antenna design specifically in wideband antenna for WiMax application. In this paper design and simulation of microstrip wideband circular patch antenna array operating between 2GHz to 4Ghz is presented. The circular patch antenna is designed to operate at 3GHz line feed and the ground is itched to achieve required wideband characteristics. The simulation is carried out in EM Flow solver, High Frequency Structure Simulator software. For a single patch antenna, the return loss, lesser than -10dB throughout the bandwidth. Later an antenna array is operating between 2GHz to 4GHz frequency is designed and simulated. The return loss is lesser than -12dBi throughout the band and a peak gain is 14.7dBi. Keywords: Microstrip Patch Antenna (MPA), High Frequency Structure Simulator (HFSS).