International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 07 | Jul 2023
p-ISSN: 2395-0072
www.irjet.net
PERFORMANCE EVALUATION OF SEMI CIRCULAR SHAPED PATCH ANTENNA USING PROBE FEED TECHNIQUE BY VARYING SUBSTRATE THICKNESS Parimal Tiwari1, K K Verma2 and Chandan3 1Research Scholar, Department of Physics and Electronics, Dr. Rammanohar Lohia Avadh University, Ayodhya, U.P.,
India.
2Professor, Department of Physics and Electronics, Dr. Rammanohar Lohia Avadh University, Ayodhya, U.P., India. 3Assistant Professor, Department of ECE, IET, Dr. Rammanohar Lohia Avadh University, Ayodhya, U.P., India.
--------------------------------------------------------------------------***--------------------------------------------------------------------Abstract- In this research article, a semi-circular patch antenna’s performance has been evaluated with respect to S11
parameter and VSWR in which probe feeding technique has been incorporated and also its position is varied along with the substrate thickness. The substrate thicknesses taken are 1.6mm, 2.4mm, 3.2mm and 4.0mm. The antenna dimension is having patch radius of 30mm and the ground size of 50mm X 70mm. The proposed antenna is simulated on IE3D simulator and the S11, VSWR, gain and bandwidth of the antenna at different values of thickness of substrate are presented.
Keywords: Semi-circular, VSWR, S11, gain, IE3D simulator. 1. INTRODUCTION: In today's era of miniaturization, there is a growing need for antennas that are conformal and planar in structure. Microstrip antennas (MSAs) have gained significant popularity in practical applications due to their numerous advantages (references 1 to 4). In personal communication applications, the demand for compact MSAs is high since the available area for accommodating the antenna is limited. In [5], a semi-circular patch antenna is presented in which three bands are achieved with waveport feeding technique to excite the antenna and thickness of substrate is 1.6 mm. some more circular and semicircular antenna have also been simulated for deep characterization. The systematic study highlights the behavior in terms of resonant modes of shorted patch [6]. In [7], a new and innovative design is presented for a compact suspended semicircular patch antenna with a half U-slot, allowing for dual-frequency operation. In order to thoroughly investigate this novel configuration, a parametric study is conducted, where the length and width of the slot, as well as the radius and position of the coaxial feed probe, are systematically varied. By incorporating a half U-shaped slot into a semicircular disk [8], a dual-frequency resonance antenna is achieved. The research reveals that the resonance frequency of the antenna is inversely proportional to the length and feed point of the slot, whereas it increases with the widening of the slot width and the radius of the coaxial probe feed. In [9], wideband T-probe proximityfed regular circular and compact semicircular patch antennas are introduced. The research includes experimental measurements and computed results obtained using the finite-difference time-domain (FDTD) method. In this research article, the investigation is performed on the performance of the semicircular patch mounted on the substrate having the dielectric constant 4.2 by varying the thickness of substrate from 1.6 mm to 4.0 mm with the step size of 0.8 mm. the VSWR and the S11 parameter has been compared at all the four values and the corresponding impedance bandwidth and gain are also compared.
2. ANTENNA DESIGN: The antenna proposed here in this article is designed using the semicircular patch of the radius of 30 mm on the substrate having the ground dimensions of 50 mm X 70 mm. the probe feeding technique has been incorporated to excite the antenna. The simulation parameters are listed down in the Table 1 mentioned below.
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