International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 04 | Apr 2023
p-ISSN: 2395-0072
www.irjet.net
Design and Performance Analysis of an Inset Feed and Slot Configuration on Circular Patch Ultra-Wideband Antenna Chanprit Kaur1, K K Verma2 1Research Scholar, Department of Physics and Electronics, Dr. Rammanohar Lohia Avadh University, Ayodhya
, U.P. , India
2 Professor, Department of Physics and Electronics, Dr. Rammanohar Lohia Avadh University, Ayodhya U.P.
India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - This paper presents a new design for a compact
to 4.5 GHz), Wi-MAX frequencies (5.4 GHz to 6.45 GHz), and VSWR values below 2.
omnidirectional monopole antenna, suitable for broadband applications. The antenna features a modified circular patch, with a size of 40×45×1.6 mm3, and is simulated and fabricated using FR-4 substrate. The proposed design covers a frequency range of 2.4-11.24 GHz, which meets the UWB range of 3.110.6 GHz. The paper explores the effect of incorporating an inset feed on the circular patch. The resulting low-profile monopole antenna has a return loss of -27.94 dB and -31.07 dB, resonating at 3.38 GHz and 5.36 GHz respectively, which includes the WLAN and Wi-Max bands. The antenna's performance parameters, such as reflection coefficient, bandwidth, and radiation pattern, are simulated using CST2022 Microwave simulation software, and the results are compared with experimental data.
2. ANTENNA DESIGN AND PERFORMANCE The proposed antenna's geometry is illustrated in Figure 1, displaying both its top view and bottom view, as seen in Figure 1(a) and Figure 1(b). The monopole circular patch antenna's dimensions are as follows: a width of Ws=45 mm, a length of Ls=40mm, and a substrate (FR-4 epoxy) height of T=1.6 mm, featuring an epsilon value of 4.3 and a loss tangent of 0.02. The circular patch has a radius of R=9.5 mm, and its feed line has a length of Lf=20.3mm and a height of t=0.02mm. To modify the traditional circular shape, the antenna has three semicircular slots with a radius of r =1.75mm. To investigate the effect of inset feeding, the proposed antenna was modified with an inset feed, featuring a length of y=3mm and a width of x=0.5 mm, which was selected after parametric analysis to ensure good impedance matching of 50Ω. The other side of the substrate is ground. The ground structure of the proposed antenna has a copper material with a length of 20 mm, a width of 40 mm, and a height of t=0.02 mm. Initially, the ground structure was a fullplane structure which resulted in a narrowband antenna. To improve the antenna's performance and convert it into an ultra-wideband antenna, the ground structure was modified to be partially grounded with the incorporation of three square slots with dimensions of 1×1 mm2. The simulated results of the return loss are shown in the figure, and the resonant frequency is measured with a reference line of -10 dB.
Key Words: Omnidirectional antenna, Inset feed, UWB antenna, Wi-Max, WLAN.
1. INTRODUCTION With the rapid expansion of modern communication, there is a growing need for high data rates, reduced power consumption, and minimal interference with other communication devices [1]. Ultra-wideband (UWB) antennas offer a wide bandwidth and are ideal for wireless communication systems due to their increased gain, simplicity, and high data rates [2]. UWB technology allows for short pulses in a broad range of frequencies with straightforward structures [3]. The decision by the Federal Communication Commission (FCC) in February 2002 to authorize low power with large bandwidth between 3.1 to 10.6 GHz has opened up numerous possibilities for broadband applications. Several methods have been used in the literature to achieve UWB applications, including inset feed [7-9], taper feed [10, 11], CPW feed [12], among others. The current study proposes the design of a circular monopole antenna (40×45×1.6 mm3) for UWB applications, featuring an impedance bandwidth range from 2.411.24GHz. The impact of incorporating an inset feed and truncated ground on the antenna is also examined. The microstrip patch antenna presented in this study is compared to previous literature, demonstrating greater compactness, enhanced bandwidth, and increased gain. The antenna's performance is focused on WLAN frequencies (2.9
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Figure. 1: Diagram of Proposed Antenna (a) front view-The Patch (b) back view-Ground structure
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