International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 08 | Aug 2023
p-ISSN: 2395-0072
www.irjet.net
DESIGN AND ANALYSIS OF LINE FEED CIRCULAR MICROSTRIP PATCH ANTENNA WITHOUT SLOT AND WITH LOADED S- SLOT FOR C AND XBANDS APPLICATION. Mahesh Narayan1, Prof. K.K. Verma2 1 Research Scholar, Department of Physics and Electronics. Dr. RammanohaLohiaAvadh University Ayodhya.U.P,
India.
2 Prof. K.K Verma Pofessor, Department of Physics and Electronics Dr. Rammanohar Lohia University Ayodhya. U.P,
India ---------------------------------------------------------------------***--------------------------------------------------------------------As a result, it fetched the attention of inventors, investors Abstract - This paper presents design, simulation and
and scientists to prompt and motivate more research into improvements in related fields. Researchers have made mutifold efforts to overcome these challenges through various mechanisms. One ,out of these mechanism, to achieve desirable resonant frequency and improved band width, is modificationon in figuration of different shapes of patch likeS-shape, L-shape, E-shape with various dimensions[5-7]. Another mechanism to improve band width is modification in the shape of patch by cutting slots in it, like U-Slot, V-Slot , E-Slot and S-Slot [9-11].Thus patch and slot are two different parameters and constants affecting as a hole performance of nan antenna fairly [11]. Therefore, keeping these modifications in view, patch of the proposed antennas is slotted properly in S-shape , which have offered an appreciable increase in band width over more than >400 MHz. Inset line feed circular patch antenna with S-shaped slot consist of S-slotted circula patch, supported on a grounded dielectric FR-4 sheet of thickness h=1.6mm and dielectric constant 4.3 [13].The main purpose and object of this paper is tocompare and analyze of band width (WB) characteristics properties under -10 dB return loss at resonant frequencies 8.9GHz and others characteristics such as voltage standing wave ratio (VSWR), directivity, gain , efficiency etc. of the proposed antennas which have been incorporated into two quietly different shapes of S-slot and without slot.
comparative study between un slotted and S-slotted inset line feed circular micro strip patch antenna .The unslotted circular patch antenna resonated at 9.7 GHz with return loss-10.08dB but S-slotted antenna exhibited resonance at 8.9GHz frequency with return loss11.123dB, covering C-Band and X-Band. The design and simulation process has been carried out through C.S.T. Microwave Studio. The characteristic properties of antenna such as bandwidth, return loss, VSWR have been investigated, analyzed and compared for both Key Words: Un- slotted circular micro strip patch antenna, S-slotted circular micro strip patch antenna, CST
1. INTRODUCTION An antenna is the basic and key element of all kinds of the wireless networking and communication. According to the IEEE standard, “Antenna is assumed as a device of transmission and reception of radio waves” [2]. Recently, the evolution in the wireless system leads to a lot of innovations in the microstrip patch antenna.Microstrip patch antenna technologyhas achieved its quick development in the late 1970s. By the early1980s fundamental microstrip antenna component were fairly well established in terms of design and modeling. The microstrip patch antenna has more advantages over other microwave antennas in the area of portability because of its low profile, low cost fabrication, light weight, easy to install and integrate with feeding networks. Due to simplicity and compatibility microstrip patch antennas are being used at lage scale in various microwave frequency spectrum to serve commercial and technological purposes [2-5]. But with these fetures and quantum merits patch antennas faces some drawbacks like narrow band width (NBD), low efficiency and low gain [2-4]. Therefore these antennas have very narrow band width characteristics as it limits the frequency range over which the antenna can perform [2].However ,the bandwidth and the size of an antenna are eciprocal and self-contradictory properties, that is in ,improvement of one of the characteristics normally results in degradation of the other.
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1.1 ANTENNA GEOMETRY AND DESIGN: For line feed circular micro strip patch antenna, the height of substrate FR-4 is 1.6mm and relative permittivity εr is4.3. The inner and outer radii of patch are ri=0. 0mm and ro = 8.0mm .The length and width of substrate FR-4 are L=58.32mm and W= 75.2mm.respectively.Perspective views of the proposed antennas are shown in fig-1
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