DESIGN OF CPW FED ANTENNA FOR WIMAX APPLICATIONS

Transcription

1 Volume 114 No , ISSN: (printed version); ISSN: (on-line version) url: ijpam.eu DESIGN OF CPW FED ANTENNA FOR WIMAX APPLICATIONS R.Sanmugasundaram 1, D.Dileepan 2, V.Balavignesh 3, K.Kalaiarasan 4 Vel Tech Dr.RR & Dr. SR University, Chennai, India rsanmu88@gmail.com, 2 dileepand88@gmail.com, 3 balavignesh01@gmail.com, 4 kalaiarasank9@gmail.com Abstract In this paper,the proposed CPW fed antenna is invoke the dual band applications in the frequency 5.8GHz.The proposed antenna designed by using FR4 substrate having dielectric constant of 2.4 and loss tangent is with mentor graphics IE3D.The proposed antenna having maximum gain of 4dBi for 5.8 GHz respectively. The proposed antenna satisfies the wider bandwidth, lower return loss, high gain, good efficiency and better impedance matching. Keywords: CPW,Wimax INTRODUCTION In wireless communication applications, WIMAX technologies to provide high speed internet and network connections with in the countries. WIMAX make it suitable for portable mobile connectivity across cities and countries [1]. Dual band CPW fed antenna for 5.8 GHz for wireless applications. In wireless system, users are increased; the performance is decreased because of single sector. So we can overcome the above problem by WIMAX technologies. Wi-Max contains several advantages like easy installation, wide coverage than Wi-Fi and easy extension to suburban and rural areas. So the proposed antenna well suitable for WIMAX applications [2] [4]. The CPW fed antennas are used multilevel purpose. Due to this reason, these antennas are very compact. They can be used in multiband or wideband [5]. They are widely used in cellular based telephony and 689

2 microwave applications. They are immensely used for wireless applications as they as small in size, with less weight and low cost. For these reasons, the type of onboard antennas for small spacecraft should be investigated very carefully [6]. The proposed antenna having the dimension of 46mm mm 42mm and antenna structure are simpleto design with Mentor graphics IE3D. Measured and simulated results exhibit 5.8 GHz WiMAX bands, and show the maximum gain of 4dBi. The antenna shows omnidirectional radiation pattern performance in the H-plane [3]. We have compare with microstrip antenna, coplanar wave guide are mostly preferred for wireless applications because it has low dispersion, lower radiation and wider band width. In CPW antenna bandwidth vary due to change of antenna slot width. The good feed structure and wider bandwidth gives better impedance matching. The antenna includes resonant structures, parasite elements, modifying the shape of the radiator, slots, adding slots on the ground plane, modifying the shapes of the ground planes. ANTENNA GEOMETRY Fig.1 Geometry of proposed Antenna 690

3 Table 1: Parameters of the proposed antenna W1 W2 W3 W4 W5 W6 W7 L1 L2 L3 L The details of the proposed antenna Geometry are presented. The antenna working at 5.8GHz for wimax applications..the size of the antenna is 46mmx42mm. CPW is a type of electrical transmission line and which having less dispersion,low conduction loss, low return lossless coupling between adjacent components.it provides easy impedance matching with CPW line. The antenna length and width are 46mmx42mm and it fed using a coplanar wave guide.fr4 means flame retardant and it indicates safety of flammability. Dry and humid conditions of the material to retain its high mechanical values and electrical insulation properties. The proposed antenna has dielectric constant 2.4,thickness 1.5 and simulated on FR4 substrate.this antenna consists of double E shaped radiator with 50ohm impedance matching.in our antenna consist of two ground planes with same width and length are located symmetrically on each side of CPW.The gap between ground plane and CPW fed line is 1mm and feeding width 2mm.The measured results are obtained by using mentor graphics IE3D. 691

4 RESULTS AND DISCUSSION Fig.2 Return loss of proposed Antenna Antenna performance was studied by simulation with IE3D software. Simulated and measured return loss value shows in Fig.2.The proposed antenna returns loss of -28dB at 5.8GHz frequency shows poor return loss value. It is a reasonably accurate simulation result shows that the resonant frequency and the bandwidth of the antenna is perfectly clear. The VSWR describes how much power reflected from the antenna. This value is very low, Its indicates maximum power deliverd to the antenna The proposed antenna shows VSWR at 5.8GHz. 692

5 Fig.3: VSWR of proposed Antenna The radiation system (proposed antenna h- e aircraft and aircraft) showing the directivity of the antenna is designed for 5.8GHz frequency. The proposed antenna pattern E plane and H plane pattern shows 4dBi gain. The whole frequency band of the antenna radiation efficiency suitable. Radiation patterns often show high directivity. The proposed antenna resonates at frequency bands such as 5.8GHz.compare with previous results, the first resonance frequency shifted towards lower frquency side and second frequency is shifted towards higher frequency side. so this results shows bandwidth improvement. 693

6 Fig.4 Elevation patternof proposed Antenna Fig.5 Azimuth pattern of proposed Antenna Fig.8 shows simulated antenna gain against resonant frequencies (5.8GHz). The simulated gain of the proposed antenna shows 4dBi for 5.8GHz respectively. The proposed antenna shows both antenna efficiency and radiation efficiency can be observed from the Fig.6 (around 40% & 50%). 694

7 Fig.6 Gain of proposed Antenna Fig.7 Current Distribution of proposed Antenna The above figure shows the current distribution of our antenna.green color shows maximum current distribution. 695

8 CONCLUSION A compact coplanar waveguide fed antenna is designed and the results are discussed for wimax applications. The proposed antenna is operating the frequency range of 5.8 GHz. Simulated results are satisfying the WIMAX and applications. The observed radiation patterns are stable within the frequency band and it shows maximum gain of 4 dbi. The proposed design antenna provides cost effective, flexible, easy fabrication and reliable. References 1. S. Ashok Kumar; R. Sanmuga Sundaram; T. Shanmuganantham "CPW- fed small metamaterial inspired antenna for WiMax and WLAN applications, IEEE Indian Antenna Week (IAW 2016) Pages: Kai Yu; Yingsong Li; Xianping LuoA CPW-fed quad-band monopole antenna for L-band, WLAN and WiMAX communication applications2016 Progress in Electromagnetic Research Symposium (PIERS) Pages: Manisha Gupta; Vinita MathurKoch fractal antenna using right angled isosceles triangular microstrip patch antenna structure for WiMAX2015 Communication, Control and Intelligent Systems (CCIS), Pages: Kai Yu; Yingsong Li; Xianping Luo A CPW-fed quad-band monopole antenna for L-band, WLAN and WiMAX communication applications Pages: ,

9 5. S. Ashok Kumar; T. ShanmugananthamImplantable CPW fed monopole antennas for 2.45 GHz ISM band applications IEEE Applied Electromagnetics Conference (AEMC), Pages: Naveen Mishra; Ashish Gupta Compact CPW-fed ZOR antenna for WiMAX applications Volume: 15, Pages: 1-2, Mohammad Fakharian; Pejman Rezaei; Ali Orouji Reconfigurable Multiband Extended U-Slot Antenna with Switchable Polarization for Wireless Applications Volume: 57, Pages: , Year: Manisha Gupta; Vinita Mathur Koch fractal antenna using right angled isosceles triangular microstrip patch antenna structure for WiMAX, Pages: 49-52, Rui-Zhi Wu; Peng Wang; Qiang Zheng; Rui-Peng Li Compact CPWfed triple-band antenna for diversity applications Volume: 51, Pages: , S. Ashok Kumar; T. Shanmuganantham; J. Navin Sankar; Anandha Saravanan Design of implantable CPW fed l-slot antenna for biomedical applications, Tafgen- 2015, Pages:

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