International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
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Design of CPW-Fed Triangular Shaped UWB Antenna for Multiband Applications Bikram Bhandari1, Amit Kumar2, Basant Paudyal3, Tejraj Giri4,Dharti Raj Shah5 M.Tech Student, Dept. of ECE, Subharti Institute of Technology & Engineering, Meerut, India 2Asst. Prof., Dept. of ECE, Subharti Institute of Technology & Engineering, Meerut, India 5Asst. Prof., Dept. of ECE, KNGD Modi Engineering College, Modinagar, India ---------------------------------------------------------------------***--------------------------------------------------------------------1,3,4
Abstract - — In this paper, a novel compact CPW-fed ultra-
researcher have given their research interest in designing and implementation of various type of antenna for UWB applications. The UWB antenna has a numbers of merits as low power consumption, high data rate, omnidirectional with maximum accuracy. For communication applications, the FCC provides -41.3dBm/MHz as an effective isotropic spectral power density for UWB bandwidth system [2] The CPW-fed antennas have received considerable attention due to good radiation properties and easy integration with system circuits.
wideband (UWB) antenna is designed. The antenna is designed on a single-layer copper-cladding substrate. The substrate material is FR4-epoxy with relative permittivity of 4.4, and the antenna has a compact dimension of 24 mm × 32.4 mm × 1.6 mm. The antenna design consists of a triangular shaped patch antenna with single folded capacitive loaded line resonator (CLLR), two rectangular ground on the same plane and fed by standard feed line of 50 Ω microstrip. This paper proposes a new triangular shaped CPW-fed UWB antenna that the bandwidth, covers 1.7 – 10.8 GHz frequency range and resonance at three different frequencies such at 2.9 GHz, 5.6 GHz and 8.4 GHz respectively. The proposed designed antenna is successfully simulated with the help of Ansoft HFSS simulator tool which is working on the principle of FEM. The results obtained from the simulation indicate that the designed antenna attains a good bandwidth from 1.7 GHz – 10.8 GHz with VSWR < 2, return loss < -10 dB. This shows that the antenna has omnidirectional radiation patterns and good gain flatness that is suitable for UWB applications.
The design of UWB antenna also face some challenges including the ultra-wideband performances of the impedance matching and radiation stability, the compact antenna size and the low manufacturing cost for consumer electronics applications, electromagnetic interference (EMI) for the entire UWB frequency band 3.1 – 10.6 GHz [3]. In past many researcher reported different CPW-fed antenna designs [4-7]. The miniaturization technique provides to decrease in the resonant frequency, therefore a large number of small planar antenna have been designed [8-10]. In CPW-fed UWB microstrip patch antenna, it consists of radiating patch on the upper side of antenna called dielectric substrate whereas ground is designed on the same plane of antenna. Similarly variety of antenna structures for planar wideband monopole antennas have been designed and studied and reported for UWB applications [11-13]. Recently, several broadband monopole configurations, such as circular, square, elliptical, half disc, pentagonal and hexagonal, have been proposed for UWB applications [1418]. A novel design of printed circular disc monopole fed by micro strip line is proposed and investigated [19]. A more specific definition for an Ultra Wide Band (UWB) antenna is a non-resonant low-Q radiator whose input impedance remains constant over a wide-band operating frequency [20], this type of antenna requires a well matched transition to space to avoid energy reflection [21].
Key Words: CPW, Ultra-wideband (UWB), CLLR, Resonant frequency, Return loss, VSWR, HFSS, FEM
I.INTRODUCTION In 2002, the Federal Communications Commission (FCC) announces the frequency bandwidth of ultra wideband (UWB) system for commercial communication applications [1]. UWB technology and its potential applications in wireless communications systems have been attracting increasing interests from both academia and industry. The antenna is an important component which determines the performance of UWB systems, one of principal subjects in UWB device is to design a compact antenna. Ultra-wideband (UWB) technology is one of the most promising solutions for future communication systems due to its high-speed data rate and excellent immunity to multi-path interference. Traditional Ultra-wideband (UWB) antennas have been unable to combine with the modern integrated system for their complex structures and large volumes, miniaturized ultra-wideband printed antennas being good candidates for their low profile. Due to the very large frequency spectrum of UWB from 3.1 – 10.6 GHz, very fast development in wireless communication system and a very large number of
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In this paper, a simple and compact CPW-fed antenna is proposed for UWB and multiband applications. The design consists of a triangular shaped patch antenna which is attached with an inverted L-shaped strip. Rectangular grounds are also designed on the same plane of proposed antenna [22].
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