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عنوان فارسی مقاله:

آنتن منوپل سه گانه کوچک جدید با ساختار فراکتال زیگ زاگ


عنوان انگلیسی مقاله:

A novel small triple-band monopole antenna with crinkle fractal-structure


سال انتشار : 2016



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مقدمه انگلیسی مقاله:

1. Introduction

Recently, the need for the design of an antenna with multiband operation has increased. The engineering new challenges in wireless communication systems include small-size, easy fabrication, low–cost, light weight, high-performance, and wide bandwidth antenna. Microstrip monopole antenna has wide impedance bandwidth, small size, light weight and it is good candidate for multiband operations [1–4]. The multiband antennas have main role for wireless local area network (WLAN: 2.4–2.484, 5.15–5.35 and 5.725–5.85 GHz) and worldwide interoperability for microwave access (WiMAX: 2.5–2.69, 3.4–3.69 and 5.25– 5.85 GHz) applications. The speedy growth in wireless communication systems, caused multiband antenna more stand beloved [5,6]. A compact antenna with a straight coupled-fed microstrip line, U-shaped slot for multi-band applications is presented. This antenna has good radiation and gain characteristics, and can cover Digital Communication System [7]. In [8], a penta-band antenna for mobile phone applications is presented. The antenna has two modified inverted-L patch and short grounded transmission line for impedance matching. There have been different antennas for DCS application [1–4,7–10]. A compact coplanar waveguide (CPW)-fed antenna for WLAN/WiMAX applications is presented. The radiation patch is fed by transmission line and with using parasitic strip on the back plane of the substrate, tri-band resonances are generated [11]. In [12], a novel monopole antenna by microstrip-fed for WLAN/WiMAX applications is presented. The proposed antenna consists of one branch strip, two hookshaped strips and a rectangular slot in the ground plane. A novel dipole antenna with multiband operation for WLAN/WiMAX applications is presented. The antenna consists of several symmetrical branch strips and modified rectangular ground plane, a modified rectangular plane is act as a reflector for directive gain [13]. In [17], the antenna consists of L-shaped slits and an inverted L-shaped slot in the radiating patch for WLAN/WiMAX applications is presented. There has been different antenna for WLAN/WiMAX applications [5–6,11–21]. In [18], a coplanar waveguide-fed (CPW) antenna includes a square spiral patch to increase resonance frequencies and two L-shaped strips for achieving wider impedance bandwidth. The antenna can cover 2.4/5.2/5.8 GHz WLAN and 3.5/5.5 GHz WiMAX bands. In [19], a microstrip antenna consists of two square spiral arms presented. The antenna by using square spirals, can achieve multiband operation for WLAN/WiMAX applications. In this essay a novel monopole antenna with crinkle fractalstructure for DCS/WiMAX and WLAN applications has been reported. The antenna include of crinkle fractal radiating structure, which this crinkles achieve by parametric simulations. By adding crinkle fractal the number of resonance frequencies are increased. The proposed antenna has wide impedance bandwidth. The antenna has a easy structure and small size, the measured results show impedance bandwidths of 189 MHz (1.691–1.880 GHz), 212 MHz (3.412–3.624 GHz), 302 MHz (5.139–5.441 GHz), to cover the DCS or GSM1800: 1.795 GHz, worldwide interoperability for microwave access (WiMAX: 3.5 GHz), wireless local area network (WLAN: 5.2 GHz), and good radiation characteristics for the operating bands.



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کلمات کلیدی:

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