A Compact Multiband Antenna loaded with Etype unit cell DGS structure and H-shaped slot for WiMAX/WLAN Applications
01 Sep 2018-pp 36-40
TL;DR: In this article, the authors proposed a triple-band E-type unit cell DGS structure for WiMAX/WLAN applications, where each unit cell independently controls a set of bands (i.e., 2.5-2.64 GHz, 3.53-3.74 GHz, and 5.8-5.735 GHz).
Abstract: A compact (0.15 λ l ×0.15 λ l ×0.01λ l ) triple band antenna for WiMAX/ WLAN application is proposed. Compactness and multiband operation is accomplished by utilizing E-type unit cell Defected Ground Structure (DGS) in conjunction with H-shaped slot. The main advantages of the proposed E-type unit cell DGS structure is that each unit cell independently control a set of bands (i.e. Upper E-type unit cell DGS structure controls 2.56 and 3.64 GHz, while lower E-type unit cell controls the band at 5.8GHz). The antenna shows the resonance at 2.56 (lower WiMAX), 3.64 (middle WiMAX) and 5.8 (WLAN) with fractional bandwidth of about 5.44 % (2.5-2.64 GHz), 5.77% (3.53-3.74 GHz) and 1.5% (5.735.82 GHz). Good pattern and impedance matching is obtained at the targeted frequencies.
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TL;DR: In this paper, the design of a four-band slot antenna for the global positioning system (GPS), worldwide interoperability for microwave access (WiMAX), and wireless area network (WLAN) is presented.
Abstract: The design of a four-band slot antenna for the global positioning system (GPS), worldwide interoperability for microwave access (WiMAX), and wireless area network (WLAN) is presented. The antenna consists of a rectangular slot with an area of ${\mathbf{0}}.{\mathbf{37}}{\lambda _g} \times {\mathbf{0}}.{\mathbf{14}}{\lambda _g} = {\mathbf{48}} \times {\mathbf{18}}\;{\bf m}{{\bf m}^{\mathbf{2}}}$ (where ${\lambda _g}$ is the guide wavelength), a $T$ -shaped feed patch, an inverted $T$ -shaped stub, and two $E$ -shaped stubs to generate four frequency bands. The radiating portion and total size of the antenna are less than those of the tri-band antennas studied in literature. Parametric study on the parameters for setting the four frequency bands is presented and hence the methodology of using the design for other frequency bands is proposed. The multiband slot antenna is studied and designed using computer simulation. For verification of simulation results, the antenna is fabricated and measured. The simulated and measured return losses, radiation patterns, realized peak gains, and efficiencies of the antenna are presented. Measured results show that the antenna can be designed to cover the frequency bands from 1.575 to 1.665 GHz for the GPS system, 2.4–2.545 GHz for the IEEE 802.11b&g WLAN systems, 3.27–3.97 GHz for the WiMAX system, and 5.17–5.93 GHz for the IEEE 802.11a WLAN system. The effects of the feeding cable used in measurement and of the cover are also investigated.
224 citations
"A Compact Multiband Antenna loaded ..." refers background in this paper
...Recently miniaturized multiband antennas has gained significant attention in the field of antenna design to meet the need of modern wireless communication system because of its favourable properties like simple design, ease of integration with circuit, miniaturized size, simultaneous operation at different bands, acceptable trade off between gain, radiation efficiency and bandwidth [1-3] etc....
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Abstract: A simple multiband metamaterial-loaded monopole antenna suitable for wireless local area network (WLAN) and Worldwide Interoperability for Microwave Access (WiMAX) applications is proposed in this letter. The rectangle monopole of the proposed antenna is originally designed to resonate at around 5.2 GHz. When the inverted-L slot is etched, the antenna produces a second resonance at around 4.1 GHz. Then, with the addition of the metamaterial reactive loading, the resonant frequency of the antenna will be shifted down, and a third resonance covering the 2.4-GHz band occurs. Consequently, the antenna can cover the 2.4/5.2/5.8-GHz WLAN and 2.5/3.5/5.5-GHz WiMAX bands with a very compact size of only $12.9 \times 6.5~\hbox{mm}^2$ . Monopole-like radiation patterns and acceptable gains and efficiencies have been obtained. Details of the antenna design as well as the experimental results are presented and discussed.
129 citations
"A Compact Multiband Antenna loaded ..." refers background in this paper
...In regard to this literature reports a number of methods to obtain multiband operation in antenna like use of different, parasitic elements [4-6], using meander shaped radiator [7] etching slots in radiator and ground plane [8-13], metamaterials [14-17], fractals [18-20] etc....
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TL;DR: In this article, a novel miniaturized five band metamaterial inspired slot antenna is reported, which consists of a ring monopole and metamural Rectangular Complementary Split Ring Resonator (RCSRR) as the radiating part, two L and one T-shaped slot as the ground plane, respectively.
Abstract: A novel miniaturized five band metamaterial inspired slot antenna is reported. The proposed design consists of a ring monopole and metamaterial Rectangular Complementary Split Ring Resonator (RCSRR) as the radiating part, two L and one T–shaped slot as the ground plane, respectively. Miniaturization in the proposed design is accomplished by metamaterial RCSRR, and also, it helps the antenna to operate at 2.9 and 5.2 GHz frequency bands. The aforementioned miniaturization process leads to about 46.8% reduction in volume of the proposed design, as compared to the conventional antenna. The pass band characteristics of the metamaterial RCSRR through waveguide medium are discussed in detail. In order to enhance the operating abilities of the miniaturized antenna, slots are etched out in the ground plane, thereby making the miniaturized antenna further operate at 2.4, 5.6 and 8.8 GHz, respectively. The proposed design has an active patch area of only , with dB bandwidth of about 4.16% (2.35–2.45 GHz), 5.71% (2.63–2.76 GHz), 10.25% (4.44–4.92 GHz), 6.25% (5.42–5.77 GHz) and 2.39% (8.68–8.89 GHz) in simulation, and about 6.86% (2.25–2.41 GHz), 5.01% (2.55–2.7 GHz), 9.16% (4.58–5.02 GHz), 5.38% (5.79–6.11 GHz) and 5.42% (8.44–8.91 GHz) in measurement. The antenna has good impedance matching, acceptable gain and stable radiation characteristics across the operational bandwidths.
84 citations
"A Compact Multiband Antenna loaded ..." refers background in this paper
...In regard to this literature reports a number of methods to obtain multiband operation in antenna like use of different, parasitic elements [4-6], using meander shaped radiator [7] etching slots in radiator and ground plane [8-13], metamaterials [14-17], fractals [18-20] etc....
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TL;DR: In this article, a novel four band frequency reconfigurable antenna for 1.6, 2.5, 5.8, and 9.8 GHz frequency bands is presented, which has a compact size of 0.18 λ 0 × 0.
Abstract: This research presents a novel four band frequency reconfigurable antenna for 1.6 (Global Navigation Satellite system (GNSS)), 2.5 (Lower Worldwide Interoperability for Microwave Access (WiMAX)), 5.8 (Wireless local area network (WLAN)) and 9.8 GHz (X-band) frequency bands. The antenna has a compact size of 0 . 18 λ 0 × 0.18 λ 0 × 0.0096 λ 0 at lower resonance of 1.8 GHz and is printed on FR4 material with height (h) = 1.6 mm, dielectric constant ( ( e r ) = 4.4 and loss tangent ( δ ) = 0.02. Multiband phenomenon in the antenna is achieved by etching trapezoidal slot in the radiating monopole and rectangular slots in the ground plane. Frequency reconfiguration in the proposed structure is achieved by placing PIN diode switch between rectangular slot placed in the ground plane. During OFF state, the antenna exhibit quad band with S11
83 citations
"A Compact Multiband Antenna loaded ..." refers background in this paper
...In regard to this literature reports a number of methods to obtain multiband operation in antenna like use of different, parasitic elements [4-6], using meander shaped radiator [7] etching slots in radiator and ground plane [8-13], metamaterials [14-17], fractals [18-20] etc....
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TL;DR: In this paper, a triple-band WLAN antenna with a planar inverted-F antenna (PIFA) in conjunction with a parasitic element is proposed, which is the most compact WLAN internal antenna covering the three frequency bands.
Abstract: A triple-band wireless local area network (WLAN) antenna has been proposed. The antenna comprises a planar inverted-F antenna (PIFA) in conjunction with a parasitic element. It has been demonstrated that triple-band WLAN operations including the IEEE 802.11 2.4 GHz (2.4-2.484 GHz), 5.2 GHz (5.15-5.35 GHz), and 5.8 GHz (5.725-5.825 GHz) can be achieved by using the proposed antenna with a very compact size, probably the most compact WLAN internal antenna covering the three frequency bands.
71 citations
"A Compact Multiband Antenna loaded ..." refers background in this paper
...In regard to this literature reports a number of methods to obtain multiband operation in antenna like use of different, parasitic elements [4-6], using meander shaped radiator [7] etching slots in radiator and ground plane [8-13], metamaterials [14-17], fractals [18-20] etc....
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