scholarly journals Miniature Slotted Semi-Circular Dual-Band Antenna for WiMAX and WLAN Applications

2020 ◽  
Vol 20 (2) ◽  
pp. 115-124
Author(s):  
Dhirgham Kamal Naji
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Order Mode ◽  
Circular Patch ◽  
Area Reduction ◽  
Antenna Miniaturization ◽  
Dual Band Antenna ◽  
Simple Geometry

In this paper, a new approach is presented for designing a miniaturized microstrip patch antenna (MPA) for dual-band applications. The proposed MPA consists of a semi-circular patch radiator fed by a 50-Ω coplanar waveguide (CPW) structure with a tapered-ground plane for enhancing impedance bandwidth over the dual-band. By inserting a folded U-shaped slot into the semi-circular patch, the proposed antenna introduces an additional higher-order mode but does not modify the resonance frequency of the lower-order mode of the patch, yielding the desired dual-band response. For antenna miniaturization, the circular-shaped radiator of the reference antenna (RA) was converted into a semi-circular radiating patch. Agreement between CST and HFSS simulated results led us to manufacture a prototype of the designed antenna on one side of an inexpensive FR-4 substrate with an overall dimension of 17 × 18 × 0.8 mm<sup>3</sup>. The measured result in terms of reflection coefficient S11 confirms that the antenna operates in both 3.5 GHz (3.4–3.7 GHz) and 5.8 GHz (5.725–5.875 GHz) bands suitable for use in WiMAX and WLAN applications, respectively. Moreover, besides an area reduction of 32% compared with the RA counterpart, the proposed antenna has other features, a simple geometry, and is easy to manufacture in comparison with previously reported antenna structures.

scholarly journals Coplanar Waveguide Fed Compact Wide Circular-Slotted Antenna for Wi-Fi/WiMAX Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
M. Samsuzzaman ◽  
T. Islam ◽  
N. H. Abd Rahman ◽  
M. R. I. Faruque ◽  
J. S. Mandeep
Keyword(s):  
Coplanar Waveguide ◽  
Matching Condition ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Reflection Coefficients ◽  
Rectangular Patch ◽  
Dual Band Antenna ◽  
Lower Band ◽  
Slotted Antenna ◽  
Peak Gain

A coplanar waveguide (CPW) fed printing and wide circular slotted, dual band antenna for Wi-Fi/WiMAX applications are presented. The antenna mainly encompasses a ground with a wide circular slot in the centre, a rectangular feeding strip, and two pairs of symmetric planar invertedL(SPIL) strips connecting with the slotted ground. The tuning effects of the rectangular patch, ground size, and SPIL strips to the resonance and matching condition are examined by HFSS and the prototype is fabricated and measured. The simulation and experimental results show that the antenna has an impedance bandwidth with −10 dB reflection coefficients 600 MHz (3.26–3.86 GHz, lower band) and 1040 MHz (5.02–6.26 GHz, upper band), which can cover both the Wi-Fi 5.2/5.5/5.8 GHz and WiMAX 3.3/3.5/3.7/5.8 GHz bands. Moreover, a stable omnidirectional radiation pattern and average peak gain for lower band 3.23 dB and upper band 5.93 dB have been achieved, respectively.

scholarly journals Bandwidth Enhancement Technique of the Meandered Monopole Antenna

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Chien-Jen Wang ◽  
Dai-Heng Hsieh
Keyword(s):  
Communication Systems ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Matching Condition ◽  
Resonant Mode ◽  
Monopole Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Feeding Structure

A small dual-band monopole antenna with coplanar waveguide (CPW) feeding structure is presented in this paper. The antenna is composed of a meandered monopole, an extended conductor tail, and an asymmetrical ground plane. Tuning geometrical structure of the ground plane excites an additional resonant frequency band and thus enhances the impedance bandwidth of the meandered monopole antenna. Unlike the conventional monopole antenna, the new resonant mode is excited by a slot trace of the CPW transmission line. The radiation performance of the slot mode is as similar as that of the monopole. The parametrical effect of the size of the one-side ground plane on impedance matching condition has been derived by the simulation. The measured impedance bandwidths, which are defined by the reflection coefficient of −6 dB, are 186 MHz (863–1049 MHz, 19.4%) at the lower resonant band and 1320 MHz (1490–2810 MHz, 61.3%) at the upper band. From the results of the reflection coefficients of the proposed monopole antenna, the operated bandwidths of the commercial wireless communication systems, such as GSM 900, DCS, IMT-2000, UMTS, WLAN, LTE 2300, and LTE 2500, are covered for uses.

scholarly journals Dual Band Slotted Printed Circular Patch Antenna With Superstrate and EBG Structure for 5G Applications

2019 ◽  
Vol 38 (1) ◽  
pp. 227-238 ◽  
Author(s):  
Bismah Hasan ◽  
Kamran Raza
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Radiation Characteristics ◽  
Circular Patch ◽  
Feed Line ◽  
Circular Patch Antenna ◽  
Power Radiation

Slotted circular printed layered patch antenna is designed, simulated and fabricated for 5G (Fifth Generation) wireless communication applications. The antenna consists of slots in the main radiating circular patch element for miniaturizing the size of the radiating element and providing dual band radiation characteristics. The feed line is separated on bottom substrate layer with EBG (Electromagnetic Band-Gap) embedded for enhancing the gain characteristics of the antenna. Superstrate layer is also used for improving the gain of the antenna where the distance from the radiating antenna element is optimized for maximizing the impedance bandwidth and radiation characteristics. The feed realization and impedance matching of the radiating slotted circular patch antenna is done by inducing slot at the middle ground plane of the slot embedded circular patch antenna system. The proposed configuration provides power radiation gain values of more than 5 dB for the Ka band of communications, whereas the impedance bandwidth of the antenna is verified for the dual resonances at 27.5 and 28.5 GHz. Dual band radiation characteristics are attained by embedding and optimizing the slot length and width in the circular patch radiator element that is placed on the upper face of the substrate RT Rogers Duroid 5880 layer. The length of the microstrip feed line embedded in the lower layer of the substrate is optimized for providing required bandwidth characteristics for the dual frequency point radiations. The antenna configuration is designed, modeled and simulated in CST (Central Standard Time) Microwave studio. The antenna is fabricated and measured vs simulated frequency response, gain patterns and current density plots are presented for the verification of antenna operation in the desired frequency bands.

A hybrid integrated ultra-wideband/dual-band antenna with high isolation

2015 ◽  
Vol 8 (2) ◽  
pp. 341-346 ◽  
Author(s):  
Idris Messaoudene ◽  
Tayeb A. Denidni ◽  
Abdelmadjid Benghalia
Keyword(s):  
Dielectric Resonator ◽  
Mutual Coupling ◽  
Coplanar Waveguide ◽  
Ultra Wideband ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
High Isolation ◽  
Dual Band Antenna ◽  
Good Agreement

In this paper, we propose a novel integrated ultra-wideband (UWB) monopole antenna with dual-band antenna. The antenna consists of planar rectangular with semi-elliptical base and a rectangular dielectric resonator antenna (DRA) with dual-band operation. Both of them are excited via coplanar waveguide (CPW) lines. The experimental measurements show that the planar monopole provides an impedance bandwidth between 2.44 and 11.9 GHz which largely covers the entire UWB spectrum, and the rectangular DRA operates at two bands; 5.3–6.2 and 8.5–9.4 GHz. Additionally, the proposed structure ensures low mutual coupling between the two ports (with S21 less than −20 dB in the whole operating frequency band). The measured and numerical results show a good agreement.

Coplanar waveguide fed compact dual-band antenna with capacitive shorting between signal strip and ground plane

2020 ◽  
Vol 127 ◽  
pp. 153448
Author(s):  
Vivek Rajan ◽  
Vinesh Puthiyapurayil Viswanathan ◽  
Vinisha Chaluvayalil ◽  
Mohanan Pezholil ◽  
Vasudevan Kesavath
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Dual Band ◽  
Dual Band Antenna

scholarly journals A Low Profile Dual-Band High Gain Directional Antenna for Anti-Interference WLAN Station Applications

2021 ◽  
Vol 11 (5) ◽  
pp. 2007
Author(s):  
Yuqing Dou ◽  
Guiting Dong ◽  
Jiafu Lin ◽  
Qibo Cai ◽  
Gui Liu
Keyword(s):  
Frequency Band ◽  
Local Area Network ◽  
Ground Plane ◽  
Directional Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Directional Radiation ◽  
Dual Band Antenna ◽  
Low Profile

This paper presents a low-profile dual-band antenna with directional radiation characteristics for wireless local area network (WLAN) applications. The proposed directional antenna is composed of a coupling microstrip line, two F-shaped strips, two rectangular strips, and a defected ground plane. The measured impedance bandwidth of the proposed antenna is 180 MHz (2.33–2.51 GHz) and 830 MHz (5.09–5.92 GHz), which can cover Institute of Electrical and Electronic Engineers (IEEE) 802.11 a/b/g frequency bands. The dual-band antenna exhibits a desirable directional radiation patterns in the vertical and horizontal planes with the peak gain of 6.55 dBi in the lower frequency band and 8.1 dBi in the higher frequency band. The measured antenna efficiency is 70% at 2.4 GHz and 84.5% at 5.5 GHz. The proposed dual-band WLAN station antenna is designed on a FR4 substrate with overall dimensions of 69 mm × 50 mm × 1.6 mm.

scholarly journals Extended Bandwidth Microstrip Circular Patch Antenna for Dual Band Applications

2018 ◽  
Vol 8 (2) ◽  
pp. 1056
Author(s):  
A. H. Majeed ◽  
K. H. Sayidmarie
Keyword(s):  
Patch Antenna ◽  
Communication Systems ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Bandwidth Extension ◽  
Coupled Line ◽  
Circular Patch ◽  
Dual Band Antenna ◽  
Relative Bandwidth ◽  
Circular Patch Antenna

<p>This paper presents a new wideband microstrip circular patch antenna (MCPA) fed by proximity-coupled line with double-stub matching to achieve dual-band operation. Bandwidth extension is achieved by exciting higher-order modes in the circular radiating patch, and using two stubs to achieve adequate matching across the obtained two bands. The characteristics of the antenna such as reflection coefficient, impedance bandwidth, gain and radiation pattern are investigated and optimized through parametric studies using the CST Microwave Studio Suite. The antenna achieved a large relative bandwidth of 45.16% at the upper band, while the lower one has 10.3% relative bandwidth. The maximum achieved gain of the dual-band antenna in the 5.8GHz band is 4.62dBi while it is 4.85dBi in the upper band. The antenna has an overall size of 30×30×3.2mm3 corresponding to 0.58λ × 0.58 λ × 0.062 λ at the lower band of 5.8 GHz. The proposed antenna should be useful for WLAN and X-band communication systems.</p>

scholarly journals A Compact Metamaterial based Dual-Band Antenna with Improved Gain for WLAN Applications

2021 ◽  
Vol 9 (VI) ◽  
pp. 2778-2783
Author(s):  
Pendli Pradeep
Keyword(s):  
Ground Plane ◽  
Cost Effective ◽  
Split Ring Resonator ◽  
Dual Band ◽  
Electromagnetic Properties ◽  
Impedance Bandwidth ◽  
Compact Antenna ◽  
Resonator Structure ◽  
Dual Band Antenna ◽  
Compact Size

In this paper, a compact metamaterial inspired dual band antenna is proposed for WLAN and WiMAX applications. The antenna consists of Square Split Ring Resonator structure with a defected ground plane and slots to enhance the bandwidth and gain parameters. Metamaterial based Microstrip patch antenna produces unique electromagnetic properties that allows us to control over the antenna parameters with a compact size. FR-4 epoxy is used as substrate its dielectric constant is 4.4 and loss tangent is 0.02. Dimensions of the antenna are 20 x 12 x 1.6mm3 with very compact size and cost effective. The proposed metamaterial based antenna resonates at dual bands at 5.13GHz and 5.53 GHz with impedance bandwidth of (|S11|<-10 dB) 4.96-5.26 GHz (300MHz) and 5.34-5.69 GHz (350MHz) respectively. The peak gains at resonant frequencies 5.13 GHz and 5.53 GHz are 1.61 dB and 1.62dB respectively. The proposed metamaterial based compact antenna can effectively work for WLAN and WiMAX application.

scholarly journals Design of Dual-Band and Low-Profile SIW Cavity-Backed Slot Antenna for 5G Applications

2021 ◽  
Author(s):  
Amit Kumar ◽  
Amit Kumar Singh
Keyword(s):  
Ground Plane ◽  
Effective Length ◽  
Dual Band ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Radiation Characteristics ◽  
Antenna Performance ◽  
Dual Band Antenna ◽  
Low Profile ◽  
Via Hole

In this communication, the design of a dual-band and low-profile SIW cavity-backed slot antenna operating at K-band and Ka-band has been proposed to expand the Impedance bandwidth (IBW) of the antenna. The dual-band antenna consists of the SIW cavity with two parallel slots etched on the conductor’s ground plane. To obtain a dual-band, higher-order hybrid modes are tuned and combined to form the second band of the proposed antenna with a broader bandwidth. For dual-band antenna, fractional bandwidth of 5.26% and 6.15% are attained with the maximum gain of 5.45 dBi and 6.15 dBi at 24.7 GHz and 27.8 GHz, respectively. A cavity-backed antenna using via-hole and the slot has been proposed to improve an IBW and other antenna performance parameters. Via-hole establishes a connection between the top and bottom surfaces of the cavity, creating a new path for the current to flow by shortening the slot’s effective length. An IBW of 4.2 GHz (15.32%), where a gain of 7.8 dBi and 9.2 dBi have been realized at 25.9 GHz and 28.8 GHz, respectively. Isolation of less than 25 dB has been achieved through simulation. In terms of λ0, the overall volumetric dimension of the proposed antenna is 1.68 λ0×1.31λ0×0.04λ0. The proposed design demonstrates better performance in terms of antenna parameters, including compactness, good radiation characteristics, enhanced impedance bandwidth, and higher gain than the latest state of the art.

scholarly journals A Dual-Band Modified Franklin mm-Wave Antenna for 5G Wireless Applications

2021 ◽  
Vol 11 (2) ◽  
pp. 693
Author(s):  
Arjun Surendran ◽  
Aravind B ◽  
Tanweer Ali ◽  
Om Prakash Kumar ◽  
Pradeep Kumar ◽  
...  
Keyword(s):  
Ground Plane ◽  
High Gain ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Patch Antennas ◽  
Fractional Bandwidth ◽  
Wireless Applications ◽  
Fifth Generation ◽  
Simple Geometry ◽  
Compact Size

Franklin array antennas are considered as one of the most competitive candidates for millimeter-wave (mmW) 5G applications due to their compact size, simple geometry and high gain. This paper describes a microstrip Franklin antenna array for fifth generation (5G) wireless applications. The proposed modified Franklin array is based on a collinear array structure with the objective of achieving broad bandwidth, high directivity, and dual-band operation at 22.7 and 34.9 GHz. The designed antenna consists of a 3 × 3 array patch element as the radiating part and a 3 × 3 slotted ground plane operating at a multiband resonance in the mmW range. The dimensions of the patch antennas are designed based on λ/2 of the second resonant frequency. The designed antenna shows dual band operation with a total impedance bandwidth ranging from 21.5 to 24.3 GHz (fractional bandwidth of 12.2%) at the first band and from 33.9 to 36 GHz (fractional bandwidth of 6%) at the second band in simulation. In measurement, the impedance bandwidth ranges from 21.5 to 24.5 GHz (fractional bandwidth of 13%) at the first band and from 34.3 to 36.2 GHz (fractional bandwidth of 5.3%) at the second band, respectively. The performance of the antenna is analyzed by parametric analysis by modifying various parameters of the antenna. All the necessary simulations are carried out using HFSS v.14.0.

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