scholarly journals Reconfigurable Multi-Beam Dual-Band Antenna based on Vee Dipoles

2018 ◽  
Vol 7 (2) ◽  
pp. 19-24 ◽  
Author(s):  
L. Snehalatha ◽  
N. P. Pathak ◽  
S. K. Manhas
Keyword(s):  
The State ◽  
Dual Band ◽  
Planar Antenna ◽  
Radiation Patterns ◽  
Pin Diodes ◽  
Dual Band Antenna ◽  
Antenna Configuration ◽  
Good Agreement

This paper presents a novel antenna configuration to support reconfigurable multi-beam feature with dual-band capability. The proposed design uses four double Vee dipoles with their arms printed on either sides of a substrate and fed through a single coaxial input probe. A single directional beam that can be configured in four directions at quadrature angle in the azimuth (xy-plane) and corresponding dual, triple and quad beams have been obtained by controlling the state of four PIN diodes. A prototype of the proposed antenna has been designed and fabricated. Measured antenna parameters are in good agreement with that of simulated parameters. This highly planar antenna shows similar radiation patterns at both design frequencies enabling concurrent dual-band communication for all fifteen possible beam configurations.

Bandwidth improvement of planar antennas using a single-layer metamaterial substrate for X-band application

2020 ◽  
Vol 12 (9) ◽  
pp. 906-914
Author(s):  
O. Borazjani ◽  
M. Naser-Moghadasi ◽  
J. Rashed-Mohassel ◽  
R. A. Sadeghzadeh
Keyword(s):  
Microstrip Antenna ◽  
Single Layer ◽  
Dual Band ◽  
Planar Antennas ◽  
Radiation Characteristics ◽  
Dual Band Antenna ◽  
X Band ◽  
Field Radiation ◽  
Metallic Ring ◽  
Good Agreement

AbstractTo prevent far-field radiation characteristics degradation while increasing bandwidth, an attempt has been made to design and fabricate a microstrip antenna. An electromagnetic band gap (EBG) structure, including a layer of a metallic ring on a layer of Rogers 4003C substrate, is used. For a better design, a patch antenna with and without the EBG substrate has been simulated. The results show that the bandwidth can be improved up to 1.6 GHz in X-band by adding the EBG substrate. Furthermore, using this structure, a dual-band antenna was obtained as well. Finally, to validate the simulation results, a comparison has been done between simulation data and experimental results which demonstrate good agreement.

Compact UWB monopole antenna with reconfigurable band-notch characteristics

2019 ◽  
Vol 12 (3) ◽  
pp. 252-258 ◽  
Author(s):  
Liping Han ◽  
Jing Chen ◽  
Wenmei Zhang
Keyword(s):  
Ground Plane ◽  
Monopole Antenna ◽  
Ultra Wideband ◽  
Dual Band ◽  
Radiation Patterns ◽  
Pin Diodes ◽  
Notch Band ◽  
Rectangular Patch ◽  
Compact Size ◽  
Defected Ground Plane

AbstractA compact ultra-wideband (UWB) monopole antenna with reconfigurable band-notch characteristics is demonstrated in this paper. It is comprised of a modified rectangular patch and a defected ground plane. The band-notch property in the WiMAX and WLAN bands is achieved by etching an open-ended slot on the radiating patch and an inverted U-shaped slot on the ground plane, respectively. To obtain the reconfigurable band-notch performance, two PIN diodes are inserted in the slots, and then the notch-band can be switched by changing the states of the PIN diodes. The antenna has a compact size of 0.47 λ1 × 0.27 λ1. The simulated and measured results indicate that the antenna can operate at a UWB mode, two single band-notch modes, and a dual band-notch mode. Moreover, stable radiation patterns are obtained.

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.

scholarly journals Ultrasmall Dual-Band Metamaterial Antennas Based on Asymmetrical Hybrid Resonators

2016 ◽  
Vol 2016 ◽  
pp. 1-10
Author(s):  
Ji-Xu Zhu ◽  
Peng Bai ◽  
Jia-Fu Wang
Keyword(s):  
Communication Systems ◽  
Dual Band ◽  
Wireless Communication Systems ◽  
Resonant Circuit ◽  
Experimental Demonstration ◽  
Radiation Patterns ◽  
Left Handed ◽  
Dual Band Antenna ◽  
Compact Size ◽  
New Type

A new type of hybrid resonant circuit model is investigated theoretically and experimentally. The resonant model consists of a right hand (RH) patch part and a composite right and left handed (CRLH) part (RH + CRLH), which determines a compact size and also a convenient frequency modulation characteristic for the proposed antennas. For experimental demonstration, two antennas are fabricated. The former dual-band antenna operating at f-1=3.5 GHz (Wimax) and f+1=5.25 GHz (WLAN) occupies an area of 0.21λ0×0.08λ0, and two dipolar radiation patterns are obtained with comparable gains of about 6.1 and 6.2 dB, respectively. The latter antenna advances in many aspects such as an ultrasmall size of only 0.16λ0×0.08λ0, versatile radiation patterns with a monopolar pattern at f0=2.4 GHz (Bluetooth), and a dipole one at f+1=3.5 GHz (Wimax) and also comparable antenna gains. Circuit parameters are extracted and researched. Excellent performances of the antennas based on hybrid resonators predict promising applications in multifunction wireless communication systems.

scholarly journals AMC backed circularly polarized dual band antenna for Wi-Fi and WLAN applications

2020 ◽  
Vol 71 (5) ◽  
pp. 298-307
Author(s):  
Gande B. G. Tilak ◽  
Sarat K. Kotamraju ◽  
Boddapati T. P. Madhav ◽  
Korada C. S. Kavya ◽  
Manikonda V. Rao
Keyword(s):  
Circular Polarization ◽  
Parametric Analysis ◽  
Dual Band ◽  
Radiation Patterns ◽  
Circularly Polarized ◽  
Design And Implementation ◽  
Dual Band Antenna ◽  
Proposed Model ◽  
Overall Performance ◽  
Meander Line

Abstract In this article the design and implementation of dual band circularly polarized antenna which is backed with AMC is presented. The proposed antenna consists of a novel heart shaped concentric ringshaped patch attached to meander line. The dimension of the antenna without AMC is 0.24 λ0 × 0.140 λ0 × 0.012 λ0 × and with AMC 0.43 λ0 × 0.43 λ0 × 0.32 λ0 and designed on a commercial FR4 substrate. The antenna gets worked at dual band applications such as 2.4 GHz (wi-fi) operates from 2.3 GHz to 2.5 GHz and 5.2 GHz (WLAN) operates from 4.7 GHz to 5.9 GHz and also gets circular polarization from 2.3 GHz to 2.5 GHz (200 MHz) and 4.95 GHz to 5.40 GHz (450 MHz) is achieved. In this article the proposed model is investigated towards circular polarization, radiation patterns and current distributions by varying parametric analysis is carried to analyze overall performance of antenna with and without AMC.

Dual-band stacked circularly polarized microstrip antenna for S and C band applications

2015 ◽  
Vol 8 (8) ◽  
pp. 1215-1222 ◽  
Author(s):  
Sachin Kumar ◽  
Abhishek Sharma ◽  
Binod K. Kanaujia ◽  
Mukesh K. Khandelwal ◽  
Anil Kumar Gautam
Keyword(s):  
Circular Polarization ◽  
Microstrip Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Radiation Characteristics ◽  
Antenna Structure ◽  
Circularly Polarized ◽  
Patch Structure ◽  
Dual Band Antenna ◽  
Good Agreement

A single-fed circularly polarized microstrip antenna is proposed where the antenna structure exhibits truncated corners in the radiating square patch. The truncated corners square patch structure is loaded with a circular slot and is resonating at 2.25 GHz with circular polarization. Furthermore, the proposed antenna is stacked using an upper circular patch thus achieving a dual-band circularly polarized pattern. The dual-band antenna resonates at 2.25 GHz in the first band and with impedance bandwidth ranging from 4.4 to 5.5 GHz in the second band. The size of the proposed stacked structure is compact compared with the conventional circularly polarized stacked antenna designs. Proposed structures are fabricated and fed using Subminiature version A (SMA) connector. The measured results are in good agreement with the simulated. The antenna shows stable radiation characteristics for the entire band of operation.

A Novel Reconfigurable Cpw-Fed Slot Antenna

2011 ◽  
Vol 474-476 ◽  
pp. 1334-1337
Author(s):  
Yong Jie Yang ◽  
Hui Jing Sui ◽  
Jian Xin Chen
Keyword(s):  
Current Distribution ◽  
Frequency Hopping ◽  
Slot Antenna ◽  
Radiation Patterns ◽  
Pin Diodes ◽  
Magnetic Current ◽  
Slot Line ◽  
Half Wavelength ◽  
Low Profile ◽  
Good Agreement

A novel low-profile reconfigurable CPW-fed slot antenna that is designed using a half-wavelength slot-line resonator is proposed in this paper. Frequency hopping can be easily achieved by incorporating a pair of PIN diodes, being controlled in either their on or off state. Benefited from the magnetic current distribution of a half-wavelength slot-line resonator, the radiation patterns at the two operating frequencies (1.8GHz and 2.45GHz) are very stable, being almost identical. The proposed antenna is designed and fabricated, and the theoretical and measured results are presented and show good agreement.

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