scholarly journals A reconfigurable high-gain metal-graphene printed dipole antenna for Wi-Fi and LTE applications

2021 ◽  
Author(s):  
Roghaye Ebadzadeh ◽  
Pejman Mohammadi ◽  
Mahdi Zavvari
Keyword(s):  
Return Loss ◽  
High Gain ◽  
Dipole Antenna ◽  
Patch Antennas ◽  
Graphene Layers ◽  
Chemical Potentials ◽  
Simulation Results

Abstract This study presents the design of a reconfigurable c-shaped dipole antenna for Wi-Fi and LTE bands. It consists of two nested c-shape resonators located inside each of the wings of the c-dipole patch antennas. The mentioned resonators have been used due to their inductive and capacitive effects. The reconfigurable property of the proposed antenna has been achieved with two graphene layers which are deposited on two gaps over the patch antennas.The graphene layers adjust the return loss of the proposed antenna into the desired band. These graphene layers are examined with different chemical potentials, so that the antenna return loss changes over the. The simulation results show that the gain of the antenna is higher than 5dB for both LTE and Wi-Fi applications.

scholarly journals Yagi Array of Microstrip Quarter-Wave Patch Antennas with Microstrip Lines Coupling

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Juhua Liu ◽  
Yue Kang ◽  
Jie Chen ◽  
Yunliang Long
Keyword(s):  
Horizontal Plane ◽  
Return Loss ◽  
High Gain ◽  
Main Beam ◽  
Patch Antennas ◽  
Vertical Polarization ◽  
Microstrip Lines ◽  
Low Profile ◽  
Quarter Wave ◽  
Peak Gain

A new kind of Yagi array of quarter-wave patch antennas is presented. The Yagi array has a low profile, a wide bandwidth, and a high gain. A main beam close to endfire is produced, with a vertical polarization in the horizontal plane. A set of microstrip lines are introduced between the driven element and the first director element to enhance the coupling between them, and therefore the bandwidth could be increased and the back lobes could be suppressed. Measured results show that the Yagi array with 4 elements generates a peak gain of about 9.7 dBi, a front-to-back ratio higher than 10 dB, and a 10 dB return loss band from 4.68 GHz to 5.24 GHz, with a profile of 1.5 mm and an overall size of 80 × 100 mm2. An increase of the number of director elements would enhance the gain and have the main beam pointing closer to endfire.

scholarly journals Triple-Band Dual-Polarized Dipole Antenna for 5G Sub-6 GHz Communications

2021 ◽  
Author(s):  
Lixia Yang ◽  
Hafiz Usman Tahseen ◽  
Syed Shah Irfan Hussain ◽  
Wang Hongjin
Keyword(s):  
Return Loss ◽  
Beam Width ◽  
High Gain ◽  
Dipole Antenna ◽  
Base Station ◽  
Iot Applications ◽  
Measured Impedance ◽  
Dual Polarized ◽  
Half Power ◽  
Triple Band

Abstract A triple-band ±45° dual-polarized dipole antenna is presented in this paper. The proposed antenna covers two bands from n77 and one from n79 5G NR frequency spectrums. The profile antenna exhibits the measured impedance bandwidths 3.6-3.85 GHz, 4.05-4.2 GHz and 4.8- 5.15 GHz with S11, S22 < - 15dB return loss. Antenna is fabricated with four substrates; one radiator, one reflector and two feeding baluns. Antenna is designed and optimized with HFSS simulator and fabricated for experimental verification. Antenna gives a stable radiation pattern with 8.55dBi high gain and 70° half power beam width (HPBW) that makes it a good candidate for wireless 5G sub-6 GHz and multiband base station applications. Finally, antenna is tested in a realistic application environment to show the utility of the proposed antenna for wireless sub-6 GHz IoT applications.

scholarly journals Design of high directional crossed dipole antenna with metallic sheets for UHF and VHF applications

2017 ◽  
Vol 7 (1.5) ◽  
pp. 42
Author(s):  
I. Govardhani ◽  
M. Venkata Narayana ◽  
A. Navya ◽  
A. Venkatesh ◽  
S. Charles Spurjeon ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Return Loss ◽  
High Gain ◽  
Dipole Antenna ◽  
Radiation Efficiency ◽  
Dual Band ◽  
Cross Polarization ◽  
Radiation Patterns ◽  
Metallic Plates

A compact dual band cross dipole antenna surrounded with metallic plates at five sides has been proposed in this article. comparative analysis has been done between the dipole and cross dipole antenna. On comparing these two antennas the proposed antenna has the high gain of 7db and radiation efficiency of 95 percent. The peak directivity of the proposed antenna is 5DB and its front to back ration is 60. The return loss, gain, radiation patterns and co polarization and cross polarization of the antenna has been observed and analysed using AN-soft HFSS v13.The proposed antenna works at the range of 0.6GHz to 1.5GHz which covers the applications like GSM, GNSS and some of the applications which covers in the range of UHF and VHF.

Design and development of cross dipole antenna for satellite applications

Frequenz ◽  
2020 ◽  
Vol 74 (7-8) ◽  
pp. 229-237
Author(s):  
Malaisamy K ◽  
Santhi M ◽  
Robinson S ◽  
Mohd Wasim ◽  
Murugapandiyan P
Keyword(s):  
Return Loss ◽  
Satellite Communication ◽  
High Gain ◽  
Dipole Antenna ◽  
Primary Objective ◽  
Array Configuration ◽  
Feeding Technique ◽  
Satellite Applications ◽  
Alternative Feeding ◽  
Ku Band

AbstractIn this paper, a cross dipole antenna is proposed, designed, and developed for satellite communication applications. The design incorporates an alternative feeding mechanism of the coaxial/probe feeding technique with balun. The primary objective of this paper is to develop the high gain antenna with an array configuration for satellite communication. The performance parameters of an antenna such as return loss, radiation pattern, gain and directivity are investigated for cross dipole antenna and 1 × 2, 1 × 4 array configurations. It operates for Ku band (12–18 GHz) and produces a high gain with low return loss. The proposed antenna has five useful bands and exhibits a peak directive gain of 13.21 dBi at 12.4 GHz with a bandwidth of 0.89 GHz. Additional bands are also offering a gain of 11.23 dBi with a bandwidth of 0.849 GHz at 10.6 GHz, 6.59 dBi with a bandwidth of 0.6 GHz at 11.5 GHz, 12.13 dBi with a bandwidth of 1.37 GHz at 14.2 GHz and 10.47 dBi with a bandwidth of 1.3 GHz at 15.8 GHz. The cross dipole antenna is analyzed for 1 × 2, 1 × 4 array configuration in order to improve the overall gain. The proposed antenna is fabricated on FR4 substrate with a dielectric constant of 4.4 and loss tangent (tan δ) of 0.007 with the thickness of 1.6 mm. The size of the proposed antenna is 72 × 84 mm. The proposed antenna meets the requirements of an antenna which is operating at Ku band; hence, it is found to be suitable for real time applications.

scholarly journals SIMULASI ANTENA DIPOLE ½ λ DENGAN FREKUENSI KERJA 128,4 MHz UNTUK RADIO PEMANCAR ATIS MENGGUNAKAN SOFTWARE SIMULASI DI BANDAR UDARA INTERNASIONAL HUSEIN SASTRANEGARA BANDUNG

2020 ◽  
Vol 4 (4) ◽  
pp. 27-35
Author(s):  
Ade Irfansyah ◽  
Sudrajat Sudrajat ◽  
Lailatul Fitriyah
Keyword(s):  
Return Loss ◽  
Dipole Antenna ◽  
Software Application ◽  
Antenna Beam ◽  
Radio Transmitter ◽  
Antenna Length ◽  
Radio Equipment ◽  
Simulation Results ◽  
Gap Width ◽  
Beam Range

VHF telecommunications radio equipment, especially ATIS equipment is equipment used to inform information around the airport, such as weather, taxiways, runaway, etc. ATIS equipment works on frequencies between 118-137 MHz. The problem that arises is in the ATIS equipment that is the lack of antenna beam coverage on the ATIS radio transmitter, which is <100 NM, while the normal ATIS beam range is in the range of 150-200 NM. The author simulates dipole antenna ½ λ using the CST studio SUITE software application and compares the results of the simulation with the antenna specifications on the current ATIS equipment. Antenna simulation is done by making antenna dimensions and calculating the wavelength parameters, antenna length, antenna gap width, then the simulation results with the antenna length of 1040 mm and a gap of 5.545 mm, and a diameter of 3 mm, the results obtained are VSWR of 1.51 and return loss of -13,804, with a bandwidth of 12.13 MHz. These parameters were compared with the ATIS equipment antenna specifications at Bandung Husein Sastranegara International Airport and there was an increase in parameters after simulating.

scholarly journals A Compact Triple Band EBG Using Interdigital Coplanar Waveguide Structure for Antenna Gain Enhancement

2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
Prapoch Jirasakulporn ◽  
Pongsathorn Chomtong ◽  
Kamorn Bandudej ◽  
Prayoot Akkaraekthalin
Keyword(s):  
Communication Systems ◽  
Coplanar Waveguide ◽  
High Gain ◽  
Dipole Antenna ◽  
Unit Cell Dimension ◽  
Unit Cell ◽  
Gain Enhancement ◽  
Compact Size ◽  
Simulation Results ◽  
Triple Band

A new triple band EBG unit cell with compact size has been designed, fabricated, and tested. The proposed EBG unit cell is based on a square mushroom-like EBG (M-EBG) structure with an interdigital coplanar waveguide (ICPW). With this technique, the size of the proposed ICPW-EBG structure has been reduced from λ/2 to λ/4 compared with the conventional M-EBG unit cell dimension, which is 18 × 18 mm2. The proposed unit cell was designed in order to respond for three frequency bands at 1.8 GHz, 2.45 GHz, and 3.7 GHz. An array of 10 × 10 unit cell was also designed as a reflector with an overall dimension of 181.8 × 181.8 mm2. The dipole antennas were implemented over the designed reflector with a short distance of λ/8 to radiate electromagnetic wave. The simulation results showed that the ICPW-EBG reflector can improve directivity of the dipole antenna to be 9.12 dB at 1.8 GHz, 9.02 dB at 2.45 GHz, and 8.40 dB at 3.7 GHz. The measurement directivities agreed well with simulation results including 8.72 dB at 1.8 GHz, 8.56 dB at 2.4 GHz, and 8.1 dB at 3.7 GHz. This is the first design of triple band EBG unit cell with 50% size reduction compared with the conventional structure at the same frequency. The designed ICPW-EBG reflector with dipole antenna results in the triple band operation, low-profile and high gain suitable for modern wireless communication systems.

scholarly journals Design and Optimization of Genetic Algorithm (GA) based High Gain and Directive CPW-Fed Slot Dipole Antenna for Wideband Applications

2019 ◽  
Vol 9 (2) ◽  
pp. 2572-2575
Keyword(s):  
Genetic Algorithm ◽  
Return Loss ◽  
High Gain ◽  
Dipole Antenna ◽  
Design And Optimization ◽  
X Band ◽  
Measurement Results ◽  
Loss Parameter ◽  
Operating Bandwidth ◽  
Wide Operating

Genetic Algorithm (GA) is proposed in this paper for the design of a wide bandwidth, high gain and directive CPW-fed slot-dipole antenna. The proposed antenna is built on a FR4 substrate that is cheap and easy to produce. Genetic Algorithm is used to select parameters that reflect antenna geometry to achieve wider bandwidth and reduced return loss (parameter S11) and high gain values at resonant frequency. The antenna design shows a wide operating bandwidth of 1.4 GHz (simulated) and 1.3 GHz (measured) over the X-band, a return loss (S11) of -25.83 dB (simulated) and -23.08 (measured) and a gain and directivity of 5.61 dB (simulated) and 11.87 dB (simulated) at 10.5 GHz resonating frequencies. In this work, all simulations were performed using the ANSYS HFSS v14.0 software. A prototype antenna was produced and then characterized using VNA to validate the design. Measurement results were in good agreement with the results simulated using ANSYS HFSS.

scholarly journals Enhanced Dipole Antenna for RFID by Using Metamaterials

2021 ◽  
Vol 8 (2) ◽  
pp. 47-50
Author(s):  
Nail Alaoui ◽  
Aicha Djalab ◽  
Lakhdar Bouhamla ◽  
Abdellah Azouze ◽  
Rania Ibtissam Benmelouka ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Resonant Frequency ◽  
Radiation Pattern ◽  
Return Loss ◽  
Dipole Antenna ◽  
Frequency Characteristics ◽  
Antenna Design ◽  
Antenna Size ◽  
Novel Method ◽  
Simulation Results

The paper at hand discusses a novel method of miniaturization of antenna design using metamaterials. We suggest a novel method to improve frequency characteristics while reducing antenna size. This method is based on the connection of this element resonant two split rings resonator. The resonant frequency, return loss, bandwidth, radiation pattern, gain, directivity, electromagnetic field, and current supplied by the proposed antenna are the parameters addressed in this study. CST software generates all simulation results.

scholarly journals Designing of a 2x2 E-shaped Microstrip Patch Grid Antenna

2021 ◽  
Vol 20 ◽  
pp. 123-127
Author(s):  
Juhi K. Baruah ◽  
Kandarpa Kumar Sarma ◽  
Sivaranjan Goswami
Keyword(s):  
Return Loss ◽  
Beam Width ◽  
Single Element ◽  
Patch Antennas ◽  
Gain Bandwidth ◽  
Microstrip Lines ◽  
Microstrip Patch ◽  
Loss Parameter ◽  
Feed Network ◽  
Simulation Results

In this work, a 2×2 grid of E-shaped patch antennas is proposed. The design of the grid is achieved through the design of a single element, the design of a 1×2 array and finally the design of the 2×2 grid on an FR4 epoxy substrate of thickness 1.5 mm. A corporate feed network of microstrip lines is used to excite the array. The performance of each stage is studied in terms of the return loss parameter, the far field gain, and the beam-widths are observed in each case from simulation results. The resonant frequency in each case is 3.8 GHz. It is observed that as the number of elements is increased, the beam-width reduces. In other words, the directivity is increased. Further, it is also observed that the gain and bandwidth is the minimum for the single patch, followed by that of the 1×2 array and the maximum for the 2×2 grid. Thus, the construction of the grid leads to increase in gain, bandwidth and directivity of the antenna.

Two-Band Antenna Reflection Board Using Multi-Layer Mush-Like EBG

2014 ◽  
Vol 556-562 ◽  
pp. 2202-2207
Author(s):  
Qing Feng Zhao ◽  
Su Ling Wang ◽  
Nan Guo
Keyword(s):  
Double Layer ◽  
Return Loss ◽  
Dipole Antenna ◽  
Frequency Bands ◽  
Double Frequency ◽  
Reflection Phase ◽  
Simulation Results ◽  
Antenna Reflector

A Multi-layer mush-like EBG used as the reflector of dipole antenna is discussed. The paper focuses on the reflection phase feature of Multi-layer mush-like EBG surface. Compared with classical double layer EBG reflector which has one in-phase frequency the proposed structure can realize two or more in-phase frequencies resonance thus could be used as double frequency antenna reflector. The simulation results proved that the proposed EBG structure had a good return loss meanwhile both radiating patterns of the two frequency bands meets the expectations well and the antenna’s gains of the two bands are more than 7.08dB

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