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

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 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 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 Low Radar Cross-section and Low Cost Dipole Antenna Reflector

2017 ◽  
Vol 6 (3) ◽  
pp. 25 ◽  
Author(s):  
G. G. Machado ◽  
M. T. De Melo ◽  
H. V. H. Silva Filho ◽  
A. G. Neto ◽  
T. R. De Souza
Keyword(s):  
Laboratory Experiment ◽  
Cross Section ◽  
Return Loss ◽  
Low Cost ◽  
Frequency Selective Surface ◽  
Dipole Antenna ◽  
Electrical Conductor ◽  
Perfect Electrical Conductor ◽  
Antenna Reflector ◽  
Good Agreement

This paper presents a method for reducing Radar CrossSection (RCS) of an increased gain metal backed dipole antenna. Numerical simulations were done and compared to a laboratory experiment. The results show that when a Perfect Electrical Conductor (PEC) is replaced by a Frequency Selective Surface (FSS), the antenna is still able to perform with the desired characteristics, but the RCS of the structure is greatly reduced out of band. The design of the FSS and the return loss, gain improvement, and RCS are presented for an antenna operating at 4.2GHz, and the results are compared with a conventional metal backed layout. Measurements show a good agreement with the simulations, and so the advantages on other structures from the reviewed literature are mentioned.

scholarly journals Bandwidth Enhancement of Tri-band Rectangular Dielectric Resonator Antenna using Novel Offset Feed for WLAN/WIMAX Applications

2020 ◽  
Vol 9 (5) ◽  
pp. 2305-2308
Keyword(s):  
Dielectric Resonator ◽  
Microstrip Line ◽  
Return Loss ◽  
Radiation Efficiency ◽  
Antenna Design ◽  
Design Parameters ◽  
Dielectric Resonator Antenna ◽  
Bandwidth Enhancement ◽  
Frequency Bands ◽  
Rectangular Dielectric Resonator Antenna

In this article, a novel offset microstrip line feed Rectangular Dielectric Resonator Antenna is used for bandwidth enhancement. The parameters such as Bandwidth, Return Loss and Radiation efficiency are improved in the proposed antenna. A comparison is also shown for the proposed feed structure with and without conformal strips. The improvement in the bandwidth is observed from 25% to 65% by optimizing the antenna design parameters. It works in three frequency bands, that is, 2.03-3.69 GHz, 3.86-7.26 GHz, and 7.32-9.26 GHz. The proposed antenna is appropriate for WIMAX/WLAN applications.

scholarly journals Asymmetric-Slit Method on WiFi Antenna with 2.4 GHz and 5 GHz Frequency

2020 ◽  
Vol 4 (2) ◽  
pp. 53
Author(s):  
Petrus Kerowe Goran ◽  
Eka Setia Nugraha
Keyword(s):  
Microstrip Antenna ◽  
Return Loss ◽  
Antenna Design ◽  
The Internet ◽  
Information Searching ◽  
Simple Method ◽  
A Value ◽  
Simulation Results ◽  
5 Ghz ◽  
Antenna Model

Wireless Fidelity (WiFi) devices are often used to access the internet network, both for working and in information searching. Accessing the internet can be administered anywhere provided that the area is within the WiFi devices range. A WiFi device uses 2.4 GHz and 5 GHz operating frequencies. There were several methods employed in the previous studies so that an antenna design could work in two different frequencies, i.e., winding bowtie method, Sierpinski method, and double-circular method. This paper employed a simple method, the slit method. The objective of this paper is to discover a simple antenna model that works on 2.4 GHz and 5 GHz frequencies. This paper employed a square patch microstrip antenna with a slit method. The dimensions of the designed square patch microstrip antenna were 42.03 mm × 27.13 mm × 0.035 mm. The antenna worked at 2.4 GHz and 5 GHz frequencies. The obtained simulation results after the optimization showed that the square patch microstrip antenna using the slit method acquired a value of S11 (return loss) of -10.15 dB at a frequency of 2.4 GHz and -37.315 dB at a frequency of 5 GHz.

Embroidery Leaf Shape Dipole Antenna Performances and Characterisation

2017 ◽  
Vol 7 (3) ◽  
pp. 1467
Author(s):  
N. J. Ramly ◽  
M. K. A. Rahim ◽  
N. A. Samsuri ◽  
H. A. Majid
Keyword(s):  
Return Loss ◽  
Leaf Shape ◽  
Dipole Antenna ◽  
Antenna Design ◽  
Operating Frequency ◽  
Ism Band ◽  
Textile Antenna ◽  
Different Types

In this paper, leaf shape textile antenna in ISM band has been chosen to study. The operating frequency of the dipole antenna is 2.45GHz. The effect of conductive threads with three different types of sewing has been analysed. The first type of sewing leaf shape dipole antenna is to stitch around itself and embroidered into a fleece fabric with circular follow by vertical and horizontal stitch respectively. From measured return loss, the antenna with circular stitch shows better performances with optimum resonances compared with the two types of stitching. The measured results confirm that the circular stitch is more suitable for leaf shape dipole antenna design. Thus it can be concluded that different stitch gives different results for leaf shape dipole antenna.

Evaluation of Specific Absorption Rate due to Medical Implant in Near-Field Exposure

2013 ◽  
Vol 64 (3) ◽  
Author(s):  
Nazirah Othman ◽  
Noor Asmawati Samsuri ◽  
Norfatin Akma Ellias
Keyword(s):  
Intramedullary Nail ◽  
Specific Absorption Rate ◽  
Near Field ◽  
Dipole Antenna ◽  
Medical Implants ◽  
Field Exposure ◽  
Maximum Enhancement ◽  
Medical Implant ◽  
Measurement Results ◽  
Simulation Results

This paper presents the effects of conductive medical implant on energy absorbed by the human body and the testicular area when exposed to near field electromagnetic radiation. A dipole antenna is used as the radiating source and it is placed in front of the trousers pocket. Two types of medical implants are used in this study: intramedullary nail and bone plate. Numerical simulations are performed by means of CST Microwave Studio. Results are discussed in terms of changes in SAR values due to the presence of conductive medical implant at 0.4, 0.9, 1.8 and 2.4 GHz. The results have indicated that the conductive intramedullary nail that is located inside the femur significantly increases the SAR. Maximum enhancement in SAR is found when the length of the intramedullary nail is approximately one wavelength of the respective frequency tested. The measurement results indicate good agreements with the simulation results at 2.4 GHz.

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