scholarly journals Pattern Reconfigurable Patch Antenna menggunakan Edge Shorting Pin dan Symmetrical Control Pin

2015 ◽  
Vol 3 (2) ◽  
pp. 177
Author(s):  
DWI ANDI NURMANTRIS ◽  
HEROE WIJANTO ◽  
BAMBANG SETIA NUGROHO
Keyword(s):  
Genetic Algorithm ◽  
Finite Element ◽  
Patch Antenna ◽  
Impedance Matching ◽  
Single Layer ◽  
Reconfigurable Antenna ◽  
Circular Patch ◽  
Finite Element Software ◽  
Shorting Pin ◽  
Circular Line

ABSTRAKMetode baru dalam mendesain suatu pattern reconfigurable antenna telah diteliti. Penelitian ini fokus pada optimasi antena patch lingkaran single layer pencatuan probe koaksial dengan mengintegrasikan 24 switch/shorting pin pada sisi patch yang disebut edge shorting pin dan 8 shorting pin membentuk lingkaran dengan radius tertentu dan selanjutnya disebut symmetrical control pin yang fungsinya sebagai metode penyepadan impedansi. Algoritma Genetika yang dikombinasikan dengan Finite Element Software digunakan untuk mengoptimasi kombinasi  switch, radius lingkaran symmetrical control pin, dan radius patch untuk mendapatkan kemampuan pattern reconfigurability. Antena ini menghasilkan 8 kemungkinan arah radiasi azzimuth dengan resolusi 45o dan arah elevasi 30o pada frekuensi 2,4 Ghz. Optimasi, simulasi, fabrikasi, dan pengukuran dilakukan untuk memverifikasi hasil penelitian.Kata kunci: Patch Lingkaran, Edge Shorting Pin, Symmetrical Control Pin, Algoritma Genetika, Pattern Reconfigurable ABSTRACTNew method for desaining pattern reconfigurable antenna was studied. This study focuses on the optimization of a single layer circular patch antenna with probe feed by integrating the 24 switch / shorting pin on the side of the patch that called Edge Shorting Pins and 8 shorting pins form circular line in such radius that called Symmetrical Control Pins as a impedance matching method. Genetic algorithm combined with the Finite Element Software is used to optimize the switch combination, the radius of circular line of symmetrical control pins, and the patch radius to obtain a pattern reconfigurability capabilities. This antenna produces 8 possible directions of azimuth radiation with a resolution of 45o and 30o elevation direction at a frequency of 2.4 GHz. Optimization, simulation, fabrication, and measurement was done to verify the results.Keywords: Circular Patch, Edge Shorting Pin, Symmetrical Control Pin, Genetic Algorithm, Pattern Reconfigurable

scholarly journals Optimasi Pattern Reconfigurable Antenna Bercelah Melingkar menggunakan Algoritma Genetika

2020 ◽  
Vol 8 (1) ◽  
pp. 111
Author(s):  
DWI ANDI NURMANTRIS ◽  
HEROE WIJANTO ◽  
BAMBANG SETIA NUGROHO
Keyword(s):  
Genetic Algorithm ◽  
Finite Element Method ◽  
Finite Element ◽  
Fitness Function ◽  
Impedance Matching ◽  
Optimization Method ◽  
Computational Method ◽  
Antenna Design ◽  
Reconfigurable Antenna ◽  
Element Method

ABSTRAK Penelitian ini bertujuan untuk mendapatkan suatu desain pattern reconfigurable antenna dengan menitikberatkan pada optimasi antena planar berbentuk lingkaran dengan 24 switch berupa shorting pin pada tepi patch dan menambahkan celah melingkar pada patchnya sebagai metode penyepadan impedansi. Algoritma Genetika digunakan sebagai metode optimasi antena sedangkan Finite Element method digunakan sebagai metode komputasi untuk mendapatkan nilai parameter antena ketika proses evaluasi fungsi fitness. Keduanya dikolaborasikan untuk mendapatkan suatu desain antena yang mempunyai kemampuan pattern reconfigurable. Hasilnya diperoleh suatu desain antena pada frekuensi 2,4 Ghz dengan 24 pola pancar yang bisa di switch ke seluruh bidang azzimuth dimana semua pola pancar didesain pada arah elevasi 45o. Kata kunci: optimasi, celah melingkar, algoritma genetika, pattern reconfigurable antenna ABSTRACT This research aims to obtain a reconfigurable antenna pattern design with emphasize on the optimization of a planar circular antenna with 24 switchs on the edge of the patch and add a slit ring in the patch as a impedance matching method. Genetic Algorithm is used as an antenna optimization method while the The Finite Element method is used as a computational method to obtain the antenna parameters value when evaluating the fitness function. Both collaborated to obtain an antenna design that has the pattern reconfigurable ability. The result is 2,4 Ghz antenna design with 24 radiation patterns that can be switched to all azzimuth plane where all are designed in 45o of elevation plane. Keywords: optimization, slit ring, genetic algorithm, pattern reconfigurable antenna

scholarly journals Design, Simulation and Fabrication of an Implanted Antenna at ISM Band in Body Tissue

2021 ◽  
Author(s):  
Majedeh Seydi ◽  
Mohammad Sajjad Bayati
Keyword(s):  
Patch Antenna ◽  
Biomedical Applications ◽  
Impedance Matching ◽  
Ism Band ◽  
Microstrip Patch ◽  
Rectangular Patch ◽  
Shorting Pin ◽  
L 14 ◽  
Minced Meat ◽  
Coaxial Probe

Abstract A rectangular meandering-microstrip patch antenna (RM-MPA) with shorting pin for implant antenna and biomedical applications at industrial, scientific, and medical (ISM) band is proposed. The rectangular patch has length of l =14 mm and width of w =9.4 mm. The substrate and superstrate are made of Rogers 3210 with dielectric constant equals 10.2. The RMMPA is placed between the substrate and superstrate dielectric layers whose same thickness equals 0.635 mm. The proposed antenna is fed by a 50-ohm coaxial probe, at the centre of the length and edge of the width of the patch. The input impedance of patch antenna varies with the patch geometry. Thus, the geometry of the patch changed to achieve impedance matching at ISM band. The rectangular patch divided to three sections along width for meandering. The resonance frequency is tuned by meandering each section. The proposed antenna is simulated in free space and skin phantom. Proposed antenna has efficiency of 90%, bandwidth 1.02%. Both radiation pattern and SAR are evaluated which SAR level is below the safety and satisfies SAR standards. Finally, the antenna is tested in minced meat and tissue liquid.

Three‐dimensional circular patch antenna under TM 02 mode with improved impedance matching

2019 ◽  
Vol 55 (4) ◽  
pp. 169-170 ◽  
Author(s):  
Shiyan Wang ◽  
Lei Zhu ◽  
Jianpeng Wang ◽  
Wen Wu
Keyword(s):  
Patch Antenna ◽  
Impedance Matching ◽  
Three Dimensional ◽  
Circular Patch ◽  
Circular Patch Antenna

Structural Design and Analysis of Aluminum Dome for Caofeidian Coal Storage

2016 ◽  
Vol 710 ◽  
pp. 396-401 ◽  
Author(s):  
Ze Chao Zhang ◽  
Hong Bo Liu ◽  
Xiao Dun Wang ◽  
Xiang Yu Yan ◽  
Jing Hai Yu ◽  
...  
Keyword(s):  
Finite Element ◽  
Aluminum Alloys ◽  
Three Dimensional ◽  
Single Layer ◽  
Element Model ◽  
Internal Force ◽  
Structural Deformation ◽  
Mode Analysis ◽  
Finite Element Software ◽  
The Stability

The upper part of Caofeidian coal storage was approximately hemispherical aluminum shell, covered with aluminum alloys plate. The capsule was made of aluminum alloys material, and its span was 125 meters. In the design, according to TEMCOR joint, we used the finite element software MIDAS to build the accurate geometry models and calculation models of aluminum alloys single layer latticed dome structures. By the combination of constant loads, live loads, snow load, wind load, temperature effect and other working conditions, we summarized the consumption of aluminum of the structures, and studied the structural internal force, structural deformation and structural stiffness. In addition, the X and Y two different direction seismic dynamic load was applied to the structure. The structural seismic performance under two kinds of modes were studied through the structure mode analysis of the vibration frequency. The vierendeel dome and single layer dome were controlled by the stability. ANSYS three-dimensional frame element model were set up, and the eigenvalue buckling analysis was carried out. By the geometrical nonlinear finite element method, combining with initial imperfections and material nonlinear, we found out the stability coefficient and the weak parts of the structure.

Layout Optimization of a Multiple Pinned Joint Under Bending in a Limited Contact Area

2013 ◽  
Author(s):  
Amir Mohsen Hejazi ◽  
Mohammad Pourgol Mohammad
Keyword(s):  
Genetic Algorithm ◽  
Finite Element ◽  
Stress Concentration ◽  
Stress Analysis ◽  
Optimization Problem ◽  
Optimization Problems ◽  
Optimization Methods ◽  
Limited Area ◽  
Design Factor ◽  
Finite Element Software

Layout determination of connectors in different mechanical configurations improves the design characteristics. The issue has recently become more practical in sensitive industries, especially in montage processes. Since connections are under different loads like bending, the layout of connection should be considered as an effective design factor in different loading conditions which is itself a step forward in achieving the optimized connection and also increases the connection life. This paper analyses the layout effects in a multiple pinned joint under bending in a limited area. The goal is to minimize the average stress and having a uniform stress distribution in the connections in order to prevent the failure inducing effect of stress concentration. The common method for solving these optimization problems is to couple two finite element numerical stress analysis software with an optimization tool or independent software which is a highly time consuming method due to enormous volume of the calculations in each iteration. In this paper the optimization problem is mathematically modeled and solved using Genetic Algorithm (GA). Genetic algorithm is found applicable here due to nonlinear behavior and complexity of the objective function in the optimization problem where analytical optimization methods are not useful. The validation results of stress analysis are obtained using finite element software. The optimized connections have longer lifetime and can carry higher loads because of degraded effects of stress concentration and minimized stresses.

scholarly journals Wideband Design of Circular Microstrip Patch Antenna using Rectangular Metal Sheet Superstrate for X-Band Applications

2020 ◽  
Vol 9 (7) ◽  
pp. 987-992
Keyword(s):  
Patch Antenna ◽  
Impedance Matching ◽  
Dielectric Substrate ◽  
Microstrip Patch Antenna ◽  
Metal Sheet ◽  
Impedance Bandwidth ◽  
Circular Patch ◽  
Microstrip Patch ◽  
X Band ◽  
Simple Change

A wideband circular microstrip patch antenna (CMPA) has been presented employing a rectangular metal sheet superstrate. The proposed concept follows a unique, simple, and a flexible design approach to enhance the bandwidth of a circular patch. A simple change in the conventional antenna geometry has been suggested by adding a rectangular metal sheet superstrate, placed symmetrically above the patch. A cylindrical shaped foam spacer has been used to provide mechanical support to the optimized superstrate. The proposed antenna offers about 36% of impedance matching bandwidth ranging between 8.46 GHz to 12.06 GHz with a total bandwidth of 3.6 GHz. Whereas, a conventional circular patch, resonating at 9.96 GHz, hardly shows about 4.8% of impedance bandwidth (480 MHz) only. In addition to the enhanced bandwidth characteristics, the proposed antenna, also reveals a little increase in the gain throughout the operating frequency band. For the experimental validation, a set of antenna prototype has been fabricated using the commercially available dielectric substrate. The measured result is very closely agreed with the simulated predictions.

scholarly journals Patch Antenna-in-Package for 5G Communications with Dual Polarization and High Isolation

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1223
Author(s):  
Hugo Santos ◽  
Pedro Pinho ◽  
Henrique Salgado
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Method Of Moments ◽  
Patch Antenna ◽  
Single Layer ◽  
Dual Polarization ◽  
High Isolation ◽  
Feeding Technique ◽  
Pattern Stability ◽  
Peak Gain

In this paper, we describe the design of a dual polarized packaged patch antenna for 5G communications with improved isolation and bandwidth for K-band. We introduce a differential feeding technique and a heuristic-based design of a matching network applied to a single layer patch antenna with parasitic elements. This approach resulted in broader bandwidth, reduced layer count, improved isolation and radiation pattern stability. The results were validated through finite element method (FEM) and method of moments (MoM) simulations. A peak gain of 5 dBi, isolation above 40 dB and a radiation efficiency of 60% were obtained.

scholarly journals Influence of welding deformation on anti-collapse performance of single-layer reticulated shell structures with prestressed cables

2021 ◽  
Vol 2045 (1) ◽  
pp. 012018
Author(s):  
Y Q Fu ◽  
X D Yang ◽  
H D Zhang ◽  
Y M Wang
Keyword(s):  
Finite Element ◽  
Shell Structure ◽  
Single Layer ◽  
Shell Structures ◽  
Welding Deformation ◽  
Finite Element Software ◽  
Reticulated Shell Structure ◽  
Prestressed Cable

Abstract In this paper, the ABAQUS finite element software is used to model and analyze the single-layer reticulated shell structure. And the method of removing the constraints of key components is used to analyze the anti-continuous collapse performance of this reticulated shell structure under the action of geometric defects and welding deformation. Welding deformation is mainly caused by welding and prestressed cable tensioning of single-layer reticulated shell. The results show that the removal of the key columns under the reticulated shell will lead to the continuous collapse of the upper part, which leads to the continuous collapse of the whole structure, and the welding deformation can make the continuous collapse of the whole reticulated shell more obvious. Thus determining the influence of geometric defects and temperature shrinkage deformation on the anti-continuous collapse performance.

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