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27,544 Article Results

A New Compact and Wide-band Band-stop Filter Using Rectangular SRR

10.12928/telkomnika.v16i1.7578
B.; Hassan 1st University Nasiri , A.; Hassan 1st University Errkik , J.; Microwave Group ESEO Angers Zbitou , A.; Hassan 1st University Tajmouati , L. El; Hassan 1st University Abdellaoui , M.; Hassan 1st University Latrach
This paper proposes a novel compact band-stop filter based on Rectangular SRR unit cell. The BSF structure consists of modified microstrip line connected to 50 Ω feed line on both sides and Rectangular-SRR which has been added and located in the center of the proposed design. The R-SRR dimensions are chosen and optimized in order to achieve a resonant frequency in the undesired band. This filter is designed, simulated and optimized using two electromagnetic solvers. The circuit performances have been investigated and found to have an excellent BSF characterized by high power rejection level in the stop-band, low insertion loss in the both pass-bands and compact size. The experimental results illustrate that the proposed BSF achieves a wide fractional bandwidth of 72 % at 2.2GHz.
Volume: 16
Issue: 1
Page: 110-117
Publish at: 2018-02-01

Energy Monitoring System to Display on Web Page Using ESP8266

10.11591/ijeecs.v9.i2.pp286-288
P Veerakumar
The Concepts of the Internet of Things associated with different applications running from home motorisation to habitual IoT, Where partner physical things, from wherever through a system. This will give incite access to information about the physical world and the articles in it provoking imaginative organisations and augmentation in capability and productivity. The framework proposes to build up an IoT based Interactive Industrial Home remote framework, Energy administration framework and inserted information obtaining frame to show on site page utilising GPRS, SMS and E-mail caution. Give them a chance to take a dynamic part of the Internet, trading data about themselves and their environment.  It is wanted to style a re-configurable sensible gadget interface for mechanical WSN in IoT climate, amid which ARM  received as the centre controller. Along these lines, it will filter data in parallel and continuously with rapid on many unique gadget data. Astute gadget interface particular is received for this style. The gadget consolidated with the latest ARM programmable innovation and savvy gadget determination. By recognising the estimations of sensors it can effortlessly discover the Temperature, Smoke, and Fire introduce in the mechanical condition on the Website, and we can deal with any circumstance from anyplace on the planet through IOT. This gadget is primary for sensor information accumulation and controlling of the new Home Wireless Sensor Networks (WSN) in the Internet of Things (IoT) condition. Preventive measures are effectively actualised to avoid problems.
Volume: 9
Issue: 2
Page: 286-288
Publish at: 2018-02-01

Frontalis Muscle Strength Calculation Based On 3D Image Using Gray Level Co-occurrence Matrix (GLCM) and Confidence Interval

10.12928/telkomnika.v16i1.6490
Hardianto; Universitas Muhammadiyah Malang Wibowo , Eko Mulyanto; Institut Teknologi Sepuluh Nopember Yuniarno , Aris; Universitas Brawijaya Widayati , Mauridhi Hery; Institut Teknologi Sepuluh Nopember Purnomo
One of the effects of the disorders of nervus VII (n. Facialis) is the damage of facial muscle. The research is needed in order to detect or as the therapies aids on the damage of the VII nerve by measuring the strength of maximum contraction, to help a therapy or detect the damage which caused by the decreasing of the VII nerve function. These measurement is taken from the difference on myofibrin when the contractions, because when the contraction happen, the myofibrin will distend and the difference can be detected as the strength of contraction. From the result of the comparison, EMG with the test result is the shift muscle movement amount of 1.367 up to 4.460. The mean value of rest muscle is in the range of 0.635 with interval at+0.463, on the move muscles the mean value of the muscle moving is in the range of 3,563 with interval at+1,069. This test is linear with the data EMG.
Volume: 16
Issue: 1
Page: 368-375
Publish at: 2018-02-01

A Dual-band Microstrip Slotted Antenna for UHF and Microwave RFID Readers

10.12928/telkomnika.v16i1.7310
Ahmed El; Hassan 1st University Hamraoui , El Hassane; Hassan 1st University Abdelmounim , Jamal; Hassan 1st University Zbitou , Laarbi; Hassan 1st University Elabdellaoui , Hamid; Moulay Ismail University, Meknes Bennis , Mohamed; Microwave Group Latrach
In this paper a new and simple dual-band microstrip slot antenna design combined with two inverted L-shaped slots integrated in the radiating patch is presented. This antenna is suitable for operating at 915 MHz and 2.45 GHz in order to cover the Radio Frequency Identification (RFID) frequencies bands. By optimizing the structure design, good performances in term of return loss radiation pattern and efficiency are achieved. The simulation results were obtained by using ADS and CST Microwave Studio electromagnetic solvers. The proposed antenna is mounted on an FR4 substrate with dielectric permittivity constant 4.4, thickness of 1.6 mm and loss tangent of 0.025 and a total area of 48×47 mm2. The design methodology used to achieve the dual-band antenna and both experimental, simulated results are presented.
Volume: 16
Issue: 1
Page: 94-101
Publish at: 2018-02-01

Macro-Bending Loss of Single-Mode Fiber Beyond Its Operating Wavelength

10.12928/telkomnika.v16i1.6666
Dwi; Indonesian Institute of Sciences (LIPI) Bayuwati , Tomi Budi; Indonesian Institute of Sciences (LIPI) Waluyo
A standard telecommunication-grade single-mode optical fiber is designed to have a low macro-bending loss in its entire operating wavelengths to comply with the ITU-T Recommendation G.652. In this paper, we described the potential use of such a fiber as an intensity-based sensor due to the macro-bending loss as an alternative to using a bending-sensitive fiber. We calculated the macro-bending loss of several single-mode optical fiber patchcords using the classical Marcuse equation at several wavelengths, and measured its transmission loss due to bending using an optical spectrum analyzer. For each type of fibers there is a wavelength with a significant macro-bending loss of the LP11 mode when the V-number of the fiber lies between 2.4 and 4, and that of the LP01 mode when the V-number of the fiber lies between 1 and 2.4. This work shows a thorough mathematical and experimental analysis for the posibility in using standard telecommunication fibers for intensity based-fiber sensor taking the benefit of bending loss phenomenon using commercial light sources.
Volume: 16
Issue: 1
Page: 142-150
Publish at: 2018-02-01

Structural and Optical properties of Multiwalled Carbon Nanotubes Modified by DBD Plasma at Atmospheric Pressure

10.12928/telkomnika.v16i1.5945
Norain; Universiti Teknologi Malaysia Sahari , Zolkafle; Universiti Teknologi Malaysia Buntat , Zulkifli; Universiti Teknologi Malaysia Azman , Zainuddin; Universitas Sriwijaya Nawawi , Muhammad Abu Bakar; Universitas Sriwijaya Sidik , Muhammad Irfan; Universitas Sriwijaya Jambak
Structure, chemical, and physical properties of Multiwalled Carbon Nanotubes (MWCNTs) after modification by dielectric barrier discharge (DBD) at atmospheric pressure is investigated using Transmission Electron Microscopy (TEM), Raman and Uv-vis-NIR spectroscopy. Effects of plasma treatment time on MWCNTs are analyzed. TEM result shows that during the short period of plasma treatment time of 5 minutes, the tube surface experienced a few damages. With increase in plasma treatment time, the tube surface is damaged to a certain extent. Intensity ratio, ID/IG through Raman analysis shows a good agreement with TEM. The values of ID/IG of the modified MWCNTs are larger than those of pristine MWCNTs. An increase of ID/IG indicates that considerable defects are produced on the surfaces of MWCNTs. The treated MWCNTs has energy band gap compared to zero band gap of untreated MWCNTs. It is believed that the defect site of MWCNTs can modify the electronics properties of MWCNTs from being metallic to semiconducting structure, which is applicable for almost all electronics device applications.
Volume: 16
Issue: 1
Page: 61-68
Publish at: 2018-02-01

High Frequency Transformer for Ship Electrical Power System

10.11591/ijeecs.v9.i2.pp347-350
AnuPriya K R , Sasilatha T
The system represented during this paper uses 3 matrix converters and a high frequency electrical device to attain isolation and voltage transformation from primary to secondary aspect. Two matrix converters manufacture high frequency voltage across a transformer, with open all over primary. a 3rd matrix device converts the high frequency cut voltage to line frequency. The non-idealities like outflow inductance of the electrical device have a big impact on the device performance. This paper studies the impact of outflow inductance on the regulation of the output voltage of the device. The simulation study has been carried out in SIMULINK and also the results are presented.
Volume: 9
Issue: 2
Page: 347-350
Publish at: 2018-02-01

Analysis of S2 (Spherical) Geometry Library Algorithm for GIS Geocoding Engineering

10.12928/telkomnika.v16i1.6985
Risma; Sekolah Tinggi Teknologi Jakarta Ekawati , Untung; Sekolah Tinggi Teknologi Jakarta Suprihadi
Geocoding is a common technique to transform address information into digital latitude/longitude format. One of the engineering conversions can be used is Google Maps based on S2 (Spherical) Geometry Library algorithm. This journal explains the quality analysis of the algorithm using geocoding quality matrix testing from hundreds of address data samples particularly on three cities in Indonesia-Jakarta, Bandung, and Balikpapan. However, the result of this research concludes that completeness of address information will affect its overall fourth matrix quality and the linkages of it such as transform success rate, landmark exactness, the score of accuracy and range of radius in meter.
Volume: 16
Issue: 1
Page: 334-342
Publish at: 2018-02-01

Computer Aided Diagnosis for Screening the Shape and Size of Leukocyte Cell Nucleus based on Morphological Image

10.11591/ijece.v8i1.pp150-158
Retno Supriyanti , Alfin Chrisanty , Yogi Ramadhani , Wahyu Siswandari
Hematology tests are examinations that aim to know the state of blood and its components, one of which is leukocytes. Hematologic examinations such as the number and morphology of blood generally still done manually, especially by a specialist pathologist. Despite the fact that today there is equipment that can identify morphological automatically, but for developing countries like Indonesia, it can only be done in the capital city. Low accuracy due to the differences identified either by doctors or laboratory staff, makes a great reason to use computer assistance, especially with the rapid technological developments at this time. In this paper, we will emphasize our experiment to screen leucocyte cell nucleus by identifying the contours of the cell nucleus, diameter, circumference and area of these cells based on digital image processing techniques, especially using the morphological image. The results obtained are promising for further development in the development of computer-aided diagnosis for identification of leukocytes based on a simple and inexpensive equipment.
Volume: 8
Issue: 1
Page: 150-158
Publish at: 2018-02-01

Adaptive Fuzzy PI Current Control of Grid Interact PV Inverter

10.11591/ijece.v8i1.pp472-482
R.S. Ravi Sankar , S.V. Jayaram Kumar , G. Mohan Rao
Now a day‟s, Photo Voltaic (PV) power generation rapidly increasing. This power generation highly depending on the temperature and irradiation. When this power interface with grid through the voltage source inverter with PI controller. Its gains should be updated due to the parametric changes for the better performance. In This Work Fuzzy Controller updates the gains of the proportional integral (PI)s Controller under variable parametric conditions. the gaines of the PI Controller are updated based on the error current and change in error current through the fuzzy controller. The error current in direct and quadrature frame are the Inputs to the PI controller. The PI Controller generates the reference voltage to the pulse width modulation technique. Here reference voltage is compared with the carrier signal to generate the pulses to the 3-Ph Inverter connected to the grid. This controller has given well dynamic response with less steady state error and also given The less THD of the grid current compared to the PI and Fuzzy controller.It Is implemented and verified in MATLAB Simulink.
Volume: 8
Issue: 1
Page: 472-482
Publish at: 2018-02-01

The Quality of the New Generator Sequence Improvent to Spread the Color System’s Image Transmission

10.12928/telkomnika.v16i1.6583
Mohamed; University of Science and Technology of Oran Krim , Adda; University of Sciences and Technology of Oran Algeria Ali Pacha , Naima; University of Science and Technology of Oran Hadj Said
This paper shows a new technic applicable for the digital devices that are the result of the finite’s effect precision in the chaotic dynamics used in the coupled technic and the chaotic map’s perturbation technics used for the generation of a Pseudo-Random Number Generator (PRNGs).The use of the pseudo- chaotic sequences coupled to the orbit perturbation method in the chaotic logistic map and the NewPiece-Wise Linear Chaotic Map (NPWLCM). The pseudo random number generator’s originality proposed from the perturbation of the chaotic recurrence. Furthermore the outputs of the binary sequences with NPWLCM are reconstructed conventionally with the Bernoulli’s sequences shifts map to change the shapes with the bitwise permetation then the results in simulation are shown in progress.After being perturbed, the chaotic system can generate the chaotic binary sequences in uniform distribution and the statistical properties invulnerable analysis. This generator also has many advantages in the possible useful applications of spread spectrum digitalimages, such as sensitive secret keys, random uniform distribution of pixels in Crypto system in secure and synchronize communication.
Volume: 16
Issue: 1
Page: 402-414
Publish at: 2018-02-01

A Novel Configuration of a Microstrip Microwave Wideband Power Amplifier for Wireless Application

10.12928/telkomnika.v16i1.7369
Amine; FST of Settat Hassan 1st University Settat Rachakh , El Abdellaoui; FST of Settat Hassan 1st University Settat Larbi , Zbitou; FST of Settat Hassan 1st University Settat Jamal , Ahmed; FST of Settat Hassan 1st University Settat Errkik , Abdelali; FST of Settat Hassan 1st University Settat Tajmouati , Latrach; Microwave Group Eseo Angers France Mohamed
RF/microwave power amplifier (PA) is one of the components that has a large effect on the overall performance of communication system especially in transmitter system and their design is decided by the parameters of transistor selected. This letter presents a new concept of a wide-band microwave amplifier using scattering parameters that is often used in the radio frequency communication systemas an application of the active integrated antenna[1- 2]. This power amplifier operates from 1.75 GHz to 2.15GHz frequency and it is based on AT-41410 NPN transistor that has a high transition frequency of 10GHz. The proposed Single Stage PA is designed by microstrip technology and simulated with Advanced Design System (ADS) software. The simulation results indicate good performances; the small power gain (S21) is changed between 11.8 and 10dB. For the input reflection coefficient (S11) is varied between -11 and -22.5dB. Regarding the output reflection coefficient (S22) is varied between -13.1 and -18.7dB over the wide frequency band of 1.75-2.15GHz and stability without oscillating over a wide range of frequencies.
Volume: 16
Issue: 1
Page: 224-231
Publish at: 2018-02-01

Comparative Study of Indoor Navigation Systems for Autonomous Flight

10.12928/telkomnika.v16i1.6814
Muhammad; University of Tabuk Ayaz
Recently, Unmanned Aerial Vehicles (UAVs) have attracted the society and researchers due to the capability to perform in economic, scientific and emergency scenarios, and are being employed in large number of applications especially during the hostile environments. They can operate autonomously for both indoor and outdoor applications mainly including search and rescue, manufacturing, forest fire tracking, remote sensing etc. For both environments, precise localization plays a critical role in order to achieve high performance flight and interacting with the surrounding objects. However, for indoor areas with degraded or denied Global Navigation Satellite System (GNSS) situation, it becomes challenging to control UAV autonomously especially where obstacles are unidentified. A large number of techniques by using various technologies are proposed to get rid of these limits. This paper provides a comparison of such existing solutions and technologies available for this purpose with their strengths and limitations. Further, a summary of current research status with unresolved issues and opportunities is provided that would provide research directions to the researchers of the similar interests.
Volume: 16
Issue: 1
Page: 118-128
Publish at: 2018-02-01

A Novel Design of a Miniature Metamaterial Antenna for RFID Reader Applications

10.12928/telkomnika.v16i1.8060
A.; Hassan 1st University Ennajih , J.; Hassan 1st University Zbitou , M.; Microwave Group (ESEO) Latrach , A.; Hassan 1st University Errkik , L.; Hassan 1st University EL Abdellaoui , A.; Hassan 1st University Tajmouati
In this article, we propose a novel design of a dual band antenna based metamaterial for RFID applications. The proposed antenna consists of a rectangular patch using inverted u-slot in radiating element and two split ring resonators loaded in the ground plane. The antenna is printed on an FR4 substrate having athickness of 1.6 mm, permitivitty of 4.4 and loss tanget of 0.025. this antenna is feed by a micostrip line having caracteristique of 50 Ohms. The designed antenna resonates at the UHF band around 900Mz with an input impedance of 87MHz and also, resonates at the ISM band around 2.45GHz with a large bandwidth about 516MHz. The designed antenna is simulated bys using CST and the results is validated by HFSS. After simulation, a prototype of the proposed antenna is fabricated, and the measured results show a good agreement with the simulated one.
Volume: 16
Issue: 1
Page: 174-181
Publish at: 2018-02-01

High-precision Ultrasonic Flowmeter for Mining Applications based on Velocity-area

10.12928/telkomnika.v16i1.5185
Lili; Shandong University of Science and Technology Zhang , Lenian; Shandong University of Science and Technology Xu , Laxmisha; Shandong University of Science and Technology Rai
The flowmeter is widely used in coal mining because of its higher measurement precision and simple installation without channel project modification. In this paper, a flow measurement method based on velocity-area is investigated, and a functional flowmeter for mining applications with higher precision is designed. The two key parameters, the liquid level and flow velocity are required to be obtained for achieving the proposed method. The proposed flowmeter is composed of three main functional modules: (1) flow velocity detection module based on ultrasonic time difference method, (2) liquid level detection module, and (3) mud level detection module based on ultrasonic pulse echo method. All the measured data are transferred to the monitoring station for analysis and displayed in real-time through M-BUS. The flowmeter is designed focusing on mining applications, and has higher benefits for preventing water disasters in coal mines
Volume: 16
Issue: 1
Page: 84-93
Publish at: 2018-02-01
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