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All Journal JURNAL SAINS PERTANIAN EQUATOR TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Jurnal Teknik Elektro Bulletin of Electrical Engineering and Informatics Jurnal Agro Ekonomi Jurnal Teknologi Pertanian Journal of Engineering and Technological Sciences Journal of ICT Research and Applications Lisanuna: Jurnal Ilmu Bahasa Arab dan Pembelajarannya ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Bulletin of Electrical Engineering and Informatics Proceeding of the Electrical Engineering Computer Science and Informatics JURNAL PENGABDI Jurnal Nusa Sylva Jurnal Elektronika dan Telekomunikasi Lisanul Arab: Journal of Arabic Learning and Teaching Prosiding SNAST Jurnal Nasional Teknik Elektro dan Teknologi Informasi Makara Journal of Technology VISA: Journal of Vision and Ideas Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Jurnal Perikanan Akuatik Tropis: Journal of Tropical Aquatic Resource Management
Achmad Munir
Institut Teknologi Bandung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences

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Journal : Journal of ICT Research and Applications

 1 
Prediction Method for Rain Rate and Rain Propagation Attenuation for K-Band Satellite Communications Links in Tropical Areas Baso Maruddani; Adit Kurniawan; Sugihartono Sugihartono; Achmad Munir
Journal of ICT Research and Applications Vol. 8 No. 2 (2014)
Publisher : LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.res.appl.2014.8.2.1

Abstract

This paper deals with the prediction method using hidden Markov model (HMM) for rain rate and rain propagation attenuation for K-band satellite communication link at tropical area. As is well known, the K-band frequency is susceptible of being affected by atmospheric condition, especially in rainy condition. The wavelength of K-band frequency which approaches to the size of rain droplet causes the signal strength is easily attenuated and absorbed by the rain droplet. In order to keep the quality of system performance for K-band satellite communication link, therefore a special attention has to be paid for rain rate and rain propagation attenuation. Thus, a prediction method for rain rate and rain propagation attenuation based on HMM is developed to process the measurement data. The measured and predicted data are then compared with the ITU-R recommendation. From the result, it is shown that the measured and predicted data show similarity with the model of ITU-R P.837-5 recommendation for rain rate and the model of ITU-R P.618-10 recommendation for rain propagation attenuation. Meanwhile, statistical data for measured and predicted data such as fade duration and interfade duration have insignificant discrepancy with the model of ITU-R P.1623-1 recommendation.
Characterization of Series Iteration Log-periodic Fractal Koch Printed Antenna Equipped with Balun Unit Achmad Munir; Dida Tuhu Putranto; Heroe Wijanto
Journal of ICT Research and Applications Vol. 7 No. 3 (2013)
Publisher : LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.res.appl.2013.7.3.2 .7.3.2

Abstract

In this paper, characterization of log-periodic fractal Koch antenna in series iteration and equipped with balance-unbalance (balun) unit is investigated numerically and experimentally. The proposed antenna which is deployed an FR-4 Epoxy dielectric substrate using printed-antenna techniques is designed based on Koch fractal geometry in series iteration to minimize its transversal dimension. Since the proposed antenna is a balanced antenna type, then it requires a balun circuit to be available being fed from a coaxial type transmission line. Prior to realization and experimental characterization, some basic antenna parameters including VSWR, impedance characteristic, gain, and radiation pattern are investigated numerically to obtain the optimum architectural design. Moreover, the number of antenna elements as well as the effect of balun unit is also analyzed numerically. From the result, it shows that the proposed antenna has a dimension of 120mm x 150mm, working bandwidth from 0.7GHz"“2.6GHz for VSWR < 2, and overall gain of more than 6dB for frequency range > 1.6GHz.
Two-stage S-Band LNA Development Using Non-Simultaneous Conjugate Match Technique Achmad Munir; Yana Taryana; Mochamad Yunus; Hardi Nusantara; Mohammad Ridwan Effendi
Journal of ICT Research and Applications Vol. 13 No. 3 (2019)
Publisher : LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.res.appl.2019.13.3.3

Abstract

This paper presents the development of a two-stage low noise amplifier (LNA) operating at the S-band frequency that is implemented using the non-simultaneous conjugate match (NSCM) technique. The motivation of this work was to solve the issue of the gain of LNAs designed using the most commonly used technique, i.e. simultaneous conjugate match (SCM), which often produce an increase of other parameter values, i.e. noise figure and voltage standing wave ratio (VSWR). Prior to hardware implementation, the circuit simulation software Advanced Design System (ADS) was applied to design the two-stage S-band LNA and to determine the desired trade-off between its parameters. The proposed two-stage S-band LNA was deployed on an Arlon DiClad527 using a bipolar junction transistor (BJT), type BFP420. Meanwhile, to achieve impedances that match the two-stage S-band LNA circuit, microstrip lines were employed at the input port, the interstage, and the output port. Experimental characterization showed that the realized two-stage S-band LNA produced a gain of 22.77 dB and a noise figure of 3.58 dB at a frequency of 3 GHz. These results were 6.1 dB lower than the simulated gain and 0.76 dB higher than the simulated noise figure respectively.
A Decoupling Technique for Beamforming Antenna Arrays Using Simple Guard Trace Structures Zulfi Zulfi; Joko Suryana; Achmad Munir
Journal of ICT Research and Applications Vol. 17 No. 3 (2023)
Publisher : DRPM - ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.res.appl.2023.17.3.5

Abstract

This paper discusses decoupling techniques for suppressing electromagnetic coupling between elements of beamforming antenna arrays. Guard trace structures, which are commonly used for crosstalk reduction on printed circuit board technology, are proposed to be inserted between the array elements for coupling reduction. Two types of guard trace structures, i.e., straight guard traces and serpentine guard traces, were explored, and the effect of using via holes on both types of guard traces was studied. For this purpose, two-element antenna arrays with guard trace structures inserted between array elements were designed and simulated. The simulation results showed that a straight guard trace with vias (straight GTV) and a serpentine guard trace without vias (serpentine GT) could effectively reduce EM coupling between elements of array antennas. To verify the simulation results, prototypes of antenna arrays with straight GTV and serpentine GT were realized and measured. The measurement results showed coupling reductions of 5 dB and 6.4 dB could be achieved when straight GTV and serpentine GT are inserted between two array elements separated by edge-to-edge distances of 4 mm and 9.05 mm, respectively. Therefore, the proposed decoupling technique is suitable for beamforming antenna arrays with a very close distance between array elements.
Performance Evaluation of Fractal Wavelet Packet Transform on Wireless Communication Systems Mohammad Ridwan Effendi; Rheyuniarto Sahlendar Asthan; Achmad Munir
Journal of ICT Research and Applications Vol. 18 No. 1 (2024)
Publisher : DRPM - ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.res.appl.2023.18.1.3

Abstract

The performance of the phase shift keying (PSK) modulation technique over additive white Gaussian noise (AWGN) and multipath propagation channels generally becomes worse for higher-order modes. Therefore, a new modulation technique should be provided in order to have a system that is capable of transmitting data with higher efficiency while maintaining better performance at the same time. This paper presents the development of a fractal wavelet packet transform incorporated within the M-ary PSK system, namely M-ary PSK orthogonal wavelet division multiplexing (OWDM), which is proposed to obtain high performance of modulation in terms of spectrum efficiency and bandwidth resources intended for wireless communication systems. To demonstrate performance improvement over a Rayleigh frequency selective fading channel and in the presence of AWGN noise, the proposed system was evaluated and compared to the basic modulation system and M-ary PSK employing orthogonal frequency division multiplexing (OFDM). The performance results show that M-ary PSK OWDM had better performance in comparison with M-ary PSK OFDM and the conventional system. By utilizing 16 subcarriers, QPSK OWDM achieved bit error rate performance improvement from 1.5 × 10-3 to 1 × 10-4 for Eb/N0 of 20 dB with efficient bandwidth.
Analytical Approach to Parameter Determination in Kaiser Function for Power-weighted Antenna Array Design Hartuti Mistialustina; Chairunnisa Chairunnisa; Achmad Munir
Journal of ICT Research and Applications Vol. 17 No. 1 (2023)
Publisher : DRPM - ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.res.appl.2023.17.1.8

Abstract

Window methods that are frequently used in the design of finite impulse response filters are also applicable to antenna array designs. This paper explores the application of a Kaiser function in a power-weighted antenna array design, focusing on the determination of the Kaiser function’s β parameter. The determination, which includes the calculation, optimization, and validation of the β parameter, was carried out based on a specific configuration of a linear antenna array design. The observation of this exploration emphasized the suppression of the sidelobe level (SLL) and the width of main lobe (WML) performance. By changing the β parameter, the Kaiser function is capable of approximating different window methods, since it plays an important role in defining the set of weighting coefficients for a specifically targeted SLL. Kaiser function application in power-weighted antenna array designs with a linear arrangement indicates the need of β parameter optimization because of the disagreement between the obtained SLL and the targeted SLL. The optimized β parameter produced a smaller SLL error for even and odd numbers of elements. From the validation, the average SLL error percentage for a targeted SLL of 25 dB, 35 dB, and 45 dB was 6%, 4.31%, 6.10%, respectively.
Bandwidth Optimization of Spline-Based Planar Sensor Using GA, PSO, and CMA-ES for EMC Testing and Wireless Communications Prasetyo, Agus Dwi; Hamdani, Deny; Munir, Achmad
Journal of ICT Research and Applications Vol. 19 No. 1 (2025)
Publisher : DRPM - ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.res.appl.2025.19.1.5

Abstract

The expansion of communication technology and the increasing usage of the frequency spectrum drive the need for compatible device testing. Wideband antennas play a crucial role in supporting modern communication systems and applications, including those used as the sensors in electromagnetic compatibility (EMC) testing. Optimization techniques, such as genetic algorithm (GA), particle swarm optimization (PSO), and covariance matrix adaptation–evolution strategy (CMA-ES), are widely applied to enhance the bandwidth of electromagnetic devices. However, most studies focus on individual algorithms or limited comparisons, resulting in a lack of systematic evaluation within a unified framework. This paper fills that gap by directly comparing GA, PSO, and CMA-ES on the same planar sensor design, assessing their effectiveness in achieving the widest bandwidth. The planar sensor had a basic spline-based configuration using quadratic Bezier equation. A performance comparison based on a simulation showed that the planar sensor configuration with the best bandwidth was 17.77 GHz, spanning a frequency range from 2.23 GHz to 20 GHz, which was limited by the highest observation frequency of the available measuring instrument. Furthermore, verification of the realized planar sensor showed that the bandwidth reached 17.86 GHz, from 2.14 GHz to 20 GHz, with a geometric bandwidth of 273%.
Co-Authors -, Dedi Adit Kurniawan Aditia Nur Bakti Agus Dwi Prasetyo Aji, Galih Mustiko Anugerah Solida Anzani, Yunita Magrima Argya Harish Arief Budi Santiko, Arief Budi Asep Najmurrokhman Asthan, Rheyuniarto Sahlendar Atmosoemarto, Mulyadi Bambang Kurniadi, Bambang Bambang Setia Nugroho Baso Maruddani Biru Tutur Ranum Chairunnisa Chairunnisa Chairunnisa Chairunnisa Corio, Dean Dean Corio Dedi - Deny Hamdani Dessy Eka Rahayu, Ni Wayan Dida Tuhu Putranto Doddy Abdassah Dwi Mandaris Endon Bharata Erdilla Indriyani Folin Oktafiani, Folin Gerry Sasanti Nirmala H, Ali Fikri Bustanul Hadinta, Fitra Wira Hardi Nusantara Hardi Nusantara Harish, Argya Hartuti Mistialustina Haryo Dwi Prananto Heroe Wijanto Hobara, Yasuhide Iman Suswanto Joko Suryana Kusmadi, Kusmadi Kusnandar Kusnandar Larasati, Monica Levy Olivia Nur Maulana Randa Maulana, Muhammad Farhan Mia Maria Ulfah Mia Maria Ulfah Mochamad Yunus Mochammad Yunus, Mochammad Mohammad Ridwan Effendi Muassomah Muassomah Nababan, Gimhot Hasudungan Ni Wayan Dessy Eka Rahayu Nusantara, Hardi NUSANTARA, HARDI Nyankori, J. C.O. Purwiyanto Purwiyanto Radianto, Denny Oktavina Rahmadani, Novi Ramadhani, Uri Arta Randa, Maulana Retno Budi Lestari Rheyuniarto Sahlendar Asthan Rheyuniarto Sahlendar Asthan Rheyuniarto Sahlendar Asthan Rijadi, Bloko Budi Risky, Februarina Risma Safitri Roy B. V. B. Simorangkir Rozan, Hafiz Safitri, Risma Sapa, Michael Milon Saputra, Iqbal Dwi Selassie, H. M.G. Selviyani, Selviyani Shabrina, Nabila Husna Shita Fitria Nurjihan Sudjati Rachmat Sugihartono Sugihartono Sulaeman, Yaya Sulistyaningsih Sulistyaningsih Sunubroto Sunubroto Sureshwaran, S. Taryana, Yana Taufan Marhaendrajana, Taufan Teguh Firmansyah ULFAH, MIA MARIA Ummah, Vina Rohmatul Waryani, Waryani Wenda Adi Irawan Yamato, Yamato Yana Taryana Yana Taryana Yaya Sulaeman Yuli Arif Tribudi Yunus Arifien Zulfi Zulfi Zulfi Zulfi