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All Journal 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

Achmad Munir

Institut Teknologi Bandung

Author-ID : 325150

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management 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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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

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

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.

Perancangan Low Noise Amplifier dengan Teknik Non Simultaneous Conjugate Match untuk Aplikasi Radar S-Band Yana Taryana; Achmad Munir; Yaya Sulaeman; Dedi -
Jurnal Elektronika dan Telekomunikasi Vol 15, No 2 (2015)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v15.45-49

Radar merupakan sistem pemancar dan penerima gelombang elektromagnetik untuk mendeteksi, mengukur jarak dan membuat peta benda benda seperti pesawat terbang, kapal laut, kendaran bermotor dan informasi cuaca. Salah satu kendala yang dihadapi pada sistem radar adalah sinyal pantulan yang memiliki daya yang rendah sehingga kualitas penerimaan menjadi kurang baik. Untuk mengatasi kendala tersebut dibutuhkan penguat daya pada sistem penerima yaitu Low Noise Amplifier (LNA). Oleh karena itu, tulisan ini memaparkan perancangan LNA dengan menggunakan teknik Non Simultaneous Conjugate Match (NSCM) untuk aplikasi radar S-Band. Teknik ini memberikan kemudahan dalam menentukan nilai trade off (TO) untuk nilai gain, noise figure (NF) dan Voltage Standing Wave Ratio (VSWR) yang diinginkan. Dalam proses perancangannya, perangkat lunak Agilent Design System (ADS) 2011 digunakan untuk mendapatkan hubungan antara lingkaran gain, lingkaran NF, lingkaran VSWR, dan lingkaran mismatch factor (M). Dari hubungan tersebut diperoleh nilai impedansi masukan dan keluaran dari komponen aktif. Dalam tulisan ini, LNA dirancang dua tingkat untuk mendapatkan penguatan yang tinggi. Masing-masing tingkat menggunakan komponen aktif BJT BFP420 dengan penguatan dirancang sebesar 13,50 dB untuk tingkat pertama dan kedua, dan M sebesar 0,98. Sedangkan untuk saluran penyesuai impedansinya menggunakan substrat teflon fiberglass DiClad527. Hasil simulasi menunjukkan karakteristik LNA pada frekuensi 3 GHz yaitu gain sebesar 28,80 dB, NF sebesar 2,80 dB, VSWRin sebesar 1,05 dan VSWRout sebesar 1,1.

ANALYSIS MEASUREMENT OF RELATIVE PERMITTIVITY ON THE TEXTILE MATERIALS USING CAVITY REFLECTION TRANSMISSION PERTURBATION Wenda Adi Irawan; Levy Olivia Nur; Bambang Setia Nugroho; Achmad Munir
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

The information characteristic of dielectric material is one of important properties in design of wearable absorber. The studies were also performed to investigate the EM properties of textile materials when being exposure by EM waves especially for wearable absorber application. This is because the effects of EM waves emitted from electronic equipment on human health being a current problem to solve. In this paper, the analysis measurement of relative permittivity of textile materials is focused based on cavity reflection transmission perturbation method. The cavity perturbation method has difficulties to measure the objects like cuts the textile into a smaller piece than measurement device but has good accuracy. While transmission reflection method is easy to measure however has less accurate. The method that uses combination from reflection transmission method, cavity perturbation method and a rectangular waveguide which has high accuracy. According to textile relative permittivity measurement, the proposed method is numerical analyzed and then experimental inspected for some known dielectric materials. From the result of measurement relative permittivity for some textile materials has specific characteristic depend on each textiles and can be used as reference to design absorber. It show the proposed method is compatible for measure the textile characteristics in design antennas, reflectors, especially for wearable absorber.

Rancang Bangun Filter Bandpass Mikrostrip Pita Sangat Lebar Berbasis Defected Ground Structure Shita Fitria Nurjihan; Achmad Munir
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 9 No 1: Februari 2020
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Along with the rapid development of technology, many techniques have been employed to improve filter performance by using microstrip, one of them is using a Defected Ground Structure (DGS) technique. The DGS is a technique implemented by combining various forms of slot on the ground-plane of filter. This paper presents an ultra wideband (UWB) filter designed using DGS technique by combining two kind of slots on the ground plane, i.e., rectangular slot and rectangular ring slot. The design of composed filter is initialized using filter without DGS, then by adding two kinds of DGS on the ground plane. The DGS is used to improve S-parameter values and increase bandwidth. The method of filter design is using several parametric studies, such as changing the length of patch, width of patch, number of rectangular slot, length of rectangular slot, width of rectangular slot, and gap in rectangular ring slot. This filter is fabricated on a FR4 epoxy dielectric substrate with the thickness of 0.8 mm and the size of 27.4 mm x 22 mm. The measurement result shows that the filter could produce the working bandwidth of 4.01 GHz in the frequency range from 1.52 GHz to 5.53 GHz.

Antena SIW dengan Defected Ground Structure pada Frekuensi L-Band Mia Maria Ulfah; Achmad Munir
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 9 No 2: Mei 2020
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

In this paper, a bandwidth enhancement technique for Substrate Integrated Waveguide(SIW) antenna is attempted using Defected Ground Structure(DGS)by modifying the shape and geometry of the slot on the ground plane. In order to achieve wide bandwidth response of the antenna, a rectangular split ring incorporated with across shapes lots are employed as DGS. The quality factor (Q) of antenna increases as the substrate thickness decreases, which leads to narrow down bandwidth response of the SIW antenna. Therefore, the SIW antenna is simulated using multiple layers of FR4epoxydielectric substrate in overcoming the problem. The SIW antenna has a dimension of 171 mm×160.5mm, 4.905mm-height,and is intended to work at the center frequency of 2 GHz. Furthermore, the SIW antenna is excited by proximity coupling method which is connected to a 50Ω connector. Simulation result shows that the 575 MHz bandwidth could be achieved by the antenna with the proposed technique, in which the -10dB bandwidth response is ranged from the frequency of 1.675 GHz –2.25 GHz and the maximum gain is6.03 dBi at the frequency of 1.85 GHz,with bidirectional radiation pattern.

Implementasi Struktur Meander Line untuk Mereduksi Ukuran Butler Matrix 2 × 2 Zulfi; Achmad Munir
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 10 No 2: Mei 2021
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Butler matrix is a beamforming network that is commonly used in multibeam antennas because of its simple structure and high efficiency. However, the Butler matrix has relatively large dimensions. Meander line structure is a widely used approach to reduce the dimensions of various microwave devices. This paper describes the implementation of the meander line structure on a 2 × 2 Butler matrix to reduce dimensions. The method used is to apply a meander line structure to the through arm. The 2 × 2 Butler matrix with meander line structure is designed using FR4 epoxy dielectric material with dimensions of 17.9 mm × 36.4 mm to work at a 2.4 GHz resonant frequency. The measurement results show that the 2 × 2 Butler matrix with meander line structure has a reflection coefficient better than -10 dB from 1.88 GHz to 2.93 GHz (fractional bandwidth of 43.75%). The isolation of -6.15 dB, the transmission coefficients of -3.70 dB, and the phase difference between the output ports is 91.37o were achieved at the operating frequency of 2.4 GHz. The application of the meander line structure reduces the dimensions of the Butler matrix 2 × 2 by 34.54%.

Antena Ring Sirkular dengan Kemampuan Penekanan Higher Order Mode Rheyuniarto Sahlendar Asthan; Achmad Munir
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 8 No 4: November 2019
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1119.533 KB)

This paper presents the development of a circular ring-shaped antenna with ability to suppress higher order mode. An S-shaped is added into the ring in order to satisfy the goal of the antenna development. The upper and lower edges of the ring are excited differentially using two ports in order to have symmetrical radiation pattern. Each port is directly connected to a 50 Ω SMA connector using microstrip feeding line. The antenna is designed with an FR4 dielectric substrate with the dimension of 85.4 mm × 85.4 mm and intended to work at the center frequency of 0.9 GHz. The proposed antenna is compared with the conventional circular ring-shaped antenna to observe the antenna performances in term of higher order mode suppression. In addition, optimization is carried out by varying physical antenna parameters. The measurement result shows that circular ring-shaped antenna with S-shaped element can suppress the higher order mode frequency of 19.55 dB and work properly at the desired frequency of 0.9 GHz. The measured impedance bandwidth for the reflection coefficient (S11) below −10 dB is 251 MHz with fractional bandwidth (fBW) of 27.89%. The symmetrical radiation pattern in E-plane with maximum power density at the boresight is obtained at the frequency of 0.9 GHz and 1.94 GHz. The measured 3 dB beamwidths of 0.9 GHz and 1.94 GHz in E-plane are 99.4o and 100.5o, respectively.

3D FDTD Method for Modeling of Seismo-Electromagnetics Disturbance on Crustal Earth Shabrina, Nabila Husna; Hobara, Yasuhide; Munir, Achmad
Makara Journal of Technology Vol. 23, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

The paper deals with the modelling of seismo-electromagnetics disturbance on the crustal earth by use of threedimensional (3D) finite-difference time-domain (FDTD) method. The model is built up by discretizing the frontier geographical region between Java Island and Sumatra Island in a cylindrical coordinate system-based 3D object. The proposed method is applied to compute and analyze electromagnetics (EM) fields of the observed very low frequency (VLF) wave used for the investigation. Boundary condition of uniaxial perfectly matched layer (UPML) are applied surrounding the area of computation for truncating the object of simulation. The investigation are focused on the propagation time of observed VLF wave and its amplitude variation between the observation point and disturbance pulse. The result shows that the propagation time is significantly affected by the distance of observation point and the permittivity of propagation medium. Meanwhile, the addition pulse associated with the earthquake influences the amplitude of observed VLF wave instead of its frequency.

Design and Optimization of Discone Antenna for Medical Device Electromagnetic Interference Measurement Haryo Dwi Prananto; Dwi Mandaris; Aditia Nur Bakti; Achmad Munir
Jurnal Teknik Elektro Vol 15, No 1 (2023): Jurnal Teknik Elektro
Publisher : Jurusan Teknik Elektro, Fakultas Teknik, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v15i1.39688

The wide spread of the Internet of Things creates the possibility of electromagnetic interference in medical devices. Therefore, it is necessary to perform risk mitigation by finding the value of electromagnetic interference through measurements using wideband and omnidirectional antennas, e.g., the discone antenna. In this research, the optimization of the S11 value of a designed discone antenna was obtained using simulation from the effect of dimensional variations in discone parameters like disc diameter, cone bottom diameter, gap, and cone height on S11 characteristics. The parameters were combined for optimization. The design was fabricated, and the S11, radiation pattern, gain value and antenna factor, and the ability to measure interference through modeling were measured. Gain value and antenna factor were obtained using the gain-comparison method, which compared the antenna of interest against another antenna with a standard gain. The optimization was successfully performed with a better S11 value. At 5.2 GHz, the value of S11 was below -10 dB. The realization of the design showed similar results to the simulation, and it was found to be able to operate in the medical device frequency range (wideband). The ability of the discone antenna improved in terms of S11 value, especially at 5.2 GHz, where the value was below -17.443 dB. The radiation pattern of the designed antenna is omnidirectional. Additionally, validation was carried out by providing gain value and antenna factor. It has been proved that the designed discone antenna could measure interference successfully by modeling interference sources as electric field sources from all directions.

Co-Authors -, Dedi Adit Kurniawan Aditia Nur Bakti Agus Dwi Prasetyo Aji, Galih Mustiko Anugerah Solida 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 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 Mia Maria Ulfah Mia Maria Ulfah Mochamad Yunus Mohammad Ridwan Effendi Muassomah Muassomah Ni Wayan Dessy Eka Rahayu NUSANTARA, HARDI Nusantara, Hardi Nyankori, J. C.O. Purwiyanto Purwiyanto Radianto, Denny Oktavina Ramadhani, Uri Arta Randa, Maulana Retno Budi Lestari Rheyuniarto Sahlendar Asthan Rheyuniarto Sahlendar Asthan Rheyuniarto Sahlendar Asthan Risky, Februarina Risma Safitri Roy B. V. B. Simorangkir Rozan, Hafiz Safitri, Risma Sapa, Michael Milon Saputra, Iqbal Dwi Selassie, H. M.G. Shabrina, Nabila Husna Shita Fitria Nurjihan Sudjati Rachmat Sugihartono Sugihartono Sulaeman, Yaya Sulistyaningsih Sulistyaningsih Sunubroto Sunubroto Sureshwaran, S. Taryana, Yana Taufan Marhaendrajana, Taufan ULFAH, MIA MARIA Ummah, Vina Rohmatul Wenda Adi Irawan Yana Taryana Yana Taryana Yaya Sulaeman Yuli Arif Tribudi Yunus Arifien Zulfi Zulfi Zulfi Zulfi

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