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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
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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Journal : TELKOMNIKA (Telecommunication Computing Electronics and Control)

 1 
High Sensitivity Very Low Frequency Receiver for Earthquake Data Acquisition Achmad Munir; Kusmadi Kusmadi; Kusnandar Kusnandar; Asep Najmurrokhman; Chairunnisa Chairunnisa; Sunubroto Sunubroto
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 15, No 1: March 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v15i1.3484

Abstract

A high sensitivity very low frequency (VLF) receiver is developed based on AD744 monolithic operational amplifier (Op-Amp) for earthquake data acquisition. In research related natural phenomena such as atmospheric noise, lightning and earthquake, a VLF receiver particularly with high sensitivity is utterly required due to the low power of VLF wave signals received by the antenna. The developed receiver is intended to have high sensitivity reception for the signals in frequency range of 10-30 kHz allocated for earthquake observation. The VLF receiver which is portably designed is also equipped with an output port connectable to the soundcard of personal computer for further data acquisition. After obtaining the optimum design, the hardware realization is implemented on a printed circuit board (PCB) for experimental characterization. It shows that the sensitivity of realized VLF receiver is almost linear in the predefined frequency range for the input signals lower than -12dBm and to be quadratic for the higher level input signals.
Hybrid De-embedding Technique for Microwave Absorber Characterization Achmad Munir
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 9, No 1: April 2011
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v9i1.679

Abstract

In this paper, a data processing technique to obtain the true characteristic of microwave absorber material characterization is proposed. This technique addressed to overcome the limitations of port extension is known as hybrid de-embedding technique, which in principle is carried out by combining the structure model data of test fixture that is used with simulated data or experimental measurements. In this technique, the test fixture is simulated numerically to get S (scattering) parameter data. Then the S parameter is converted into the T parameter (transfer) to be used for de-embedding process by removing the characteristic of test fixture used so that the true characteristics of a microwave absorber material can be revealed. To verify the accuracy of technique proposed, the characteristics of a microwave absorber is simulated numerically and measured experimentally. The simulation and measurements results are then processed using the proposed technique to be compared with its ideal model. In general, the result of de-embedding process shows that the proposed technique has high accuracy.
Numerical Design of Ultra-Wideband Printed Antenna for Surface Penetrating Radar Application Roy B. V. B. Simorangkir; Achmad Munir
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 9, No 2: August 2011
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v9i2.706

Abstract

Surface penetrating radar (SPR) is an imaging device of electromagnetic wave that works by emitting and transmitting a narrow period pulse through the antenna. Due to the use of narrow period pulse, according to the Fourier transform duality, therefore ultra-wideband (UWB) antenna becomes one of the most important needs in SPR system. In this paper, a novel UWB printed antenna is proposed to be used for SPR application. Basically, the proposed antenna is developed from a rectangular microstrip antenna fed by symmetric T-shaped. Some investigation methods such as resistive loading, abrupt transition, and ground plane modification are attempted to achieve required characteristics of bandwidth, radiation efficiency, and compactness needed by the system. To obtain the optimum design, the characteristics of proposed antenna are numerically investigated through the physical parameters of antenna. It is shown that proposed antenna deployed on an FR-4 Epoxy substrate with permittivity of 4.3 and thickness of 1.6mm has a compact size of 72.8mm x 60.0mm and a large bandwidth of 50MHz-5GHz which is suitable for SPR application.
Self Oscillating Mixer with Dielectric Resonator for Low Noise Block Application Achmad Munir; Endon Bharata
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 9, No 2: August 2011
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v9i2.707

Abstract

In this paper, the development of a self oscillating mixer (SOM) as part of a low noise block (LNB) for a satellite television receiver is investigated numerically and experimentally. In contrast to other mixers, the developed SOM requires no separate local oscillator as it generates own local oscillator signal. The SOM is developed using a monolithic microwave integrated circuit (MMIC) comprised of two bipolar transistors coupled as a Darlington pair and a dielectric resonator to establish a local oscillator signal. The SOM is designed to oscillate at 3.62GHz driven from 50W signal generator. The prototype of SOM is fabricated on a dielectric substrate of glass-reinforced hydrocarbon/ceramic lamination (RO4350B) board which has a thickness of 0.762mm and relative permittivity of 3.66. The prototype is then characterized experimentally and exhibits a conversion gain of 8dB with the input and output voltage standing wave ratio (VSWR) less than 2 across the 2520MHz to 2670MHz operating frequency band.
Single Stage RF Amplifier with High Gain for 2.4GHz Receiver Front-Ends Achmad Munir; Biru Tutur Ranum
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 12, No 3: September 2014
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v12i3.100

Abstract

The paper deals with the numerical and experimental development of single stage radio frequency (RF) amplifier with high gain for 2.4GHz receiver front-ends. The work is motivated by the increasing demand of high-gain receiver amplifier in low-cost especially for wireless local area network (WLAN) application. Prior hardware realization and experimental characterization, the proposed amplifier which uses a single RF transistor of BFP420 type is numerically designed using ADS® software to satisfy the required specification. To obtain the impedance matching at ports of amplifier, microstrip lines are employed at the input and output ports. The prototype of amplifier is realized by use of a dielectric substrate of glass-reinforced epoxy lamination (FR4) board which has thickness of 0.762mm and relative permittivity of 4.3. The prototype is then experimentally characterized and demonstrates the gain of 13.35dB at frequency of 2.4GHz with the noise figure of 3.33dB, the input and output voltage standing wave ratio (VSWR) of 2.08 and 2.55, respectively.
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