Prasetiyono Hari Mukti

Bio: Prasetiyono Hari Mukti is an academic researcher from Sepuluh Nopember Institute of Technology. The author has contributed to research in topics: Return loss & Microstrip antenna. The author has an hindex of 4, co-authored 23 publications receiving 54 citations. Previous affiliations of Prasetiyono Hari Mukti include Delft University of Technology & Bandung Institute of Technology.

Design of substrate integrated waveguide based power divider for S-band applications

Abstract: In this paper, a SI W based power divider for S-band applications is proposed The proposed power divider is designed using Y-junction configuration on Rogers R04360 substrate with dielectric constant of 615 and substrate thickness of 152 mm The high dielectric constant substrate is selected for the sake of minimizing the dimension of power divider The proposed power divider is numerically analyzed in terms of return loss and output power equality Besides that, various characteristic of power divider is also investigated as an effect of different vias diameter of SIW and different types of transition structure Based on the numerical analysis, the proposed SIW based power divider demonstrates a good performance over the frequency range of 2–36 GHz with return loss less than −15 dB in the 2–24 and 27–36 GHz band The output power equality achieves 34 ± 02 dB approximately

A 2.3/3.3 GHz Dual Band Antenna Design for WiMax Applications

Abstract: A triangular-slot antenna with rectangular patch for 2.3/3.3 GHz WiMax applications has been implemented on DICLAD 527 substrate (relative permittivity er = 2.5) with 1.524 mm of substrate thickness. A rectangular patch printed on one side of the substrate is fed by a 50 Ω microstrip line and acts as the frequency tuning stub, while the triangular slot is positioned on the opposite side of the substrate, center lined to the rectangular stub. From the measurement results based on VSWR = 2 or equal to the return loss of 9.53 dB, at the lower band of 2.3 GHz the resulting impedance bandwidth is 290 MHz (from 2.16 to 2.45 GHZ) and at the upper band of 3.3 GHz is 370 MHz (from 3.31 to 3.68GHz), providing services for 2.3 GHz and 3.3 GHz frequency bands allocated for WiMax applications. The antenna gain measurement at 2.3 GHz frequency band is almost agrees with the simulation result of 3.2 dBi. While at 3.3 GHz the gain is approximately 4.4 dBi and continues to decrease with increasing frequency. The antenna gain measurement achieves maximum of 4.8 dBi (6 dBi from simulation) at about 3 GHz. The simulation and measurement results are evaluated and discussed.

MIMO radar waveform design using interleaved-OFDM technique

Abstract: Multiple-Input-Multiple-Output (MIMO) radar waveform design using orthogonal frequency division multiplexing (OFDM) signals is adapted from communication system. It can provide an excellent orthogonality that is required by MIMO radar transmitter. Another privilege of using OFDM signal is the flexibility in subcarrier allocation when multiple MIMO radar user is considered. This paper analyzed about the comparison of radar detection accuracy, and resolution of four OFDM MIMO radar waveforms, i.e. Conventional OFDM-MIMO radar waveform, and three types of interleaved technique which are different in the way of allocating the subcarrier frequency when multi user scenario is concerned. Interleaved OFDM waveforms that will be compared here are the model introduced by Wiesbeck et al, Yoke et al, and random subcarrier interleaving. The transmitted OFDM signal is designed in such a way that the multiple transmitters will only radiate at the unique subcarriers. In this paper, MUSIC algorithm is used to obtain the target angle of arrival (AoA) information and virtual array is applied to improve radar ability in multi targets detection that usually limited by the number of receiver antennas. Radar performance comparison will be discussed in terms of the target range, velocity and the AoA resolution, including their accuracy and sidelobe levels.

Comparison of array configuration for Antipodal Vivaldi antenna

Abstract: Single element of Vivaldi antenna, two, and four elements of Vivaldi antenna array in planar and h-plane configuration have been compared The single element antenna printed on a substrate with relative permittivity and thickness of 43 and 16 mm, respectively The single antenna dimension is 1203 mm × 872 mm, approximately The two and four elements of Antipodal Vivaldi antenna array designed using planar and h-plane array configuration The single element of Vivaldi antenna works at 3004 GHz frequency, with −10 dB bandwidth of 1507 GHz and gain of 5287dBi Both in planar and h-plane configuration, the two and four elements antenna will be compared to the single element antenna in order to investigate the effect of mutual coupling generated by other elements in array configuration The mutual coupling between elements may reduce the overall antenna performance, so that several configurations must be compared to minimize the mutual coupling effect Regarding to the simulation result, the two and four elements antenna in planar configuration work well at 25 GHz While in h-plane configuration, the two and four elements antenna work well at 30 GHz The shifting of operating frequency in two and four elements antenna using planar configuration caused by the distance between elements which increase the wavelength so that the antenna's operating frequency is shifting and become lower than the planar configuration

A Compact Wideband Fractal-Based Planar Antenna with Meandered Transmission Line for L-Band Applications

Abstract: In this paper, a development of compact wideband antenna for L-Band Applications is presented. The proposed antenna is developed based on Modified Sierpinski Based Fractal geometry for the antenna patch with additional meandered structure in the antenna transmission line. The designed antenna is printed on a 10 × 10 cm of substrate with a relative permittivity of 4.3 and thickness of 1.6 mm. The antenna is fed by a 50 Ω microstrip line. The proposed antenna is characterized both in numerical and experimental analysis. The antenna characteristics are analyzed in terms of return loss, bandwidth, antenna gain, radiation pattern and radiation efficiency. From the experimental analysis, the fabricated antenna exhibits reasonable agreement to numerical design. The proposed antenna has an operating frequency from 0.94 GHz to 2.25 GHz with the lowest return loss of �36 dB and maximum gain around 5.49 dBi, as well as radiation efficiency of 97%, approximately.

Software Defined Radio Architectures Systems And Functions

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Dielectric notch radiator antennas with integrated filtering for 5G and IoT access

Abstract: The development of dielectric notch radiator (DNR) antennas is described with integrated filters for 5G and IoT systems. The DNR is a type of tapered slot antenna (TSA) and is similar to the familiar Vivaldi antenna except that the length of the DNR is much shorter than a Vivaldi. The five step design process for the DNR is given and expands upon prior exponential taper design methods. The optimization and analysis of the microstrip to slot line section uses the finite element method (FEM). The DNR is used for a X-band antenna and line array. The single element simulated and measured return loss and antenna gain pattern are shown. The gain pattern for a four element line array is shown. The DNR is then used for an antenna system operating in the mobile phone and Wi-Fi bands. The antenna is integrated with filters to form a solution with application to 5G and internet of things (IoT) over Zigbee or Wi-Fi systems. The results demonstrate how the DNR antenna can be applied to solve wide band antenna design requirements where antenna length is an important design constraint.

Substrate-Integrated-Waveguide Power Dividers: An Overview of the Current Technology

Abstract: Power dividers are important components of microwave/millimeter wave (mm-wave) circuit design. This article provides a comprehensive review of the state-of-the-art substrate-integrated-waveguide (SIW) power dividers/combiners. SIW technology converts waveguide-like structures into planar form, compensates for the drawbacks of microstrip structures at higher-frequency circuit designs, and minimizes production complexity and costs compared to conventional waveguide structures. An overview of how traditional dividers have progressive adopted the SIW technique is presented and a comparative performance analysis of the divider types and practical paradigm show the future potential of SIW technology.

Perancangan layanan real time mobile tv pada jaringan wlan menggunakan protokol multicast

Abstract: Mobile TV merupakan teknologi yang menerapkan IPTV (Internet Protocol Television) pada smart phone atau gadget lainnya. IPTV merupakan teknologi yang memungkinkan komunikasi antara server dan client untuk menstreamingkan video siaran televisi digital secara real time melalui jaringan komputer lokal yang sudah terbangun. Dengan memanfaatkan jaringan WLAN (Wireless Local Area Network) yang tersedia di berbagai instansi, maka mobile TV bisa diimplementasikan menggunakan hotspot-hotspot yang tersedia. Sehingga dapat memberikan layanan mobile TV secara real time tanpa terkena beban biaya oleh operator telekomunikasi. Pada penelitian ini digunakan prinsip IP multicasting. Paket data dikirimkan kepada sekelompok client yang memang membutuhkannya. Dengan demikian data multimedia dikirimkan secara efisien melalui jaringan. Jumlah client yang banyak tidak akan membebani server, karena server hanya mengirimkan satu paket untuk semua client dan client yang tidak membutuhkan paket multicast tidak akan menerima paket ini. Berdasarkan hasil pengukuran kualitas layanan (QoS) real time mobile TV yang dilakukan pada 1 client, 2 client, dan 3 client didapatkan nilai packet loss paling besar adalah 3 %, nilai delay paling besar adalah 6,02439 ms dan mengalami peningkatan seiring bertambahnya client, nilai jitter paling besar adalah 2,036608 ms, nilai throughput mengalami penurunan seiring bertambahnya client yang mengakases layanan real time mobile TV dan nilai throughput paling kecil adalah 1,808 Mbps. Sehingga semua parameter kualitas layanan hasil pengukuran adalah kategori baik sesuai dengan standar ITU-T. Kata Kunci : mobile TV, real time, video streaming, WLAN, multicast, QoS

An investigation of dual-band dual-squarering (dsr) based microstrip antenna for wifi/wlan and 5g-nr wireless applications

Abstract: In this work, a compact planar dual-square ring (DSR) microstrip patch antenna is investigated to acquire dual-band resonance with dual-mode excitation for Wi-Fi/WLAN and 5G-NR based wireless applications. This dual-square ring geometry is employed on single layer dielectric, excited through EM coupling by using a quadrilateral feed patch, which offers massive flexibility in impedance matching for dual-band resonance with minimum coupling effects in common excitation and ground plane. This planar DSR structure shows the resonance at 2.4 GHz and 3.7 GHz frequency bands with bandwidths greater than 100 MHz and 200 MHz, respectively and a maximum gain response of 4.3 dBi with VSWR of 2. Here the simulation results are verified through experimental results of the fabricated antenna. This proposed antenna design can be configured for Wi-Fi/WLAN application at 2.4 GHz in lower-order resonance mode (TM01) and for 5G-NR application by utilizing the fringing benefits of higher-order mode (TM10) at 3.7 GHz.