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All Journal Bulletin of Electrical Engineering and Informatics ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Jurnal Penelitian Pendidikan IPA (JPPIPA) Makara Journal of Technology International Journal of Electrical, Computer, and Biomedical Engineering (IJECBE) Journal of Robotics, Automation, and Electronics Engineering
Eko Tjipto Rahardjo
Universitas Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics

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Development of a Wearable Wide band Antenna in the Frequency Range of 2.4 GHz and 5.2 GHz Soares, Fidelio; Eko Tjipto Rahardjo
International Journal of Electrical, Computer, and Biomedical Engineering Vol. 2 No. 3 (2024)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62146/ijecbe.v2i3.51

Abstract

This paper presents the optimization and design of a wearable multiband microstrip patch antenna using jeans as a substrate material for wireless communication applications. The proposed antenna operates at 2.4 GHz, 5.2 GHz, and 5.6 GHz frequency bands, which are essential for Wi-Fi and other wireless standards. The antenna design incorporates a rectangular slot and patch to achieve triple-band operation with a full ground plane, ensuring good isolation, directional radiation patterns, and high gain. Simulations and measurements were conducted using CST STUDIO SUITE software and standard laboratory equipment to validate the antenna's performance. Results demonstrate return losses greater than -10 dB with bandwidths of 72.5 MHz, 169.1 MHz, and 127.7 MHz for each band, respectively. The antenna achieves gain values of 0.886 dBi, 6.38 dBi, and 5.27 dBi for the 2.4 GHz, 5.2 GHz, and 5.6 GHz bands. Flexibility tests confirm the antenna's suitability for wearable applications, maintaining performance despite bending. The proposed antenna shows significant potential for integration into wearable devices, providing a reliable and efficient solution for modern wireless communication needs.
Rotman Lens Size Reduction by Using Same-Size Double Rectangular Defected Ground Structures (DGSs) Method or Same-Size Double Rectangular Slots Method Rizky Hidayat Prasetyo; Eko Tjipto Rahardjo
Journal of Robotics, Automation, and Electronics Engineering Vol. 2 No. 1 (2024): March 2024
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jraee.v2i1.555

Abstract

The need for dedicated communication keeps increasing. A technique to realize that is by using multibeam radiation. A Beamforming Network (BFN) is required to enable multibeam capability in array antennas. This study uses the Rotman Lens as BFN in the frequency of S-Band. The common problem with using Rotman Lens is that its conventional design size is quite large, mainly due to its transition leg ports. Transition leg ports are important to ensure the matching impedance between the lens and the array antenna ports the lens and the beam ports or the lens and the dummy port. The goal of this study is to reduce the size of Rotman lens transition legs by implementing simple and uniform size of slots or Defected Ground Structures (DGSs) methods for the ports of the Rotman Lens BFN. The method can minimize the length of the transition leg and allow the BFN to operate efficiently. The results revealed that the use of the same double-rectangular DGS technique and the same double-rectangular slots in ports can reduce the size of the Rotman lens. Compared to the conventional methods, the proposed method can reduce the size to almost 85 percent from its original size for this S-Band implementation. The other performances of the BFN, besides the size reduction, are not degraded by implementing the proposed methods.
Peningkatan Bandwidth dan Gain Antena Mikrostrip Leaky Wave dengan Multi Slot untuk Aplikasi WLAN IQBAL, MUHAMAD WAHYU; ZULKIFLI, FITRI YULI; RAHARDJO, EKO TJIPTO
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 10, No 2: Published April 2022
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v10i2.432

Abstract

ABSTRAKPenelitian ini menggunakan antena microstrip leaky wave dengan menambahkan dua slot, yaitu E-slot dan U-slot ganda atau multislot pada frekuensi 6 GHz (5,925 GHz-6,425 GHz) untuk aplikasi WLAN. E-slot dan U-slot ganda digunakan untuk meningkatkan performa dari gain dan bandwidth. Hasil dari simulasi memberikan informasi antena mikrostrip leaky wave dengan penambahan E-slot dan U-slot atau multislot diperoleh hasil s-parameter memiliki nilai -23,196 dB, VSWR sebesar 1,164, bandwidth sebesar 615 MHz, dan gain sebesar 6,16 dBi. Hasil simulasi dari antena mikrostrip leaky wave dengan penambahan E-slot dan U-slot ganda atau multislot menunjukkan dapat meningkatkan bandwidth sebesar 130,038 % dan meningkatkan gain sebesar 34,15 % dibandingkan dengan antena leaky wave tanpa penambahan E-slot dan U-slot ganda.Kata kunci: Mikrostrip Leaky Wave, Multislot, Bandwidth, Gain ABSTRACTIn this study used microstrip leaky-wave antenna by adding, E-slot and double U-slot or multi-slot at frequency of 6 GHz (5,925 GHz – 6,425) for WLAN applications. E-slot and double U-slot are used to increase performance of the gain and bandwidth. The simulation result from provide microstrip leaky-wave antenna with the addition E-slot and double U-slot obatained s-parameter of - 23,196 dB, VSWR of 1,164, bandwidth of 615 MHz, and gain of 6,16 dBi. Simulation results from microstrip leaky-wave antenna with the addition E-slot and double U-slot show that can increase bandwidth by 130,038 % and increase gain by 34,15 % compared to microstrip leaky-wave without the addition E-slot and double U-slot.Keywords: Microstrip Leaky Wave, Multislot, Bandwidth, Gain
Co-Authors Basari Basari Catur Apriono Djoko Hartanto Filda Ayu Afrida Fitri Yuli Zulkifli Harry Sudibyo Indra Surjati iqbal, muhamad wahyu Luh Putu Ratna Sundari Norihisa Hiromoto, Norihisa Nugroho Adi Saputro Purnomo Sidi Priambodo Rachman, Fajar Aulia Raj, Arockia Bazil Rizky Hidayat Prasetyo Soares, Fidelio Ucuk Darusalam