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All Journal Jurnal Teknik Elektro Journal of Electrical Technology UMY Jurnal Elektronika dan Telekomunikasi TESLA: Jurnal Teknik Elektro Buletin Ilmiah Sarjana Teknik Elektro Indonesia Berdaya
Liya Yusrina Sabila
Universitas Ahmad Dahlan
Arts Humanities Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Library & Information Science Medicine & Pharmacology Nursing Public Health Social Sciences Veterinary Other

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Miniaturized Spiral Planar Inverted F Antenna of 2.4 GHz Using Design of Experiment Method for EEG-based Controlled Prosthetic Arm Liya Yusrina Sabila; Teguh Prakoso; Munawar Agus Riyadi
Jurnal Elektronika dan Telekomunikasi Vol 22, No 1 (2022)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jet.445

Abstract

This paper presents the design of a planar inverted F antenna with a miniature or tiny shape at the frequency of 2.4 GHz. The antenna uses a spiral design to reduce the dimension of the antenna with conformal shape for a suitable prosthetic arm. Usually, the antenna design uses long experimental steps, namely trial and error. It can be summarized using the DOE (design of experiment) method. The DOE is a method to streamline the experimental steps to get the best design. The DOE method uses a tuning reference at the design parameter variation of 5 % of the nominal value. Four tuning steps can get the best results from S11, bandwidth, and gain. The designed antenna works at the resonant frequency of 2.431 GHz with the value of S11 is -22.634 dB, bandwidth of 37.1 MHz, and gain of -7.596 dBi.
Bevel Modification Effect on Rectangular Patch for UWB Using Theory Characteristics Mode Liya Yusrina Sabila; Denti Agustina Damayanti
Buletin Ilmiah Sarjana Teknik Elektro Vol. 4 No. 2 (2022): Agustus
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/biste.v4i2.6970

Abstract

Ultra-wideband (UWB) is a communications technology that operates on frequencies between 3.1 and 10.6 GHz and has a wide bandwidth. This paper aims to look at the radiation characteristics of the structure using the Theory Characteristic Mode on a rectangular antenna with bevel modifications at the end of the patch. It can be seen from the active mode at the appropriate frequency to validate the antenna performance results. It was found that the proposed antenna has four operational modes in the antenna design before modification and seven active modes in the antenna design after modification. The antenna is made of FR-4 material with a thickness of 1.575 mm and a dielectric constant of 4.3. The bandwidth in the error measurement is around 7 GHz and a frequency range of 3.18 - 10.915 GHz with an S11 value of less than -10 and a VSWR value of less than 2. Ultra-wideband (UWB) adalah teknologi komunikasi yang beroperasi pada frekuensi antara 3,1 dan 10,6 GHz dan memiliki bandwidth yang sangat lebar. Makalah ini bertujuan untuk melihat karakteristik struktur radiasi menggunakan Theory Characteristic Mode pada antena rectangular dengan modifikasi bevel diujung patch. Untuk validasi hasil performansi antena dapat dilihat dari mode aktif pada frekuensi yang sesuai. Ditemukan bahwa antena yang diusulkan memiliki 4 mode aktif pada desain antena sebelum modifikasi dan 7 mode aktif pada desain antena sesudah modifikasi.. Antena terbuat dari bahan FR-4 dengan ketebalan 1,575 mm dan konstanta dielektrik 4,3. Bandwidth yang dicapai pada pengukuran adalah disekitar 7 GHz dan rentang frekuensi 3,18 - 10,915 GHz dengan nilai S11 kurang dari -10 dan nilai VSWR kurang dari 2.
DESAIN MINIATUR MEANDER PLANAR INVERTED F ANTENNA PADA 915 MHZ UNTUK TANGAN BIONIK MENGGUNAKAN DESIGN OF EXPERIMENT Liya Yusrina Sabila; Teguh Prakoso; Munawar Agus Riyadi
TESLA: Jurnal Teknik Elektro Vol 24 No 2 (2022): TESLA: Jurnal Teknik Elektro
Publisher : Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/tesla.v24i2.14960

Abstract

To improve the quality of the bionic hands used by some disabled people, new innovations are needed. By implementing IoT in the development of bionic hands, it can make it easier for patients to obtain information, such as monitoring battery capacity, bionic hand life, and bionic hand health. So we need a component that is able to transmit this information. In this paper, we are the Meander Planar Inverted F Antenna (PIFA) at a frequency of 915 – 925 MHz which is compatible with Sigfox or LoRa IoT technology. The antenna is designed to have miniature characteristics so that it does not interfere with other components when implanted in the bionic arm and is curved so that it can follow the curved shape of the bionic arm. The miniature technique used is the winding technique and the conformal technique is used to give a curved effect to the antenna. The design is carried out very systematically by streamlining the steps using the Design of Experiment method. It is proven that it only takes 6 steps to get results that match the specifications. The simulation results show the value of S11 is -21 dB, resonant frequency is 924.9 MHz, bandwidth is 13.5 MHz, gain is -23.34 dBi and radiation pattern is omnidirectional.
Design of Circular Patch Array Microstrip Antenna Using Slot for ISM Band Liya Yusrina Sabila; Anton Yudhana; Muhammad Miftahul Amri; Asra Akrima; Igo Putra Pratama
Journal of Electrical Technology UMY Vol 6, No 2 (2022): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v6i2.16514

Abstract

This paper presents a Microstrip Antenna Analysis for the ISM Band with a circular patch design with a radius of 17 mm at a frequency of 2,400 – 2.484 GHz. The fabricated array antenna has a very compact width and length of 9.5 x 7.5 cm each. Therefore, an increase in bandwidth on the monopole antenna can be applied to the array arrangement. So to get the best antenna design, two optimizations of antenna size changes are carried out during the simulation: optimization of patch radius and slot length. The radius variation is used to shift the frequency range and slot length for impedance matching, as seen from the S11 value of less than -10 dB. From each change, the best results are taken. Experiments get the best antenna simulation results and are then fabricated. From the measurement results on the fabricated antenna, the lowest S11 value is -19.602 dB, and the gain is 3.52 dBi. The slot technique's optimization process has successfully shifted the frequency to approximately 100 MHz and increased the bandwidth by about 5% or 40 MHz.
Coil-based Wireless Power Transfer for Implanted Pacemakers: A Brief Review Urfa Khairatun Hisan; Liya Yusrina Sabila; Muhammad Miftahul Amri
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.v15i1.42662

Abstract

Nowadays, implanted permanent pacemakers (PPM) users need to undergo periodic pacemaker replacement surgery. The surgery is needed since the pacemaker's battery is usually depleted in 5-10 years. This surgery, although poses relatively low health risks, is inconvenient for PPM users. Moreover, the surgery can still be dangerous for PPM users, especially considering that most of the users are elderly. PPM replacement surgery is also costly. In addition to the costs of the surgery itself, the PPM users need to bear the price of the new PPM every time they undergo surgery. Currently, when the PPM's battery runs out, the whole PPM needs to be replaced. This is conducted to prevent the possibility of a leak in the battery seal, which might allow the body fluids to enter the PPM. Typically, once a battery is inserted into the PPM, it will be permanently sealed along with all other electronic components, and thus, battery-only replacement is impossible. Thanks to the recent advancement of wireless power transfer (WPT) technology, a PPM replacement surgery might no longer be necessary in the near future. This article presents a brief review of the current state of coil-based WPT technology and its potential applications in pacemakers. Depending on the load and transmission distance, a recent WPT system for PPM could achieve WPT efficiency as high as 97.91% on air and 78% on pig tissue medium. In terms of output power, recent works that we have summarized showed that they are able to transmit power up to 5W on a WPT system implemented on a human phantom. We also discuss the challenges, limitations, and future prospects for WPT in the medical field, particularly for PPM applications.
Application of the Internet of Things in Waste Processing Equipment for Batik Craftsmen in Iroyudan Village, Guwosari Village, Pajangan District, Bantul Regency Liya Yusrina Sabila; Shinta Amelia; Rachma Tia Evitasari; Shandy Auliya Ma'arief; Pita Adis Hernanda
Indonesia Berdaya Vol 5, No 1 (2024)
Publisher : UKInstitute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ib.2024644

Abstract

Yogyakarta is one of the largest batik-producing cities in Indonesia. It has a positive impact on the artisans's economy. It adds new jobs, but this has yet to be matched by the skills and knowledge of the artisans in managing liquid waste generated from batik activities. So far, liquid batik waste has been stored in holding tanks and allowed to seep into the ground or even directly thrown into the water without further processing. So, it harms the environment, such as pollution of the waters and the surrounding environment and even the death of aquatic biota. Therefore, a renewable technological innovation was created, combined with the Heterogeneous Fenton method as a medium for processing batik waste. The methods used include pre-test, lecture, question and answer and post-test. Based on service activities that have been carried out, including providing information on equipment technology of batik waste processing to batik artisans in Desai Iroyudan, Guwosari Village, Pajangan District, Bantul Regency, Yogyakarta, it is known that the level of community understanding has become 98% or increased by 23%.
Co-Authors Anton Yudhana Asra Akrima Denti Agustina Damayanti Evitasari, Rachma Tia Igo Putra Pratama Muhammad Miftahul Amri Munawar Agus Riyadi Munawar Agus Riyadi Pita Adis Hernanda Shandy Auliya Ma'arief Shinta Amelia Teguh Prakoso Teguh Prakoso Urfa Khairatun Hisan