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All Journal International Journal of Electrical and Computer Engineering TELKOMNIKA (Telecommunication Computing Electronics and Control) Sinergi JURNAL ELEKTRO Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer Jurnal Teknologi Elektro ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Proceeding of the Electrical Engineering Computer Science and Informatics Al-Jabar : Jurnal Pendidikan Matematika JOURNAL OF INFORMATICS AND TELECOMMUNICATION ENGINEERING InComTech: Jurnal Telekomunikasi dan Komputer Matrix : Jurnal Manajemen Teknologi dan Informatika Techne : Jurnal Ilmiah Elektroteknika TESLA: Jurnal Teknik Elektro Jurnal Abdi Masyarakat (JAM) Jurnal Nasional Teknik Elektro dan Teknologi Informasi Jurnal Rekayasa elektrika
Dian Widi Astuti, Budi Irawan Prima Putra, Dian Widi Astuti,
Universitas Mercu Buana
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering

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Journal : International Journal of Electrical and Computer Engineering

 1 
Bandwidth enhancement and miniaturization of circular-shaped microstrip antenna based on beleved half-cut structure for MIMO 2x2 application Teguh Firmansyah; Supriyanto Praptodiyono; Herudin Herudin; Didik Aribowo; Syah Alam; Dian Widi Astuti; Muchamad Yunus
International Journal of Electrical and Computer Engineering (IJECE) Vol 9, No 2: April 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1791.647 KB) | DOI: 10.11591/ijece.v9i2.pp1110-1121

Abstract

In this paper, circular-shaped microstrip antenna was simulated, fabricated, and measured accordingly. As the novelty, to enhance bandwidth and reduce antenna size, beleved half-cut microstrip structure is proposed. Further, this proposed antenna structure will be applied to multiple input multiple output (MIMO) antenna 2´2. Therefore, this research was investigated conventional circular shape antenna (CCSA), circular shaped beleved antenna (CSBA), and MIMO circular shaped beleved antenna (MIMO-CBSA) as Model 1, Model 2, and Model 3, respectively. An FR4 substrate with er= 4.4, thickness h=1.6 mm, and tan d=0.0265 was used. The simulation has been conducted using Advanced Design System (ADS). The antenna CCSA/CSBA/ MIMO-CBSA achieve 1.831GHz/2.265 GHz/2.256 GHz, -15.13dB/-17.37dB/-17.25 dB, 1.42/1.31/1.33, and 1.474/2.332/2.322 for center frequency, reflection coefficient, VSWR, and bandwidth, respectively. This antenna has a size 63x90 mm and 51.5x90 mm for CCSA (Model 1) and CSBA (Model 2), respectively. After the structure of MIMO 2´2 was applied, the size of antenna MIMO-CBSA (Model 3) became 180 mm x 180 mm with a mutual coupling (S21)=-26.18 dB and mutual coupling (S31)=-26.41 dB. The result showed that proposed antenna CSBA (Model 2) has wider-bandwidth of 58,2% and smaller-size of 18.2%. Furthermore, after CSBA (Model 2) structure was applied to MIMO 2´2 (Model 3) and the MIMO antenna obtain good mutual coupling (<-15dB). Moreover, the measured results are good agreement with the simulated results. In conclusion, all of these advantages make it particularly valuable in multistandard antenna applications design such as GSM950, WCDMA1800, LTE2300, and WLAN2400.
Substrate integrated waveguide bandpass filter for short range device application using rectangular open loop resonator Dian Widi Astuti; Rizki Ramadhan Putra; Muslim Muslim; Mudrik Alaydrus
International Journal of Electrical and Computer Engineering (IJECE) Vol 11, No 5: October 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v11i5.pp3747-3756

Abstract

The substrate integrated waveguide (SIW) structure is the candidate for many application in microwave, terahertz and millimeter wave application. It because of SIW structure can integrate with any component in one substrate than others structure. A kind components using SIW structure is a filter component, especialy bandpass filter. This research recommended SIW bandpass filter using rectangular open loop resonator for giving more selectivity of filter. It can be implemented for short range device (SRD) application in frequency region 2.4 - 2.483 GHz. Two types of SIW bandpass filter are proposed. First, SIW bandpass filter is proposed using six rectangular open loop resonators while the second SIW bandpass filter used eight rectangular open loop resonators. The simulation results for two kinds of the recommended rectangular open loop resonators have insertion loss (S21 parameter) below 2 dB and return loss (S11 parameter) more than 10 dB. Fabrication of the recommended two kind filters was validated by Vector Network Analyzer. The measurement results for six rectangular open loop resonators have 1.32 dB for S21 parameter at 2.29 GHz while the S11 parameter more than 18 dB at 2.26 GHz – 2.32 GHz. While the measurement results has good agreement for eight rectangular open loop resonators. Its have S21 below 2.2 dB at 2.41 – 2.47 GHz and S11 16.27 dB at 2.38 GHz and 11.5 dB at 2.47 GHz.
Adaptive multi-radio quality of service model using neural network approach for robust wireless sensor network transmission in multipath fading environment Hakim, Galang Persada Nurani; Astuti, Dian Widi; Firdausi, Ahmad; Majid, Huda A.
International Journal of Electrical and Computer Engineering (IJECE) Vol 15, No 4: August 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v15i4.pp3795-3802

Abstract

Wireless sensor network loss in wireless data transmission is one of the problems that needs attention. Interference, fading, congestion, and delay are some factors that cause loss in wireless data transmission. This paper used an adaptive multi-radio model to enhance the wireless data transmission to be more robust to disturbance in a multipath fading environment. A neural network approach was used to generate the adaptive model. If we use 433 MHz as our carrier frequency with 250 kHz bandwidth and 12 spreading factors, we can get signal noise ratio (SNR) for 20 meters at about -9.8 dB. Thus, we can use the adaptive model to enhance the WSN wireless data transmission's SNR to 9 dB, automatically changing the radio configuration to 797.1 MHz frequency, with 378.1 bandwidth and 7.111 for spreading factor. Based on the result, the wireless data transmission link has been successfully enhanced using the proposed adaptive model for wireless sensor networks (WSN) in a multipath fading environment.
Co-Authors A Majid, Huda A.A. Ketut Agung Cahyawan W Achi Rinaldi Adhiyoga , Yohanes Galih Adhiyoga, Yohanes Galih Ahmad Firdausi Ali Djamhuri Alven Delano Alya Patrakomala Andika Eko Prasetiyo, Andika Eko Apriono , Catur Ardiansyah Ardiansyah Beny Nugraha Budi Irawan Prima Putra Cahyasiwi, Dwi Astuti Catur Apriono Darmanik, Sis Yasin Dewi Nusraningrum, Dewi Didik Aribowo Dwi Maya Nursyswanti Fatimah, Okis Firmansyah, Mu'min Galang Persada Nurani Hakim Herudin Herudin Iip Sugiharta Iis Andini Iis Andini, Iis Indra Dermawan Indra Surjati Intan Wahyuni Joranto Walesian Kusuma, Prima Wijaya Lydia Sari Mahendra, Dendi Majid, Huda A Majid, Huda A. Marnel, Sonfia Putra Muchamad Yunus Mudrik Alaydrus Muslim , Muslim Muslim Muslim Muslim Muslim Muslim Muslim Muslim Muslim Muslim Muslim Muslim, Muslim Naufal Rizki Rinditayoga Putri, Melinda Megahari R. Deiny Mardian Wijayapraja Rizki Ramadhan Putra Rusdiyanto, Dian Said Attamimi Sawarni Hasibuan Septian, Agung Setiyo Budiyanto Sis Yasin Darmanik Suherman, Suherman Supriyanto Praptodiyono Suryadi Suryadi Syah Alam Syah Alam Syah Alam Syamsul Huda Teguh Firmansyah Teguh Firmansyah TOGATOROP, SRI ARTHA Triya Agung Pahlevi Trya Agung Pahlevi Umaisaroh Umaisaroh Yudistiro Yudistiro Yudistiro Yudistiro, Yudistiro Yuli Kurnia Ningsih Yundari, Yundari Yus Natali Zahriladha Zakaria