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All Journal Bulletin of Electrical Engineering and Informatics ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika
Zahriladha Zakaria
Universiti Teknikal Malaysia Melaka
Electrical & Electronics Engineering Engineering

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A parametric study on strawberry radiated shaped monopole antenna for ultrawide-band applications Al-Gburi, Ahmed Jamal Abdullah; Zakaria, Zahriladha; Ibrahim, Imran Mohd; Akbar, Muhammad Firdaus; Al-Obaidi, Aymen Dheyaa Khaleel; Khabba, Asma
Bulletin of Electrical Engineering and Informatics Vol 12, No 1: February 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v12i1.4547

Abstract

This article gives a parametric study on strawberry-shaped monopole antennas for ultra-wideband (UWB) systems. The antenna design consisted of three different parametric design steps to structure the strawberry radiated monopole antenna. The scheduled strawberry monopole antenna was simulated on an FR4 substrate in a low profile for UWB applications. The total physical dimension is 26 mm×26 mm×1.6 mm, corresponding to the centre frequency of 7.5 GHz. The strawberry antenna is fed via a coplanar waveguide (CPW) to attain the best impedance matching for UWB systems. The presented monopole antenna has an impedance UWB bandwidth of 11.0 GHz from 2.6 GHz up to 13.6 GHz at −10 dB return loss. The simulated UWB strawberry monopole antenna displays an omnidirectional radiation behaviour with a simulated gain of 7.3 dB at 13.6 GHz, a directivity of 7.5 dBi at 13.6 GHz and favourable radiation efficiency of 97%. The proposed monopole UWB strawberry antenna has the technological possibility to be used for UWB applications.
Microstrip antenna with reflector and air gap for short range communication in 900 MHz band Shairi, Noor Azwan; Zakaria, Zahriladha; Mohd Ibrahim, Imran; Osman, Anwar Faizd
Bulletin of Electrical Engineering and Informatics Vol 13, No 2: April 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v13i2.5515

Abstract

This paper proposes a microstrip antenna that was made of a microstrip fed slot with a complimentary stub on a single dielectric medium. This antenna was integrated with a reflector and air gap for the application of short range communication (SRC) in a 900 MHz band. Analyses were made on the dimension of the reflector and the height of the air gap towards the antenna performance. Besides, an antenna field test was done for the propagation distance of the proposed antenna. As a result, with the antenna size of 13,770 mm2 , the measured return loss was -10.79 dB and the directivity gain was 7.44 dBi. Besides, with the effective isotropic radiated power (EIRP) of 7.44 dBm, it was predicted that at 100 m, the received signal would be around 60 to 70 dBm. Therefore, a high gain was produced by using a reflector with air gap and a compact size was achieved if compared to conventional high gain antenna designs such as Yagi Uda. Thus, it is suitable for a communication device such as the SRC application.
Low insertion loss open-loop resonator–based microstrip diplexer with high selective for wireless applications Elabd, Rania Hamdy; Al-Gburi, Ahmed Jamal Abdullah; Alhassoon, Khaled; Muzafar Ismail, Mohd; Zakaria, Zahriladha
Bulletin of Electrical Engineering and Informatics Vol 13, No 3: June 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v13i3.6789

Abstract

This paper presents a low-insertion-loss open-loop resonator (OLR)-based microstrip diplexer with high-selective for wireless applications. We used two series capacitive gaps in the microstrip transmission line, loaded with rectangular-shaped half-wavelength OLRs, to create a high-selectivity bandpass filter (BPF). The planned BPFs are linked through a T-junction combiner, precisely tuned to align with both filters and the antenna port in order to produce the proposed diplexer. The system is implemented on a rogers TMM4 substrate with a loss tangent of 0.002, a dielectric constant of 4.7, and a thickness of 1.52 mm. The suggested diplexer has dimensions of (90×70) mm². It achieves a modest frequency space ratio of R=0.1646 in both transmit and receive modes by having two resonance frequencies of ft=2.191 GHz and fr=2.584 GHz, respectively. The simulated structure displays good insertion losses of approximately 1.2 dB and 1.79 dB for the two channels, respectively, at fractional bandwidths of 1.24% at 2.191 GHz and 0.636% at 2.584 GHz. The simulated isolation values for 2.191 GHz and 2.584 GHz are 53.3 dB and 66.5 dB, respectively.
Antena Mikrostrip MIMO dengan Teknik Planar Series Array 4x2 elemen untuk Sistem Komunikasi 5G ALAM, SYAH; SURJATI, INDRA; NINGSIH, YULI KURNIA; SARI, LYDIA; SURYADI, SURYADI; MARDIAN, RADEN DEINY; FIRMANSYAH, TEGUH; ZAKARIA, ZAHRILADHA; ASTUTI, DIAN WIDI
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 12, No 2: Published April 2024
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v12i2.441

Abstract

ABSTRAKMakalah ini mengusulkan antena mikrostrip dengan dengan performansi tinggi yang beroperasi pada frekuensi resonansi 3,5 GHz untuk sistem komunikasi 5G. Antena dikembangkan dalam dengan teknik array planar seri 4x2 elemen yang dikonfigurasi MIMO. Berdasarkan hasil pengukuran, antena yang dirancang memiliki koefisien refleksi <= -10 dB, koefisien isolasi <= -40 dB dengan rentang frekuensi 3.1 GHz – 3,7 GHz dan gain maksimum sebesar 12,52 dB pada frekuensi resonansi 3,5 GHz. Bandwidth dan penguatan antena masing-masing meningkat sebesar 172.72% dan 160.83 %. Penelitian ini dapat direkomendasikan untuk digunakan sebagai antena penerima sistem komunikasi 5G.Kata kunci: antena, array, mikrostrip, MIMO, planar, 5G ABSTRACTThis article suggests a microstrip antenna with high performance, designed to operate at the resonant frequency of 3.5 GHz in 5G communication systems. The antenna is developed in a MIMO-configured 4x2 element series planar array technique. Based on measurement results, the proposed antenna exhibits a reflection coefficient of <= -10 dB, an isolation coefficient of <= -40 dB, within the frequency range 3.1 – 3.7 GHz and maximum gain of 12.52 dB at the resonant frequency of 3.5 GHz. The antenna's bandwidth and gain enhanced until 172.72% and 160.83%, respectively. This study suggests the potential use of the developed antenna as a reception device in 5G communication systems.Keywords: antenna, array, microstrip, MIMO, planar, 5G
Co-Authors Akbar, Muhammad Firdaus Al-Gburi, Ahmed Jamal Abdullah Al-Obaidi, Aymen Dheyaa Khaleel Alhassoon, Khaled Dian Widi Astuti Elabd, Rania Hamdy Ibrahim, Imran Mohd Indra Surjati Khabba, Asma Lydia Sari Mohd Ibrahim, Imran Muzafar Ismail, Mohd Osman, Anwar Faizd R. Deiny Mardian Wijayapraja Shairi, Noor Azwan Suryadi Suryadi Syah Alam Teguh Firmansyah Yuli Kurnia Ningsih