Perancangan dan Realisasi Antena Mikrostrip Phased Array Ku-band untuk Penerima Stasiun Bumi Satelit Geostasioner

Lubis, Affif Balya Arvasyad (2026) Perancangan dan Realisasi Antena Mikrostrip Phased Array Ku-band untuk Penerima Stasiun Bumi Satelit Geostasioner. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penggunaan frekuensi Ku-band pada sistem komunikasi satelit memungkinkan ketersediaan bandwidth yang lebih lebar, namun antena mikrostrip yang umum digunakan masih memiliki keterbatasan bandwidth dan performansi radiasi. Penelitian ini membahas perancangan dan realisasi antena mikrostrip phased array sebagai antena penerima satelit geostasioner pada frekuensi Ku-band. Metode perancangan menggunakan kombinasi teknik U-slot dan proximity coupled feed untuk meningkatkan bandwidth tanpa memperbesar dimensi antena. Simulasi dilakukan menggunakan CST Studio Suite, sedangkan proses fabrikasi direalisasikan oleh pihak ketiga, yaitu PT. Spectra. Pengukuran performansi antena dilakukan pada konfigurasi antena array berukuran 8×4 elemen. Hasil pengukuran menunjukkan bahwa antena yang direalisasikan telah memenuhi sebagian besar parameter perancangan. Frekuensi kerja antena berada pada rentang 12,442–12,605 GHz, masih sesuai dengan target 12,37–12,75 GHz, dengan frekuensi tengah sebesar 12,53 GHz. Bandwidth hasil pengukuran sebesar 0,163 GHz lebih kecil dibandingkan target akibat toleransi fabrikasi dan rugi-rugi material. Polarisasi antena bersifat linear, dengan impedansi mendekati 50 ohm dan VSWR 1,036 : 1. Nilai gain pengukuran sebesar 12,71 dBi lebih rendah dibandingkan target simulasi ideal akibat rugi-rugi pencatuan. Nilai cross-polarization discrimination (XPD) sebesar 19,77 dB belum mencapai target karena ketidakseimbangan amplitudo dan fasa antar elemen antena.
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The use of Ku-band frequencies in satellite communication systems enables wider bandwidth availability, however, commonly used microstrip antennas still suffer from limited bandwidth and radiation performance. This research presents the design and realization of a microstrip phased array antenna as a receiver antenna for geostationary satellite applications operating in the Ku-band. The proposed design employs a combination of the U-slot technique and proximity-coupled feeding to enhance bandwidth without significantly increasing the antenna dimensions. Antenna simulation was carried out using CST Studio Suite, while the fabrication process was conducted by a third-party manufacturer, PT. Spectra. Antenna performance measurements were performed on an 8×4 array configuration. The measurement results indicate that the realized antenna meets most of the design specifications. The measured operating frequency range is 12.442–12.605 GHz, which lies within the target range of 12.37–12.75 GHz, with a measured center frequency of 12.53 GHz. The measured bandwidth of 0.163 GHz is narrower than the target value due to fabrication tolerances and material losses. The antenna exhibits linear polarization, with an impedance close to 50 ohm and a VSWR of 1.036:1. The measured gain of 12.71 dBi is lower than the ideal simulated target due to feeding and material losses. The measured cross-polarization discrimination (XPD) of 19.77 dB does not reach the target value, mainly due to amplitude and phase imbalance among array elements.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Antena Mikrostrip, Phased Array, Ku-band, U-slot, Proximity Coupled Feed, 8x4 Antena Array, Microstrip Antenna, Phased Array, Ku-band, U-slot, Proximity Coupled Feed, 8x4 Antenna Array
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7871.6 Antennas (Electronics)
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Affif Balya Arvasyad Lubis
Date Deposited:	26 Jan 2026 10:10
Last Modified:	26 Jan 2026 10:10
URI:	http://repository.its.ac.id/id/eprint/130520

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