Design and analysis of a microstrip patch antenna at 7.5 GHz for X-band VSAT application

• Main Authors: Mohamad, Sarah Yasmin, Muzamil, Noralya Fatin, Abdul Malek, Norun, S. M. A., Motakabber, Abd Malik, Rafidah, Shuhaimi, Nurain Izzati
• Format: Article
• Language: English; English
• Published: IIUM 2022
• Subjects: TK Electrical engineering. Electronics Nuclear engineering; TK5101 Telecommunication. Including telegraphy, radio, radar, television
• Online Access: http://irep.iium.edu.my/96364/1/96364_Design%20and%20analysis%20of%20a%20microstrip%20patch.pdf; http://irep.iium.edu.my/96364/7/96364_Design%20and%20analysis%20of%20a%20microstrip%20patch_SCOPUS.pdf; http://irep.iium.edu.my/96364/; https://journals.iium.edu.my/ejournal/index.php/iiumejhttps://journals.iium.edu.my/ejournal/index.php/iiumej/article/view/1744; https://doi.org/10.31436/iiumej.v23i1.1744
• Institution: Universiti Islam Antarabangsa Malaysia

In this paper, a microstrip patch antenna is designed to be used for X-band VSAT application at 7.5 GHz. The antenna is proposed to replace the massive and commonly used parabolic reflector antennas (46.0 inch × 29.3 inch × 13.5 inch (116.84 cm × 74.42 cm × 34.29 cm) with weight of 66.2 kg) in terms of portability due to its compact and lightweight features, with overall dimensions of 19.00 mm × 30.55 mm. The 7.5 GHz frequency is chosen based on the X-band frequency used in Malaysia, as reported by STRIDE. The microstrip patch antenna is first designed and simulated using CST Microwave Studio (CST MWS) and exhibits a good return loss (S11) of -42.09 dB, a bandwidth of 399 MHz, directivity of 7.63 dB and gain of 7.18 dB. The antenna is then fabricated using RT/duroid ® High Frequency 5880 substrate with a dielectric constant of εr = 2.2, loss tangent of δ = 0.0009 and thickness of t = 1.574 mm. Next, the return loss and radiation pattern measurements are carried out to confirm the simulated results. The measurement of the antenna prototype provides a return loss S11 of -30.53 dB, bandwidth of 455 MHz, directivity of 5.51 dB and gain of 3.88 dB.