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All Journal Indonesian Journal of Electrical Engineering and Informatics (IJEEI)
M. H. Habaebi
International Islamic University Malaysia
Computer Science & IT Electrical & Electronics Engineering

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Site Diversity Gain for Earth-to-Satellite Links Using Rain Intensity Measurement Md Rafiqul Islam; Ali Kadhim Lwas; M. H. Habaebi
Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Vol 5, No 4: December 2017
Publisher : IAES Indonesian Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52549/ijeei.v5i4.364

Abstract

Site diversity technique is effective method to overcome rain attenuation, mostly in the tropics where high precipitation is predominant. The method is analyzed based on measurements in two locations separated by 37.36 Km in Malaysia. From concurrent measured rain intensities of two locations at IIUM and UKM for one year, it was found that only ten concurrent events had occurred containing highest rain intensities of 18 mm/h with outage probability of 0.00154% on two locations out of about 381 events experienced over one year period. These findings will be very useful for Earth-to-satellite link designers to improve reliability by applying site diversity as a rain fade mitigation technique at any frequency.
A 2X2 MIMO Patch Antenna for Multi-Band Applications Islam Md Rafiqul; Waheeb S. A; Sarah Rafiq; M. S. Yasmin; M. H. Habaebi
Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Vol 5, No 4: December 2017
Publisher : IAES Indonesian Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52549/ijeei.v5i4.374

Abstract

In this paper, a Multiple Input Multiple Output (2x2MIMO)  patch antenna for  multiband applications has been proposed. It has been designed using groups of rings nearby the stepped cut at four corners of the patch and a separation in mid slot. This modification is proposed in order to increase the resonant frequencies and reduce the mutual coupling. The proposed 2x2 MIMO patch antenna is simulated using Computer Simulation Technology (CST), fabricated and tested. With such small geometrical dimensions, the proposed antenna is suitable for LTE (1.8 GHz), WiFi (2.4 GHz), and WiMax (3.5 GHz, 5.2 GHz and 5.5 GHz) applications
Co-Authors Ali Kadhim Lwas Islam Md Rafiqul M. S. Yasmin Md Rafiqul Islam Sarah Rafiq Waheeb S. A