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Dr. Ali Mohammed Almuhlafi | د. علي بن محمد المحلفي

Assistant Professor

Full-Time Faculty

كلية الهندسة
Building 3, 2nd floor, Office No. 2C9
المنشورات
مقال فى مجلة

Interconnected Circular Ring Resonator based Single Negative Perfect Metamaterial Absorber for Wireless Communication Systems

In this paper, a new metamaterial absorber (MMA) is presented that exhibits resonances at 3.5 GHz and 13 GHz having peak absorption of 92.7% and 99.99% respectively. The MMA consists of an FR4 substrate with three interconnected circular rings and disk-shaped metallic layers at the top and full copper at the back. The overall dimension is 0.14λ0 × 0.14λ0, where λ0 is calculated at 3.5 GHz. The design is optimized through numerical simulation performed in CST microwave studio. The MMA shows polarization angle and incident angle insensitivity up to 60° for both transverse electric and transverse magnetic waves. The equivalent circuit is modeled and verified through simulation in Advanced Design Software (ADS). It exhibits an almost zero polarization conversion ratio with a maximum value of 0.002 at 13 GHz. The prototype of the MMA is developed and the measured result shows good similarity with the simulation. Due to polarization and incident angle intensity, and good absorption, this compact MMA can be applied in wireless communication systems including wave shielding from 5G signals, and microwave sensing.

اسم الناشر
Springer US-Optical and Quantum Electronics
مزيد من المنشورات
publications

In this paper, a new metamaterial absorber (MMA) is presented that exhibits resonances at 3.5 GHz and 13 GHz having peak absorption of 92.7% and 99.99% respectively. The MMA consists of an FR4…

بواسطة Md. Murad Kabir Nipun, Md. Jahedul Islam, Md. Moniruzzaman, Muzammil Jusoh, Hamsakutty Vettikalladi, Ali M. Almuhlafi, Mohamed Himdi and Samir Salem Al-Bawri
تم النشر فى:
Springer US-Optical and Quantum Electronics
publications

This paper presents a novel quad-element array with multiple inputs and multiple outputs (MIMO) designed for 5th generation sub-6 GHz applications. The MIMO system achieves a wide impedance…

بواسطة Rabia Khan, Waleed Tariq Sethi, Waqar Ahmad Malik, Latif Jan, Muhammad M. Tahseen, Ali M. Almuhlafi and Mohamed Himdi
2023
تم النشر فى:
Nature-Scientific Reports
publications

This work proposes a novel and simple microwave technique for controlling the coupling factor between complementary split ring resonators (CSRRs) and microstrip transmission lines (TLs), which can…

بواسطة Ali M. Almuhlafi; Omar M. Ramahi
2024
تم النشر فى:
IEEE Sensors