تجاوز إلى المحتوى الرئيسي
User Image

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
2024

Highly Compact and Sensitive Dielectric Sensors

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 be applied to the design of highly sensitive dielectric sensors. By varying the areas of the rectangular CSRRs while maintaining a fixed perimeter, the side lengths along TLs are varied, causing the coupling factor to be controlled. As a result, the physical sensing areas are miniaturized, which is important for various applications, leading to an enhancement in sensitivity. In addition, we demonstrate that the critical coupling between the external circuit (e.g., TLs) and CSRRs can be easily achieved if required by certain applications. Our simulations and experimental measurements demonstrate that our approach can relatively reduce the physical sensing areas by up to 69.4%. These results can help engineers to design compact sensors. Compared with a recently published work, the enhanced sensitivity for detecting the presence of dielectric materials is 63.16%. Our results provide a roadmap for satisfying different design constraints and specifications and demonstrate the potential for this technique to be adopted in a variety of dielectric sensing and filter applications.

نوع عمل المنشور
Research
اسم الناشر
IEEE Sensors
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