Hani Fikry Ragai

Prof. Dr. Hani Fikry Ragai

orcid

Research Focus & Metrics

Academic Career Length

25Years (2002-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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15 January 2007 in IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing
Verified
Journal Article
Closed access
AAAhmed Amer
Ahmed Amer
EHEmad Hegazi
Emad Hegazi
HRHani Fikry Ragai
Hani Fikry Ragai
In this brief, the design of a low-power inductorless wideband low-noise amplifier (LNA) for worldwide interoperability for microwave access covering the frequency range from 0.1 to 3.8 GHz using 0.13-mum CMOS is described. The core consumes 1.9 mW from a 1.2-V supply. The chip performance achieves S11 below -10 dB across the entire band and a minimum noise figure of 2.55 dB. The simulated third-order input intercept point is -2.7 dBm. The voltage gain reaches a peak of 11.2 dB in-band with an upper 3-dB frequency of 3.8 GHz, which can be extended to reach 6.2 GHz using shunt inductive peaking. A figure of merit is devised to compare the proposed designs to recently published wideband CMOS LNAs

25 January 2019 in IEEE Access
Verified
Journal Article
Open access
MBMahmoud S. Badran
Mahmoud S. Badran
HIHanady Issa
Hanady Issa
SASaleh Eisa Ahmed
Saleh Eisa Ahmed
HRHani Fikry Ragai
Hani Fikry Ragai

1 April 2013
Verified
Conference Paper
Closed access
RGRania Gomaa
Rania Gomaa
IAIhab Adly
Ihab Adly
KSKaram Sharshar
Karam Sharshar
ASAhmed Safwat
Ahmed Safwat
HRHani Fikry Ragai
Hani Fikry Ragai
Wireless Sensor Networks (WSN) is increasing its market share in many industrial, health, surveillance and nuclear applications. This paper describes the design of a WSN that allows smart real time monitoring of radiation levels at nuclear facilities. We develop a local low cost prototype of wireless sensor node equipped with a radiation sensor. The wireless node based on ZigBee technology and Arduino platform, it is implemented using TI CC2530 chips. The radiation sensor is based on Geiger Muller tube (GMT) as a reliable detector for the radioactive particulates in the gaseous effluent vented from nuclear facilities. The WSN allows the operators to record and control the radiation levels emitted to the environment and it is supported with warning system for the early detection of radiation release. We evaluated the performance of the radiation sensor by the accuracy of the readings while the wireless link performance is represented in terms of the Received Signal Strength Indicator (RSSI), the Link Quality Indicator (LQI) and the Packet Reception Ratio (PRR).

31 August 2017
Verified
Book Chapter
Closed access
PDF file
MOMohanad Odema
Mohanad Odema
IAIhab Adly
Ihab Adly
AWAyman Wahba
Ayman Wahba
HRHani Fikry Ragai
Hani Fikry Ragai

16 September 2014 in IEEE Sensors Journal
Verified
Journal Article
Closed access
RGRania Ibrahim Gomaa
Rania Ibrahim Gomaa
ISIhab Adly Shohdy
Ihab Adly Shohdy
KSKaram Amin Sharshar
Karam Amin Sharshar
AAAhmed Safwat Al-Kabbani
Ahmed Safwat Al-Kabbani
HRHani Fikry Ragai
Hani Fikry Ragai
Upon tightening new regulations, the demand for using smart wireless sensing for health, safety, and surveillance applications of nuclear installations is growing rapidly. To help with the developments, this paper describes the design of a practical small-scaled wireless sensor network (WSN) that allows a smart real-time monitoring of radiation levels at nuclear facilities. A wireless system compiled with a radiation sensor and associated peripherals been developed and implemented upon ZigBee technology using TI CC2530 chip. The radiation sensor uses a Geiger Muller tube as a reliable detector for the radioactive particulates in the gaseous effluent vented from nuclear facilities. The WSN allows the operators to record and control the radiation levels emitted to the environment and it is supported with a warning system, for the early detection of radiation release. However, building a reliable wireless sensing system with an effective coverage, especially for indoor applications, requires professional planning and proper investigation. In this paper, a procedure to investigate the wireless sensing coverage is reported where a ray-tracing simulator is adopted to enable the wireless node placement prior to the deployment. A real test scenario has been implemented based on the built wireless node to examine network coverage inside a 60-m hallway and results have been compared with simulations showing a 100% packet reception ratio.

1 January 2011
Verified
Conference Paper
Closed access
KSKhaled Salah
Khaled Salah
HRHani Fikry Ragai
Hani Fikry Ragai
YIYehea Ismail
Yehea Ismail
ARAlaa El Rouby
Alaa El Rouby
This paper proposes an equivalent lumped element model for various multi-TSV arrangements and introduces closed form expressions for the capacitive, resistive, and inductive coupling between those arrangements. The closed form expressions are in terms of physical dimensions and material properties and are driven based on the dimensional analysis method. The model's compactness and compatibility with SPICE simulators allows the electrical modeling of various TSV arrangements without the need for computationally expensive field-solvers and the fast investigation of a TSV impact on a 3-D circuit performance. The proposed model accuracy is tested versus a detailed electromagnetic simulation and showed less than 6% difference. Finally, the proposed model can be a possible solution to the industrial need for broadband electrical modeling of TSVs interconnections arising in 3-D integration. Also, our presented work provides valuable insight into creating guidelines for TSV macro-modeling.