Adrian Ioan Petrariu

Adrian Ioan Petrariu
Ştefan cel Mare University of Suceava | USV · Faculty of Electrical Engineering and Computer Sciences

Doctor of Engineering

About

45
Publications
25,711
Reads
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832
Citations
Additional affiliations
October 2014 - present
Ştefan cel Mare University of Suceava
Position
  • Lecturer
Description
  • - preparing and supporting laboratories for "Computer Aided Design", "Electromagnetic Compatibility", "RFID systems", "Wireless Systems and Applications" - preparing and supporting courses for "Wireless Systems and Applications" and "Input/Output Systems in PC"
October 2012 - October 2014
Ştefan cel Mare University of Suceava
Position
  • Professor (Assistant)
Description
  • Preparing and supporting laboratory classes for "Computer Aided Design", "Electromagnetic Compatibility", "Identification Systems", "Passive Components and Circuits".
October 2009 - October 2012
Ştefan cel Mare University of Suceava
Position
  • Professor (Assistant)
Description
  • The main objectives are represented by the insurance of a specific and particular environment for research activities, training of the newest generations of engineers of the perspectives regarding both research and didactic activity.
Education
October 2009 - February 2013
Ştefan cel Mare University of Suceava
Field of study
  • Software and electronics
October 2004 - July 2009

Publications

Publications (45)
Article
Full-text available
The Internet of Things (IoT) concept involves connecting devices to the internet and forming a network of objects that can collect information from the environment without human intervention. Although the IoT concept offers some advantages, it also has some issues that are associated with cyber security risks, such as the lack of detection of malic...
Article
Full-text available
The Internet of Things (IoT) has become a part of modern life where it is used for data acquisition and long-range wireless communications. Regardless of the IoT application profile, every wireless communication transmission is enabled by highly efficient antennas. The role of the antenna is thus very important and must not be neglected. Considerin...
Article
Full-text available
In this paper, we present the design, development and implementation of an integrated system for the management of COVID-19 patient, using the LoRaWAN communication infrastructure. Our system offers certain advantages when compared to other similar solutions, allowing remote symptom and health monitoring that can be applied to isolated or quarantin...
Article
Full-text available
This paper proposes a solution for the development of microclimate monitoring for Low Voltage/High Voltage switchgear using the PRTG Internet of Things (IoT) platform. This IoT-based real time monitoring system can enable predictive maintenance to reduce the risk of electrical station malfunctions due to unfavorable environmental conditions. The co...
Article
Full-text available
Electric power infrastructure has revolutionized our world and our way of living has completely changed. The necessary amount of energy is increasing faster than we realize. In these conditions, the grid is forced to run against its limitations, resulting in more frequent blackouts. Thus, urgent solutions need to be found to meet this greater and g...
Article
Full-text available
The development of Low-Power Wide-Area Networks is challenging in urban areas due to the terrain elevation changes, clutter losses or dense vegetation regions that attenuate the radio signals. To provide accurate coverage estimation, signal propagation models that integrate losses caused by reflections or attenuations should be used. In this study,...
Preprint
Full-text available
This paper proposes a solution for the development of microclimate monitoring for Low Voltage / High Voltage switchgear using the PRTG Internet of Things (IoT) platform. This IoT-based real time monitoring system can enable predictive maintenance to reduce the risk of electrical station malfunctions due to unfavorable environmental conditions. The...
Article
Energy management efficiency is a topical issue for IoT sensor networks because a sensor can be placed in harsh or hardly accessible places and must transmit data without maintenance. One characteristic of the LoRa technology is the high current peaks during the data transmission procedure. These current peaks can decrease the lifetime of the conve...
Article
Full-text available
The digital revolution has changed the way we implement and use connected devices and systems by offering Internet communication capabilities to simple objects around us. The growth of information technologies, together with the concept of the Internet of Things (IoT), exponentially amplified the connectivity capabilities of devices. Up to this mom...
Article
Full-text available
The expansion of the concept of the Internet of Things (IoT), together with wireless sensor networks, has given rise to a wide range of IoT applications. This paper presents and describes the concept, theory of operation, and practical results of a Telecare-ECG (Electrocardiogram) Monitoring device, designed for the remote monitoring of out-of-hosp...
Article
Full-text available
In recent years the IoT concept is more and more powerful, having set the goal of integrating billions of devices to the Internet. Thus, from this perspective, the interest allocated to low-power wireless networks of sensors is higher than ever. In this paper, the SigFox scalability is analyzed from the IoT concept point of view. In the scientific...
Article
Full-text available
Due to the fast growing of automatic processing in the majority of industrial applications, use of RFID technology is almost mandatory. These systems must identify, with high accuracy, objects placed at different angles or objects placed in harsh environments. In this paper, a new design of an HF RFID reader antenna is proposed, which uses a multi-...
Conference Paper
Full-text available
Measuring the radiated EM field generated by an antenna mounted on a wireless device can be a time consuming operation with traditional methods. In this paper, we present a real-time measuring technique in the near-field generated by a wireless device antenna, working at 13.56 MHz. The method implies LED Field Sensors placed in arrays, which provid...
Article
Full-text available
In this paper, a high-performances microstrip antenna for UHF (ultra high frequency) RFID (radio frequency identification) tag is designed, prototyped and tested. The antenna consists of two main components: a 1.52 mm RT/duroid 5880 laminate substrate on which the antenna is designed and a 10 mm polytetrafluoroethylene (PTFE) dielectric material pl...
Conference Paper
This paper relates the development of a simple metal mountable RFID tag designed for ETSI band. One important aspect given by this design is using a simplistic structure that can be adjusted for different type of IC chip impedances that exists on the market. The antenna is simulated and measured and the obtained results reveals that the tag can be...
Conference Paper
This paper presents a low cost and a low profile flexible microstrip patch tag antenna for UHF RFID systems that can be metal mountable. The simple design that doesn't imply using shorting pins, flexibility and small size (25mm × 50mm × 0.5mm) are a few of the advantages given by this design. The proposed antenna is simulated and the results obtain...
Conference Paper
An important aspect that should be taken into consideration when we talk about RFID systems is the antenna impedance matching. When a mismatch occurs in the antenna circuit, the power transferred from the RFID reader to its antenna is reflected, causing drastically decreasing of the tags reading distance. In this paper are analyzed some matching im...
Conference Paper
In wireless systems, the power transfer efficiency is very important. Many systems are used in harsh environments and the signal transmitted can be drastically affected by these environments. HF RFID systems are widespread nowadays, in many domains, but the metallic environments are an impediment to the extension of these systems in different appli...
Article
Full-text available
Security provided for trademark products became nowadays an active point of view. Regarding this aspect, in this paper is proposed an RFID OPC UA server architecture used to ensure the identification, authentication and traceability of trademark products, using as fundamental components OPC UA wrappers. To this end, each product will have a RFID ta...
Article
Full-text available
RFID systems are sensitive to metallic environments in the proximity of the reader antenna. These influences produce shifting of the resonance frequency, causing performances degradation for the entire RFID system. Based on the behavior analysis of an HF RFID antenna circuit in the proximity of metallic environments, in this paper are proposed two...
Conference Paper
Full-text available
RFID applications for high-capacity storage require a large number of readers. They must be connected to the enterprise intranet using an internal network of switches organized in one or more levels, or using VPN. Traffic in such a network may involve, at certain times of a day, an intensive stream of the data. Design and testing of such a network...
Conference Paper
This paper approaches the issues concerning the coexistence of the Wireless Sensor Networks (WSN) IEEE 802.15.4, the IEEE 802.11g wireless networks and the ad-hoc Bluetooth networks that function within the same 2.4 GHz band. The quality of communication is assessed by analyzing the PER (Packet Error Rate) parameter. The tests are based on the wors...
Conference Paper
Full-text available
Operation of RFID systems is strongly disturbed by metallic environments in the proximity of the antenna. These environments produce a detuning on the antenna, which as a side effect produce a drastic decrease in reading distance. In this paper, the authors show that it's possible to make a radical improvement on HF RFID systems performances by ret...
Article
Full-text available
An important aspect that directly affects the RFID system performances is represented by the reading distance of the RFID tags. Regarding this issue, in order to identify areas where the system provides high efficiency, we must determine the maximum reading volume of the RFID reader antenna. This paper approaches a series of mathematical models in...
Article
Location is an important fact to improve the development of autonomous entities that are embedded into ubiquitous computing environments. For the outdoor location systems, GPS seems to be the best solution, but when we want to make an indoor location of objects or humans, this system is inefficient. In this article we propose to study the indoor po...

Questions

Question (1)
Question
I need to match in impedance an microstrip antenna using HFSS. The real part of the impedance varies too much when I change the antenna structure. Is any way using lumped elements to give a certain value for the antenna impedance in order to match it with a known IC impedance? Lumped elements for normal structure of an antenna can be used for a microstrip antenna too? Thanks!

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