
Adrian Ioan PetrariuŞtefan cel Mare University of Suceava | USV · Faculty of Electrical Engineering and Computer Sciences
Adrian Ioan Petrariu
Doctor of Engineering
About
45
Publications
25,711
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832
Citations
Introduction
Additional affiliations
October 2014 - present
October 2009 - October 2012
Education
October 2009 - February 2013
October 2004 - July 2009
Publications
Publications (45)
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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-...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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)
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!