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Manuel Pérez
Department of Electronic Engineering, Pontificia Universidad Javeriana, Bogotá 110311, Colombia

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Short Biography

Manuel Pérez received his PhD (2013) in Electronics and Communications Engineering and his MSc (2009) in Wireless Communications from the Politecnico di Torino (PT), Italy; and his B.E (2010) in Electronics Engineering from the Pontificia Universidad Javeriana (PUJ), Colombia. From 2009 to 2013, he was a research assistant with iXem Labs (PT) and the Laboratorio di Antenne e Compatibilita Elettromagnetica at the Istituto Superiore Mario Boella, Torino, Italy. He is now associate professor in the Electronics Department at PUJ. His research interests also include computational electromagnetics, antenna design, radar, IoT and electromagnetic compatibility.

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Journal article
Published: 16 July 2021 in Electronics
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This paper explores the design of a Class-E amplifier with finite DC-feed inductance using three tuning methods. Furthermore, this work quantifies the impacts of the tuning process (referred to in this paper as the tuning effect) on the main figures of merit (FoMs) of this amplifier. The tuning goals were to guarantee two conditions: zero voltage and zero voltage derivative switching (i.e., soft-switching tuning). To the best of the authors’ knowledge, systematic tuning methods have not been analyzed before for this amplifier topology. Two of them are based on the iterative component tuning process, and they have been explored previously in the design of the conventional class-E amplifier with an RF choke inductance. The last tuning method explores the simultaneous adjustment of the control signal period and one amplifier capacitor. The analyzed tuning methods were validated by extensive simulations of case studies, which were designed following the power specifications of the Qi standard. In 100% and 96% of the case studies, zero voltage switching (ZVS) and zero-derivative voltage switching (ZDS) were achieved, respectively. Furthermore, we identified an unexpected behavior in the tuning process (referred to in this paper as the turning point), which consisted of a change of the expected trend of the soft-switching (i.e., ZVS and ZDS) point, and it occurred in 21% of the case studies. When this behavior occurred and converged to at least ZVS, the tuning process required more iterations and a large number of tuning variables. Additionally, after the tuning process, the total harmonic distortion and output power capacity were improved (i.e., in 78% and 61% of the case studies, respectively), whereas the output power, drain and added power efficiencies deteriorated (i.e., in 83%, 61% and 65% of the case studies, respectively) in the overall case studies. However, we could not identify an improvement in the overall FoMs related to the soft-switching tuning. Furthermore, the tuning impact was significant and produced some improvements and some deleterious effects for the FoMs in each case study, without a clear trend by FoMs or by tuning method. Therefore, the amplifier designer may choose the more favorable tuning method and the related FoM trade-offs for the required design specifications.

ACS Style

Ingrid Casallas; Robert Urbina; Carlos-Ivan Paez-Rueda; Gabriel Perilla; Manuel Pérez; Arturo Fajardo. Analysis of the Soft-Switching Tuning Effect on the Figures of Merit Involved in the Design of a Class-E Amplifier with Finite DC-Feed Inductance. Electronics 2021, 10, 1705 .

AMA Style

Ingrid Casallas, Robert Urbina, Carlos-Ivan Paez-Rueda, Gabriel Perilla, Manuel Pérez, Arturo Fajardo. Analysis of the Soft-Switching Tuning Effect on the Figures of Merit Involved in the Design of a Class-E Amplifier with Finite DC-Feed Inductance. Electronics. 2021; 10 (14):1705.

Chicago/Turabian Style

Ingrid Casallas; Robert Urbina; Carlos-Ivan Paez-Rueda; Gabriel Perilla; Manuel Pérez; Arturo Fajardo. 2021. "Analysis of the Soft-Switching Tuning Effect on the Figures of Merit Involved in the Design of a Class-E Amplifier with Finite DC-Feed Inductance." Electronics 10, no. 14: 1705.

Journal article
Published: 30 May 2021 in Electronics
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This paper proposes new closed expressions of self-impedance using the Method of Moments with the Point Matching Procedure and piecewise constant and linear basis functions in different configurations, which allow saving computing time for the solution of wire antennas with complex geometries. The new expressions have complexity O(1) with well-defined theoretical bound errors. They were compared with an adaptive numerical integration. We obtain an accuracy between 7 and 16 digits depending on the chosen basis function and segmentation used. Besides, the computing time involved in the calculation of the self-impedance terms was evaluated and compared with the time required by the adaptative quadrature integration solution of the same problem. Expressions have a run-time bounded between 50 and 200 times faster than an adaptive numerical integration assuming full computation of all constant of the expressions.

ACS Style

Carlos-Ivan Paez-Rueda; Arturo Fajardo; Manuel Pérez; Gabriel Perilla. Closed-Form Expressions for Numerical Evaluation of Self-Impedance Terms Involved on Wire Antenna Analysis by the Method of Moments. Electronics 2021, 10, 1316 .

AMA Style

Carlos-Ivan Paez-Rueda, Arturo Fajardo, Manuel Pérez, Gabriel Perilla. Closed-Form Expressions for Numerical Evaluation of Self-Impedance Terms Involved on Wire Antenna Analysis by the Method of Moments. Electronics. 2021; 10 (11):1316.

Chicago/Turabian Style

Carlos-Ivan Paez-Rueda; Arturo Fajardo; Manuel Pérez; Gabriel Perilla. 2021. "Closed-Form Expressions for Numerical Evaluation of Self-Impedance Terms Involved on Wire Antenna Analysis by the Method of Moments." Electronics 10, no. 11: 1316.

Journal article
Published: 21 April 2021 in Applied Sciences
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This paper proposes an analytical expression set to determine the maximum values of currents and voltages in the Class-E Power Amplifier (PA) with Finite DC-Feed Inductance (FDI) under the following assumptions—ideal components (e.g., inductors and capacitors with infinite quality factor), a switch with zero rise and fall commutation times, zero on-resistance, and infinite off-resistance, and an infinite loaded quality factor of the output resonant circuit. The developed expressions are the average supply current, the RMS (Root Mean Square) current through the DC-feed inductance, the peak voltage and current in the switch, the RMS current through the switch, the peak voltages of the output resonant circuit, and the peak voltage and current in the PA load. These equations were obtained from the circuit analysis of this ideal amplifier and curve-fitting tools. Furthermore, the proposed expressions are a useful tool to estimate the maximum ratings of the amplifier components. The accuracy of the expressions was analyzed by the circuit simulation of twelve ideal amplifiers, which were designed to meet a wide spectrum of application scenarios. The resulting Mean Absolute Percentage Error (MAPE) of the maximum-rating constraints estimation was 2.64%.

ACS Style

Ingrid Casallas; Carlos-Ivan Paez-Rueda; Gabriel Perilla; Manuel Pérez; Arturo Fajardo. Design of the Class-E Power Amplifier with Finite DC Feed Inductance under Maximum-Rating Constraints. Applied Sciences 2021, 11, 3727 .

AMA Style

Ingrid Casallas, Carlos-Ivan Paez-Rueda, Gabriel Perilla, Manuel Pérez, Arturo Fajardo. Design of the Class-E Power Amplifier with Finite DC Feed Inductance under Maximum-Rating Constraints. Applied Sciences. 2021; 11 (9):3727.

Chicago/Turabian Style

Ingrid Casallas; Carlos-Ivan Paez-Rueda; Gabriel Perilla; Manuel Pérez; Arturo Fajardo. 2021. "Design of the Class-E Power Amplifier with Finite DC Feed Inductance under Maximum-Rating Constraints." Applied Sciences 11, no. 9: 3727.

Journal article
Published: 11 January 2021 in Electronics
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Atmospheric Water Generators (AWG) are a promising technology solution to the water scarcity in the world. However, their main drawback is the high power consumption. This paper presents the experimental optimization process of a Portable Atmospheric Water Generator (PAWG) prototype based on a thermometric cooler. This process was developed by an exhaustive search of the experimental solution space, which was generated by parametric sweeps of two parameters (i.e., control voltages in the PAWG), which are related to the power consumption of the PAWG and the physical variables involved in the water condensation process (i.e., the airflow and the temperature on the water condenser element). As a result, we found the existence of two optimal operation points under a constant value of relative humidity; one of them maximizes the amount of water generated, and the other one maximizes the system performance (i.e., the ratio between the generated water and consumed power in mL/Wh). The resulting Figures of Merit (FoMs) of the PAWG prototype were 0.33 mL/h of generated water and 0.22 mL/Wh for the system performance.

ACS Style

Ingrid Casallas; Manuel Pérez; Arturo Fajardo; Carlos-Ivan Paez-Rueda. Experimental Parameter Tuning of a Portable Water Generator System Based on a Thermoelectric Cooler. Electronics 2021, 10, 141 .

AMA Style

Ingrid Casallas, Manuel Pérez, Arturo Fajardo, Carlos-Ivan Paez-Rueda. Experimental Parameter Tuning of a Portable Water Generator System Based on a Thermoelectric Cooler. Electronics. 2021; 10 (2):141.

Chicago/Turabian Style

Ingrid Casallas; Manuel Pérez; Arturo Fajardo; Carlos-Ivan Paez-Rueda. 2021. "Experimental Parameter Tuning of a Portable Water Generator System Based on a Thermoelectric Cooler." Electronics 10, no. 2: 141.

Journal article
Published: 08 December 2020 in Applied Sciences
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The Class-E with finite feed inductance is a high-efficiency power amplifier that generally uses complex, long, and iterative design procedures. In this paper, we detail a design methodology that is based on an analytical model of this amplifier. This methodology explores the power amplifier design by the use of a symbolic mathematical tool, which was developed in the software Maple™. This approach helps to understand the Class-E circuit topology and it offers a fast and easy design procedure without having to examine, in-depth, the model analytical equations.

ACS Style

Ingrid Casallas; Carlos-Ivan Paez-Rueda; Gabriel Perilla; Manuel Pérez; Arturo Fajardo. Design Methodology of the Class-E Power Amplifier with Finite Feed Inductance—A Tutorial Approach. Applied Sciences 2020, 10, 8765 .

AMA Style

Ingrid Casallas, Carlos-Ivan Paez-Rueda, Gabriel Perilla, Manuel Pérez, Arturo Fajardo. Design Methodology of the Class-E Power Amplifier with Finite Feed Inductance—A Tutorial Approach. Applied Sciences. 2020; 10 (24):8765.

Chicago/Turabian Style

Ingrid Casallas; Carlos-Ivan Paez-Rueda; Gabriel Perilla; Manuel Pérez; Arturo Fajardo. 2020. "Design Methodology of the Class-E Power Amplifier with Finite Feed Inductance—A Tutorial Approach." Applied Sciences 10, no. 24: 8765.

Journal article
Published: 11 January 2020 in Future Internet
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This paper proposes an architecture for biometric electronic identification document (e-ID) system based on Blockchain for citizens identity verification in transactions corresponding to the notary, registration, tax declaration and payment, basic health services and registration of economic activities, among others. To validate the user authentication, a biometric e-ID system is used to avoid spoofing and related attacks. Also, to validate the document a digital certificate is used with the corresponding public and private key for each citizen by using a user’s PIN. The proposed transaction validation process was implemented on a Blockchain system in order to record and verify the transactions made by all citizens registered in the electoral census, which guarantees security, integrity, scalability, traceability, and no-ambiguity. Additionally, a Blockchain network architecture is presented in a distributed and decentralized way including all the nodes of the network, database and government entities such as national register and notary offices. The results of the application of a new consensus algorithm to our Blockchain network are also presented showing mining time, memory and CPU usage when the number of transactions scales up.

ACS Style

Rafael Páez; Manuel Pérez; Gustavo Ramírez; Juan Montes; Lucas Bouvarel. An Architecture for Biometric Electronic Identification Document System Based on Blockchain †. Future Internet 2020, 12, 10 .

AMA Style

Rafael Páez, Manuel Pérez, Gustavo Ramírez, Juan Montes, Lucas Bouvarel. An Architecture for Biometric Electronic Identification Document System Based on Blockchain †. Future Internet. 2020; 12 (1):10.

Chicago/Turabian Style

Rafael Páez; Manuel Pérez; Gustavo Ramírez; Juan Montes; Lucas Bouvarel. 2020. "An Architecture for Biometric Electronic Identification Document System Based on Blockchain †." Future Internet 12, no. 1: 10.

Book chapter
Published: 20 December 2017 in Robots Operating in Hazardous Environments
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This chapter presents an approach for explosive-landmine detection on-board an autonomous aerial drone. The chapter describes the design, implementation and integration of a ground penetrating radar (GPR) using a software defined radio (SDR) platform into the aerial drone. The chapter?s goal is first to tackle in detail the development of a custom-designed lightweight GPR by approaching interplay between hardware and software radio on an SDR platform. The SDR-based GPR system results on a much lighter sensing device compared against the conventional GPR systems found in the literature and with the capability of re-configuration in real-time for different landmines and terrains, with the capability of detecting landmines under terrains with different dielectric characteristics. Secondly, the chapter introduce the integration of the SDR-based GPR into an autonomous drone by describing the mechanical integration, communication system, the graphical user interface (GUI) together with the landmine detection and geo-mapping. This chapter approach completely the hardware and software implementation topics of the on-board GPR system given first a comprehensive background of the software-defined radar technology and second presenting the main features of the Tx and Rx modules. Additional details are presented related with the mechanical and functional integration of the GPR into the UAV system.

ACS Style

Manuel Ricardo Pérez Cerquera; Julian David Colorado Montaño; Julian David Colorado Montaño And Iván Mondragón. UAV for Landmine Detection Using SDR-Based GPR Technology. Robots Operating in Hazardous Environments 2017, 1 .

AMA Style

Manuel Ricardo Pérez Cerquera, Julian David Colorado Montaño, Julian David Colorado Montaño And Iván Mondragón. UAV for Landmine Detection Using SDR-Based GPR Technology. Robots Operating in Hazardous Environments. 2017; ():1.

Chicago/Turabian Style

Manuel Ricardo Pérez Cerquera; Julian David Colorado Montaño; Julian David Colorado Montaño And Iván Mondragón. 2017. "UAV for Landmine Detection Using SDR-Based GPR Technology." Robots Operating in Hazardous Environments , no. : 1.