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Page of LRF – Radio Frequency Laboratory at UFSC

LRF team wons third place in the national final of the contest “IDEAS FOR MILK” promoted by EMBRAPA (Equipe do LRF fica em terceiro lugar na final nacional do concurso “IDEAS FOR MILK” promovido pela EMBRAPA)
Publicado em 31/12/2016 às 22:29


Work under development at LRF  won the third place in the national  final of the  contest “IDEAS FOR MILK” promoted by EMBRAPA. The project is  the result of more than six  years of research, involving undergraduate and graduate students.  Initially, the focus was on the petroleum  extraction sites, where the knowledge of the  water-oil fraction during the oil  extraction carried relevant information about the well. merchanDivulgaUFSC1A microwave resonant cavity based sensor has been used in this context.  More recently, the group started looking for new applications for the sensor, in particular those where there is a correlation between  the electrical permittivity and a property of interest. This is the case of  milk,  where the total of solids (mainly fat) defines the quality of the product and is submitted to specific regulations.  Fortunately, we can correlate the amount of total solids (or fat) with the electrical permittivity of the milk using our microwave sensor. For the contest, we proposed to use it to  improve the accuracy  of the milk  production process in real time.  The research is conducted by  prof. Fernando Rangel and  prof. Daniel  Pagano, by the PhD students Heron Ávila e Roddy Romero and  by the undergraduate student Celso Leite.







Goodbye lunch
Publicado em 14/12/2016 às 14:20

 This week, our members gathered for the goodbye lunch of our dear colleague Juan Moya.

After recently obtaining his MSc. degree, he is heading back to his mother country Colombia.

We wish him the best in his future endeavours. Good luck Juan!



Master Thesis defense: Juan Baquero
Publicado em 18/10/2016 às 0:11

The MSc. candidate, Juan Moya Baquero, successfully presented his thesis entitled : Miniaturized low-power RFID tag for object identification purposes.



Conference on ECT by Prof. Wuqiang (IEEE Fellow)
Publicado em 17/09/2016 às 10:42

Prof. Wuqiang Yang  is visiting us during this week. We are discussing research collaboration in the field of  RF/Microwave Instrumentation and Measurement.

Prof. Wuqiang Yang is an IEEE Fellow and he is professor at the School of Electrical and Electronic Engineering at The University of Manchester, UK.



 During his stay he will offer the  lecture:

“Current status of industrial tomography and applications of ECT “

Date: 19/09/2016   at 15h30



Summary of the lecture

Although multiphase flow measurement has been a research topic for many years, it still presents great challenges in industry, such as in the oil, pharmaceutical, petrochemical and power industries. As a non-intrusive imaging and measurement technique, industrial tomography has been developed since 1980s. One of the most important targets of industrial tomography is multiphase flow measurement. In the past 30 years, various industrial tomography modalities have been developed, including (from high frequency to low frequency) gamma-ray, x-ray, optical, near infrared, THz, microwave, capacitance, resistance, magnetic and ultrasonic. This talk intends to review the current status of industrial tomography. Among various industrial tomography techniques, electrical capacitance tomography (ECT) is most mature and has biggest potential for industrial applications. ECT has been used to investigate gas/oil/water flow measurement, pharmaceutical fluidised beds, circulating fluidised beds and in other applications. It is foreseen that ECT will make more social and economic impact than any other industrial tomography modalities, in particular in clean use of coal, which is very important for protection of the environment by reducing PM2.5.



Professor Wuqiang Yang (FIET, FInstMC, FIEEE, CEng)  received his BEng (Distinction) 1982, MSc 1985 and PhD (Distinction) 1988, from Tsinghua University. After 3 years as a Lecturer at Tsinghua University, he joined UMIST in 1991. His research is focused on electrical capacitance tomography (ECT), has published 300 papers and a book “Sensor Array“, and holds 10 patents, including 2 WO patents, which have been licensed to industry. He is an Associate Editor ofIEEE Trans. IM and an editorial board member of 7 other journals, including Meas. Sci. Technol. and Sensor Review, and reviews papers for 40 journals, including 6 IEEE journals. He has been invited by many universities and research institutions worldwide and international conferences to give lectures/seminars/keynotes. He is a visiting professor at 8 universities, including Tsinghua University. He is recognised by International Center for Scientific Research (France), as one of top 30 technology researchers in the world, and Intota as an expert. Since 2010, he is an IEEE IMS Distinguished Lecturer. His biography has been included in Who’s Who in the World, Who’s Who in Science and Eng. and Who’s Who in America since 2002. In 2006 he received Global Research Award from the Royal Academy of Eng. and took sabbatical leave atMassachusetts Institute of Technology (MIT) in USA as a visiting professor. He has received many awards, including 1997 IEE/NPL Wheatstone Measurement Prize, 1997 Honeywell Prize from InstMC, 2000 IEE Ayrton Premium, 2008 Outstanding Organization award from IEEE IM Society, 2009 Valued Reviewer from Sensors and Actuators journal, 2009 IET Innovation Award Finalist, and 2010 Outstanding Reviewer from Sensor Review journal. He was an honorary chairman of IEEE Int. Conference on Imaging Systems and Techniques and will be the General Chair of 2018 IEEE International Instrumentation and Measurement Technology Conference (I2MTC’2018), which will be held in Manchester. He organised 2 special issues in 2013 for IEEE Trans. IM and Meas. Sci. Technol. as a Guest Editor. He is a panel member of NSFC and a reviewer for 973. He has just been awarded Invitation Fellowship by Japanese Society for the Promotion of Science.


Chip in the Mountains
Publicado em 31/08/2016 às 16:31

Our members are now presenting their works at the SBCCI and INSCIT conferences.

More information on the event website.


Paper accepted at IEEE T-MTT!
Publicado em 19/08/2016 às 22:29

The paper “Achieving Optimal Efficiency in Energy Transfer to a CMOS Fully-Integrated Wireless Power Receiver,” was accepted  for publication in IEEE Transactions on Microwave Theory and Techniques. (read it here)


New Chips in the Lab
Publicado em 28/07/2016 às 0:58

Student Projects 2016: New chips arrived for testing


 double_osc arturo

We received a new chip fabricated by CEITEC
Publicado em 27/07/2016 às 15:49

Several projects were fabricated using the multi-user project from CEITEC (PMUB). We are very proud of having chips delivered by a Brazilian company!



New paper published
Publicado em 27/07/2016 às 10:48


Prof. Rangel @ University of Manchester
Publicado em 27/07/2016 às 5:22

Prof. Rangel visited The University of Manchester between 11/2015 and 02/2016. There he worked designing resonant cavity sensors  at the Industrial process tomography (IPT).  At Manchester, Prof. Rangel was hosted by Prof. Wuqiang Yang.


cavity yang_rangel


Visit of Prof. Maysam Ghovanloo (Georgia Tech – USA)
Publicado em 27/07/2016 às 0:01

 (Nov/2015) We are honoured of having the visit of Prof. Maysam Ghovanloo!


maysan_rangel Maysam


Open Posdoc position
Publicado em 07/04/2016 às 22:47

Our group has opened a Posdoc position. Any interested candidate on working with RFID/ SDR transceivers and related subjects may contact us through our opportunities page.

Works about WBAN and efficiency are presented in International Congress in Florianopolis
Publicado em 06/04/2016 às 12:43

Our PhD. student, Arturo Fajardo, presented four papers in the last edition of LASCAS / IBERCHIP, last February in Florianópolis – Brazil.  These works are related to energy and power management in WBAN sensor nodes. Read the articles and presentation slides on our publications page.

Second Workshop on RF and Microwave Technology
Publicado em 18/11/2015 às 22:19


Qualify Exam (25-NOV-2015): Sensor baseado em cavidade ressonante para medir fração de água em escoamento de duas fases (água/óleo) com rastreamento automático da frequência de ressonância
Publicado em 09/11/2015 às 23:28


Best paper award (3rd place) in SBCCI 2015
Publicado em 15/09/2015 às 23:28

  The paper “A 25-dBm 1-GHz Power Amplifier Integrated in CMOS 180nm

for Wireless Power Transferring“was awarded as the  third best paper of the

28th Symposium on Integrated Circuits and Systems Design. (slides here)

Captura de tela de 2015-11-09 23:05:02

Lecture: Computational Intelligence for Motion Analysis: A Sensor Fusion Perspective
Publicado em 15/09/2015 às 11:05


Thanks Dr. Brum



The Technical Chapter IEEE-IMS / CAS / COMMSOC (Florianópolis / South) invites you to the lecture Computational Intelligence for Motion Analysis: A Sensor Fusion Perspective by Dr. Carolina Brum Medeiros.


  • Date: 16th September, 2015
  • Time: 10:00 am.
  • Local: Auditorium of the Electrical Engineering Department of Federal University of Santa Catarina (Teixerão), Florianópolis-SC.

Download Lecture details.


Lecture: Unobtrusive Smart Sensing and Pervasive Computing for Healthcare
Publicado em 02/08/2015 às 22:05


Thanks Prof. Postolache!



The Technical Chapter IEEE-IMS / CAS / COMMSOC (Florianópolis / South) invites you to the lecture Unobtrusive Smart Sensing and Pervasive Computing for Healthcare by Prof. Octavian Postolache, in the framework of the Distinguished Lecturer Program of the IEEE Instrumentation and Measurement Society.


  • Date: 07th August, 2015
  • Time: 10h00
  • Local: Auditorium of the Electrical Engineering Department of Federal University of Santa Catarina, Florianópolis-SC.

Download Lecture details.


WBAN presentation at CEFET-MG
Publicado em 21/07/2015 às 14:26


  wban Professor Fernando Rangel presented the research activities conducted at UFSC Radiofrequency Lab for students and researchers of CEFET-MG. (slides here)

Proposta de TCC 2015/2
Publicado em 10/07/2015 às 9:05


BannerLRF_TCC2015-2 As diferentes tecnologias voltadas à instrumentação na área de petróleo e gás estão em ascensão. Aplicações baseadas em circuitos de RF e sensores eletromagnéticos são o foco desta proposta, que visa a elaboração de soluções práticas e de baixo custo para solucionar os diferentes problemas encontrados na indústria.O trabalho deverá ser realizado com o auxílio de uma ferramenta profissional de simulação eletromagnética e de CFD no Laboratório de Radiofrequência em parceria com o Laboratório Experimental de Escoamentos Multifásicos da UFSC.Para maiores informações: heron.eduardo.avila@gmail.com / rangel.fernando@gmail.com

Baixar proposta em pdf



Published in Electronics Letters
Publicado em 23/12/2014 às 6:00




DOI:  10.1049/el.2014.3800 

Published in Journal of Analog Integrated Circuits and Signal Processing
Publicado em 23/12/2014 às 0:00

srg_paperDOI: 10.1007/s10470-014-0473-z


Published in Journal of Integrated Circuits and Systems
Publicado em 22/12/2014 às 0:21


2014 Dinner
Publicado em 20/12/2014 às 17:57


Final Year Project on Metamaterial-Inspired Sensors
Publicado em 09/12/2014 às 23:20


Renato Feitoza presented his Final Year Project on Metamaterial-Inspired Sensors entitled: “ Design of miniaturized antennas based on metamaterials for passive sensing applied to internet of things (IoT) “. (pdf)

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