UFSC » LRF - Radio Frequency (Integrated Circuits) Research Laboratory
Page of LRF – Radio Frequency Laboratory at UFSC

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.


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)

Final Year project on Low Voltage/Low Power oscillator
Publicado em 06/12/2014 às 21:31

Last Friday, Rodrigo Rottava presented his Final Year Project on Low Voltage/Low Power oscillators entitled:  Analysis and Design of a Colpitts Oscillator with Double Positive Feedback Operating in High Frequency and LowVoltage/Low Power. (Slides here)


Our team by february 2014
Publicado em 04/09/2014 às 11:40

These people are very proud of being THE RF RESEARCH GROUP at UFSC.

Circuits and Systems for WBAN – Talk at NUTES
Publicado em 04/09/2014 às 11:38

         Fernando_NUTES   The GRF/LRF work on WBAN was the subject of a talk by Prof. Rangel at NUTES (Núcleo de Tecnologias Estratégicas em Saúde).

    On occasion, the GRF researcher presented an overview of WBAN research being conducted by the Research Group on Radio Frequency at UFSC, with emphasis on: a) the transmission of wireless power for miniaturized implants; b) Characterisation of the human body communication channel; c) integrated temperature sensor powered by RF; d) energy harvesting body temperature.


GRF  believes that  WBAN is the way for innovation in the next 25 years, however, to be successful the WBAN should consume low power and should operate without bulky batteries, so that they can be used or implanted, which are some of the challenges for circuit and system designers.




Available positions !
Publicado em 09/07/2014 às 19:05

We are offering two opportunities for research assistants in undergraduate level (BOLSA DE INICIAÇÃO CIENTÍFICA).  The selected candidates will do  research on the following subjects:

  1. Energy Harvesting
  2. RFIC built-in selft-test and self-repair
  3. RF instrumentation and measurement

Context: Ultra low power devices for Wireless Body Area Networks (WBAN). For medical applications the consumption

is the most critical design parameter, especially in implanted devices where it is inconvenient or impossible to replace the
battery. Therefore, we try to employ solutions such as: battery recharging via energy transfer or magnetic coupling, harvest of available energy in the environment.

PIBIC Requirements.

  • Full time undergraduate student (without other grant or work) whit interest in developing research activities (20 hours per week).
  •  IA (IAA) more than 7.
  •  Have done at least one course of electrical circuits.
  •  Skills which are relevant:
  1. Independence: being able to work without close supervision, managing your own time and projects.
  2. Critical thinking: being able to evaluate your work and that of others, making judgments about the value of information and drawing conclusions from data.
  3. Problem solving: working without “a right answer” and devising strategies to work towards a solution.
  4. Contributing as a professional: presenting work to your peers, managing discussions and defending your position, having the confidence to put forwards ideas to senior staff.
  5. Initiative: having the confidence to make decisions and act on them, not waiting for approval to do basic tasks, but reporting back responsibly at appropriate times.

Some PIBIC Benefits

  • Favorable framework to develop research abilities such as: research methods, problem solving, argument construction, preparation and prioritization, and time management.
  • The “Ciência sem fronteiras” program prefers the candidates who have been enrolled in some scientific initiation program.
  • Grant for twelve (12) months beginning on August (2014).

What to do?

You must send email with your resume (showing your skills, experience, and achievements) to schedule an appointment for the personal interview, before 22 july.
These interviews will be on 24 and 25 july (2014).

Contact :
Arturo Fajardo. arfaja1979@gmail.com
Paulo Marcio Moreira. p.marcio.moreira@gmail.com

Or, send us a message using the form found here.


Workshop on RF and mmW
Publicado em 04/04/2014 às 13:59


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