QoS deployment in wireless e-health and e-emergency : main issues and a case-study (2009)
Gama, Oscar, Carvalho, Paulo, Afonso, José A., Mendes, P. M.
Due to its critical nature, emergency healthcare (e-emergency) systems should be totally reliable, efficient and support real-time traffic. Therefore eemergency networks must provide proper quality...
P. M. Mendes, D. A. Durães, M. Bartek, J. H. Correia
Summary: This work reports on the use of bulk-micromachining technology to increase the efficiency of a folded shorted-patch antenna. This antenna was designed on two stacked wafers (glass bonded on...
Electrode localization in a self-organizing network for electrophysiological diagnostics (2009)
Schaefer, M., Figueiredo, M., Kiefer, S., Mendes, P.M., Ruff, R.
Towards a Reconfigurable Wireless Sensor Network for Biomedical Applications (2008)
Óscar Gama, Celso Figueiredo, Paulo Carvalho, P. M. Mendes
This work presents a study on the reconfiguration requirements of wireless sensor network for biomedical applications. It is presented a wireless platform operating in a smart suit, the required...
Quality of service support in wireless sensor networks for emergency health care services (2008)
Gama, Oscar, Carvalho, Paulo, Afonso, José A., Mendes, P. M.
The reliable and efficient operation of emergency healthcare (e-emergency) services poses quality demands to the systems and underlying communication infrastructures. In this context, most existing...
2.4 GHz wireless sensor network for smart electronic shirts (2008)
J. P. Carmo, P. M. Mendes, C. Couto, J. H. Correia
This paper presents a wireless sensor network for smart electronic shirts. This allows the monitoring of individual biomedical data, such the cardio-respiratory function. The solution chosen to...
Mendes, P. M., Polyakov, A., Bartek, M., Burghartz, J. N., Correia, J. H.
This paper reports on fabrication and design considerations of an integrated folded shorted-patch chip-size antenna for applications in short-range wireless microsystems and operating inside the...
PH-dependent gold nanoparticle self-organization on functionalized Si/SiO2 surfaces (2006)
Diegoli, S, Mendes, P. M., Baguley, E. R., Leigh, S. J., Iqbal, P, Diaz, Y. R. Garcia, ...
The self-organization of citrate- and acrylate-stabilized gold nanoparticles onto SiO2/hydroxyl-, amino- and nitro-terminated surfaces was investigated as a function of pH. Bare clean Si/SiO2...
Microantena integrada sintonizável com dimensões eléctricas reduzidas (2005)
A presente invenção está genericamente relacionada com o campo dos microssistemas com comunicações sem fios, e em particular com as microantenas integradas para microssistemas sem fios.
2.4 GHz wireless sensor network for smart electronic shirts (2005)
Carmo, J. P., Mendes, P. M., Couto, Carlos, Correia, J. H.
This paper presents a wireless sensor network for smart electronic shirts. This allows the monitoring of individual biomedical data, such the cardio-respiratory function. The solution chosen to...
Low-power low-voltage RF CMOS transceiver at 2.4 GHz (2005)
Carmo, João, Mendes, P. M., Couto, Carlos, Correia, J. H.
A radio-frequency transceiver chip was designed in a UMC RF 0.18 µm CMOS process. The target RF frequency is 2.4 GHz ISM band. A possible application of this transceiver is the integration into...
Subject age in P300 BCI (2005)
Dias, N. S., Mendes, P. M., Correia, J. H.
This paper presents a study about the amplitude, latency and distribution of P300 in twelve healthy volunteers (5 women and 7 men, aged between 19-70, with a mean of 35.5 years) that were submitted...
High-resistivity polycrystalline silicon as RF substrate in wafer-level packaging (2005)
Polyakov, A., Sinaga, S. M., Mendes, P. M., Correia, J. H., Bartek, M., Burghartz, J. N.
High-resistivity polycrystalline silicon (HRPS) is presented as a novel low-cost and low-loss substrate for radio-frequency (RF) passive components in wafer-level packaging and integrated passive...
Wireless interface for sensors in smart textiles (2005)
Ribeiro, J. C., Oliveira, S. M., Mendes, P. M., Correia, J. H.
This paper describes a smart suit with sensors and electronics for monitoring patients at hydrotherapy sessions in swimming-pools. The smart suit allows the monitoring of the heart rate, patient...
5.7 GHz on-chip antenna/RF CMOS transceiver for wireless sensors network (2005)
Carmo, J. P., Mendes, P. M., Couto, Carlos, Correia, J. H.
This paper describes a chip-size antenna for operation at 5.7 GHz, assembled with a low-power, low-voltage RF CMOS transceiver, fabricated in UMC RF CMOS 0.18 µm process. Measurements shown a patch...
A 2.4-GHz RF CMOS transceiver for wireless sensor applications (2005)
Carmo, J. P., Mendes, P. M., Couto, Carlos, Correia, J. H.
A radio-frequency transceiver chip was designed in a UMC RF 0.18 µm CMOS process. The target RF frequency is 2.4 GHz ISM band. The specifications are a sensibility of -60 dBm and a power...
A chip-size antenna for wireless EEG (2005)
Correia, J. H., Dias, N. S., Barbosa, C. A., Mendes, P. M.
This paper presents the design and characterization of a patch antenna built on lossy substrates compatible with integrated circuits fabrication. Two different substrates were used for antenna...
Wireless hydrotherapy smart suit for monitoring handicapped people (2004)
This paper presents a smart suit, water impermeable, containing sensors and electronics for monitoring handicapped people at hydrotherapy sessions in swimming-pools. For integration into textiles,...
Polyakov, A., Sinaga, S. M., Mendes, P. M., Bartek, M., Correia, J. H., Burghartz, J. N.
High-resistivity polycrystalline silicon (HRPS) wafers are explored as a novel low-cost and low-loss substrate in Wafer-Level Chip-Size Packaging (WLCSP) for RF applications. The WLCSP solution we...
An integrated folded-patch antenna for wireless microsystems (2004)
Mendes, P. M., Polyakov, A., Bartek, M., Burghartz, J. N., Correia, J. H.
A fully integrated, folded-patch antenna for operation at 5.62 GHz and application in wireless sensor networks has been realized and characterized. Overall dimensions of 4x4x1 mm3, measured bandwidth...
Bartek, M., Polyakov, A., Sinaga, S. M., Mendes, P. M., Correia, J. H., Burghartz, J. N.
High-resistivity polycrystalline silicon (HRPS) wafers are explored as a novel low-cost and low-loss substrate for radio-frequency (RF) passive components in wafer-level packaging (WLP) and...
Mendes, P. M., Polyakov, A., Bartek, M., Burghartz, J. N., Correia, J. H.
High-resistivity polycrystalline silicon (HRPS) wafers are utilized as low-loss substrates for three-dimensional integration of on-chip antennas in wafer-level chip-scale packages (WLCSP)....
Size reduction and tuning of integrated folded patch antennas using slots (2004)
Mendes, P. M., Bartek, M., Burghartz, J. N., Correia, J. H.
We report on the use of slots for size reduction and tuning of folded patch antennas operating in the 5-6 GHz ISM band, with intended application in short-range wireless communications. Varying the...
Novel very small dual-band chip-size antenna for wireless sensor networks (2004)
Mendes, P. M., Bartek, M., Burghartz, J. N., Correia, J. H.
We report on the design of a novel, very small dualband antenna having double-folded structure and suitable for onchip integration in wireless sensor network nodes. The antenna operates...
Wafer-level chip-scale packaging for low-end RF products (2004)
Bartek, M., Zilmer, G., Teomin, D., Polyakov, A., Sinaga, S. M., Mendes, P. M., ...
This paper gives a short overview of waferlevel chip-scale packaging technology and analyses its added value in the packaging of RF ICs. Particularly, the possibilities of substrate crosstalk...
On-chip CMOS wireless sensors interface for automotive applications (2004)
Carmo, João, Mendes, P. M., Couto, Carlos, Correia, J. H.
This paper describes a CMOS interface for short-range wireless sensor networks. The sensor interface is composed by the sensor readout and a transceiver in CMOS 0.18 µm process technology and a...
Mendes, P. M., Sinaga, S. M., Polyakov, A., Bartek, M., Burghartz, J. N., Correia, J. H.
High-resistivity polycrystalline silicon (HRPS) wafers are utilized as low-loss substrates for three-dimensional integration of on-chip antennas and RF passive components (e.g. large inductors) in...
Spiral inductors on silicon for wireless communications (2004)
Trabulo, Pedro, Mendes, P. M., Garrido, Paulo, Correia, J. H.
This paper presents the design and fabrication of integrated micromachined inductors obn silicon substrates. In order to reduce eddy currents in silicon substrates, bulk-micromachining technology is...
Gold nanoparticle patterning of silicon wafers using chemical e-beam lithography (2004)
Chen, Y.*, Mendes, P.M., Jacke, S., Critchley, K., Plaza, J., Nikitin, K., ...
This paper demonstrates a novel facile method for fabrication of patterned arrays of gold nanoparticles on Si/SiO2 by combining electron beam lithography and self-assembly techniques. Our strategy is...
Gold nanoparticle patterning of silicon wafers using chemical e-beam lithography (2004)
Chen, Y., Mendes, P.M., Jacke, S., Critchley, K., Plaza, J., Nikitin, K., ...
This paper demonstrates a novel facile method for fabrication of patterned arrays of gold nanoparticles on Si/SiO2 by combining electron beam lithography and self-assembly techniques. Our strategy is...
Gold nanoparticle patterning of silicon wafers using chemical e-beam lithography (2004)
Chen, Y., Mendes, P.M., Jacke, S., Critchley, K., Plaza, J., Nikitin, K., ...
This paper demonstrates a novel facile method for fabrication of patterned arrays of gold nanoparticles on Si/SiO2 by combining electron beam lithography and self-assembly techniques. Our strategy is...
Mendes, P. M., Polyakov, A., Bartek, M., Burghartz, J. N., Correia, J. H.
This paper reports on design and fabrication options of an integrated folded shorted-patch chip-size antenna for applications in short-range wireless microsystems. The antenna is built using a stack...
Folded-patch chip-size antennas for wireless microsystems (2003)
Mendes, P. M., Polyakov, A., Bartek, M., Burghartz, J. N., Correia, J. H.
We report on design and fabrication of a folded-patch chip-size antenna for operation at 5.7 GHz and use in short-range wireless communications. Application of wafer-level chip-scale packaging...
Design of a folded-patch chip-size antenna for short-range communications (2003)
Mendes, P. M., Polyakov, A., Bartek, M., Burghartz, J. N., Correia, J. H.
We report on design of an integrated folded shorted-patch (FSP) chip-size antenna for operation at 5.7 GHz and use in short-range wireless communications. Application of wafer-level chip-scale...
Efficiency improvement of a chip-size antenna for wireless microsystems (2003)
Mendes, P. M., Durães, Dalila, Bartek, M., Correia, J. H.
This work reports on the use of bulk-micromachining technology to increase the efficiency of a folded shorted-patch antenna. This antenna was designed on two stacked wafers (glass bonded on...
Mendes, P. M., Polyakov, A., Bartek, M., Burghartz, J. N., Correia, J. H.
This paper reports on fabrication and design considerations of an integrated folded shortedpatch chip-size antenna for applications in short-range wireless microsystems and operating frequency of 5.7...
Mendes, P. M., Polyakov, A., Bartek, M., Burghartz, J. N., Correia, J. H.
The measured S-parameters of a coplanar waveguide (CPW) propagating the dominant mode were used to obtain the electrical permittivity and the dielectric loss tangent of three different glass wafers:...
Integrated 5.7 GHz chip-size antenna for wireless sensor networks (2003)
Mendes, P. M., Polyakov, A., Bartek, M., Burghartz, J. N., Correia, J. H.
We report on design, fabrication and characterization of chip-size antennas for operation at 5.7 GHz and use in wireless sensor networks. Application of wafer-level chipscale packaging (WLCSP)...
Mendes, P. M., Bartek, M., Burghartz, J. N., Correia, J. H.
We report on design and characterization of chip-size antennas for operation at 6 GHz and use in wireless microsystems. Use of a glass substrate and application of wafer-level chipscale packaging...
Mendes, P. M., Bartek, M., Burghartz, J. N., Correia, J. H.
This paper reports the FEM model, design, fabrication and characterization of a square patch antenna built on high-resistivity silicon (HRS) for operation at 5.7 GHz.
Polyakov, A., Mendes, P. M., Sinaga, S. M., Bartek, M., Rejaei, B., Correia, J. H., ...
Various types of glass substrates have been compared with respect to their suitability as a low-loss substrate in wafer-level chip-scale packaging for RF applications. Processability has been...
Spiral inductors on silicon for wireless communications (2003)
Trabulo, Pedro, Durães, Dalila, Mendes, P. M., Garrido, Paulo, Correia, J. H.
This paper presents the design and fabrication of integrated micromachined inductors on silicon substrates. In order to reduce eddy currents in silicon substrates, bulk-micromachining technology is...
Analysis of chip-size antennas on lossy substrates for short-range wireless micro systems (2002)
Mendes, P. M., Correia, J. H., Bartek, M., Burghartz, J. N.
This paper presents the design and characterization of a patch antenna built on lossy substrates compatible with integrated circuits fabrication. Two different substrates were used for antenna...