A5077480295- Microwave Imaging and Scattering Analysis
- Geophysical Methods and Applications
- Wireless Body Area Networks
- Ultrasonics and Acoustic Wave Propagation
- Advanced SAR Imaging Techniques
- Millimeter-Wave Propagation and Modeling
- Indoor and Outdoor Localization Technologies
- Advancements in PLL and VCO Technologies
- Analog and Mixed-Signal Circuit Design
- Antenna Design and Analysis
- Energy Harvesting in Wireless Networks
- Photoacoustic and Ultrasonic Imaging
- Low-power high-performance VLSI design
- Microwave and Dielectric Measurement Techniques
Federal Institute of São Paulo
2020-2024
Universidade de São Paulo
2006-2022
Universidade Politecnica
2021
An improved confocal imaging algorithm is proposed for breast cancer detection using radar-based ultra wideband technology. The improvements consider a scenario of heterogeneous where the tumor mostly located near glandular tissue in ductal region displaced from center breast. robustness demonstrated waveform sets generated simulated system. results showed that use provides better identification and localization when considering dense with only 2% increase computational cost.
This work reports the realization of a microwave imaging system prototype focused on low-cost and portability. A power loss study in several breast layers has been done, pointing to 5.0 cm penetration capacity. mechanical dielectric coupling medium was proposed together with phantom made mimic internal tissues. Firmware, software protocol were developed an embedded UWB transceiver platform. The scattered collected signals applied improved confocal algorithm, preliminary results showed that...
This paper presents an evaluation of a low-cost apparatus for Stepped-Frequency Continuous Wave (SFCW) radar-based Microwave Imaging (MWI) systems aimed at breast cancer detection. Software Defined Radio (SDR) is programmable device with the potential to circumvent Vector Network Analyzer usage realize MWI system, especially during prototyping stage, once more suitable system not established yet. BladeRF, SDR platform, coupled power amplifier and low noise amplifier, using two Vivaldi...
This paper presents an assessment for a breast cancer detection microwave imaging system design, employing multi-software simulation framework. The work aimed to identify circuits design key parameters obtain quality images able reveal malignant tumors. A set of backscattering signals were extracted from 32 antenna simulated scenario, and applied proposed receiver model, including Low Noise Amplifier, Phased Locked Loop Analog Digital Converter. implementation constraints arising in the...
A study of delay deviation in CMOS tapered buffers due to transistor mismatching is presented. Theoretical relations for the were derived from buffer and parameters. To validate those relations, investigate behavior, special test structures consisting configured as ring oscillators designed a 0.35 /spl mu/m technology. The experimental results are consistent with proposed they show that small taper factors produce higher deviations. An increase 23% standard observed when factor reduced 6 2.9.
This work reports a control platform development for low-cost and portable medical imaging breast cancer detection system. Firmware was developed from scratch contemplating the hardware control, automated internal sweeping routines, attending personal computer queries via USB communication. Custom commands were implemented external communication employing simple effective ASCII protocol. The allows both technician exam operator to interact with register level elaborated enabling advanced...
This paper presents an Ultra Wideband (UWB) synthetic pulse implementation based on Stepped Frequency Continuous Wave signal modulation aiming at short-range imaging. Microwave imaging is a promising modality for human abnormalities screening and detection, such as women's breast cancer. It takes advantage of the different electromagnetic wave reflectivity between healthy unhealthy tissues, providing some benefits against other modalities. A UWB must be employed high resolution seeking to...
Abstract This paper presents a Microwave Imaging apparatus for breast cancer detection, aiming at early diagnosis, an effective way of reducing mortality rates. In 2020, has surpassed lung cases worldwide, with more impact in low-income countries, which motivates seeking non-invasive and affordable screening equipment. Focusing on low-cost portability, US$150.00 embedded hardware transceiver plus antennas platform been picked out, together the development dry-coupling silicone rubber bra...