Silas Yamamoto Email & Phone Number

State Of São Paulo, Brazil

Campinas Area, Brazil

#5G Open RAN Macrocell Radio Unit (on going)- TRX RF Front End architecture design- Development of 40W Power Amplifier Module (Doherty) with DPD linearization & Power Supply Digital Control for GaN devices#Transport & Inspection UAS (Drone) for application in Oil Company- Development of RF Communication Systems- RF Hardware development, including RF PCB layout design rules and review, survey tests & prototype debug.#4G LTE & 5G New Radio Base Station Indoor… Show more #5G Open RAN Macrocell Radio Unit (on going)- TRX RF Front End architecture design- Development of 40W Power Amplifier Module (Doherty) with DPD linearization & Power Supply Digital Control for GaN devices#Transport & Inspection UAS (Drone) for application in Oil Company- Development of RF Communication Systems- RF Hardware development, including RF PCB layout design rules and review, survey tests & prototype debug.#4G LTE & 5G New Radio Base Station Indoor Booster- Development of Multi-Band Antennas & assembly- RF Hardware development including RF PCB layout design & review, tests & measurements, prototype debug and adjustment.#4G Advanced LTE Base Station- 40W Doherty LDMOS Power Amplifier Design Review- Predistortion Linearization System Review- Support for Production & Test at Tropico company# 4G LTE UE (Vehicle Terminal) for IoT in Agriculture & Mining Field Application- Design update and review of RF Front-End - RF Multilayer PCB stackup analysis and definition- Development of RF devices and circuits- Prototype evaluation test, debug and optimization- Check of pre-conformance RF requirements to 3GPP standards# VHF/UHF SDR (Software-Defined Radio) RF Front-End- System architecture design- Firmware specification for Control & Operation- Technical support of design team- Review of RF circuits, PCB, and electromechanical assembly- Test jig design, prototype evaluation test, debug and optimization Show less

Campinas Area, Brazil

# RF and antenna engineering development and Project Coordination - RF front-end of RFID reader equipments - RF systems for RFID applications - UHF planar antenna and RFID tag antenna for mass production - Definition of RF and IC test equipments for laboratory# Analog and RF module Designer Participation in 3 generation RFID transponder IC’s - RFID ultra-low power modules (Schmitt-trigger, Level shifter, Limiter, Oscillator, RF Modulator)# RFID mixed signal… Show more # RF and antenna engineering development and Project Coordination - RF front-end of RFID reader equipments - RF systems for RFID applications - UHF planar antenna and RFID tag antenna for mass production - Definition of RF and IC test equipments for laboratory# Analog and RF module Designer Participation in 3 generation RFID transponder IC’s - RFID ultra-low power modules (Schmitt-trigger, Level shifter, Limiter, Oscillator, RF Modulator)# RFID mixed signal IC integration - Analog and RF front-end top simulation - Impedance and power matching analysis - IC integration, packaging definition and assemblies design for lab evaluation and interface with application level - IC evaluation (die, packaged, PCB assembly, and tag inlay assembly)One IC and tag are used in the commercial electronic toll collection Sem Parar Show less

Campinas Area, Brazil

# RF IC design team leader - Team coordination - Participation in the elaboration of project proposals# IC RF module designer - Amplifiers for 2.4 GHz cordless phone and satellite TV receiver - Voltage controlled oscillator (VCO) for 2.4 GHz wireless sensor network communications# RF engineering - Support for RF testing - Participation in the definition of test lab equipments - RF development training

Grenoble Area, France

- Design the System-in-Package (SiP) integration of 60 GHz transceiver for wireless high-definition multimedia interface (HDMI) - Research on IC system integration and package technologies for millimeter-wave applications

Campinas Area, Brazil

# Design Team coordination - Development of W-CDMA high-power amplifiers and power amplifier linearization system - Development of microwave integrated circuits (MIC) devices and multi-chip module (MCM) RF passive components - Development of multi-band planar antennas# RF Engineer - Participation in the research and the development of MIC and MCM integration technologies for RF applications - Support in RF design and measurements

Campinas Area, Brazil

- Development of RF transmitter (2.4 GHz ISM band) for personal safety beacon, RDS FM receiver for automotive alarm, and automotive AM/FM band active antenna- Support for the RF testing in the production of automotive parts- Problem solving on automotive electronic products

Guarulhos (São Paulo Area), Brazil

- Management and contribution in the project nationalization of radio equipment- Technical interface in the external development of RF MMICs (Monolithic MIC)

Yokohama, Kanagawa, Japan

- Development of RF devices: low-noise amplifiers (LNA), synthesizers, and signal amplifiers- Development of MIC devices: switches, and broadband power amplifier

Guarulhos (São Paulo Area), Brazil

- Development of RF power amplifiers and radio equipment- Development of analog and mixed-signal modules: signal monitoring, and voice service channel- Participation in the nationalization of radio communication equipment- Product engineer of D-AMPS cell phones, power amplifier and DC-DC converter- Participation in the implementation of ISO9000 quality system in the development engineering- ISO9000 internal audits as certified auditor

Atibaia, Brazil

- Development of PC (personal computer) electronic keyboards- Development of electronic test jigs for the production of automotive partsThe company received Ford Q1 certification (quality standards and requirements)

Msc, Electrical Engineering - Microelectronics

MsC Thesis: System-in-Package (SiP) integration of a 60 GHz transceiver for wireless high definition multimedia interface (HDMI).

Specialized Msc, Microelectronics

Activities and Societies: - Internship at STMicroelectronics (Grenoble and Crolles sites) - Team technical work at Kemesys (Peynier.

Graduation, Electrical Engineering (Electronic And Electrotechnical)

Activities and Societies: - Monografy: IC (Integrated Circuit) Design for Testability (DFT) - Internship at Elebra Telecom (Campinas.

Technician, Electrotechnical

Activities and Societies: - Internship at General Electric do Brasil (Campinas, Brasil): Development of insulation for electrical cable.