Hands-on design experience from baseband to mmWave, and from bare-metal firmware to embedded Linux. Below is a sample of the techniques and tools brought to each engagement.
RF & Analog Board Design
End-to-end RF and analog signal chains, optimized between noise, linearity and dynamic range.
- Up/down-conversion: direct-modulation vs. IF mixing, SSB/DSB, spur analysis & mitigation
- Gain control chains; broadband, high-dynamic-range amplification & variable attenuation
- Discrete LNA & PA designs, bias networks, ALC circuits
- RF switch matrices, combiners, loopback, power detection & triggering (half/full duplex)
- Synthesizers: OCXO/VCXO/TCXO references, DDS / VCO / YIG, integer & fractional PLLs
- Power: buck/boost/buck-boost switchers, LDOs, RPP & ESD protection
SDR, High-Speed Digital & Phased Arrays
Direct-RF software-defined radio and the high-speed data path behind modern radios and EW systems.
- Direct-RF SDR architectures with ultra-high instantaneous bandwidth
- High-speed data converters: 20+ GSPS ADCs/DACs, clocking & JESD204 interfaces
- FPGA signal processing on AMD Versal adaptive SoCs
- mmWave phased arrays with hybrid (analog + digital) beamforming
- Aperture-fed antenna elements; broadband, efficient RF power amplifier modules
- Electronic-warfare and defense sub-system development
Microwave Structures & Antennas
Distributed structures and antennas in PCB (FR4, Rogers, Teflon) and on-chip (Si) media.
- Lumped-element & ceramic filters; switchable banks; varactor-tunable filters
- Transmission lines: microstrip, stripline, coplanar waveguide, via transitions
- Distributed filters (shunt-stub, ladder, edge-coupled, interdigital), couplers, Wilkinson combiners
- Antennas: folded/tapered dipoles, loops, patch, slot — SMT integration & characterization
- Phased arrays with hybrid analog + digital beamforming
- EM simulation: AWR & ADS (2–2.5D MOM), HFSS (3D FEM), CST (3D FDTD)
Embedded & Firmware
Production firmware for wireless and connected devices in large, real-world codebases.
- Wireless PHY/MAC: 802.11, TDMA/CSMA, rate adaptation, beamforming, DFS, positioning
- Embedded Linux: kernel & userspace drivers, bootloaders (u-boot), filesystems, FOTA (A/B, delta)
- RTOS: FreeRTOS & bare-metal, interrupt/polled drivers, memory management
- Connectivity: Wi-Fi, BLE/NFC/UWB, GNSS/RTK, CAT-M/eDRX cellular, CAN-FD, Ethernet
- Security: AES-256 signing/verification, secure boot across bootloader/kernel/rootfs
- Toolchains: GCC, Yocto, Buildroot, CMake; STM32, Nordic nRF5, NXP KW, Microchip SAMA
Test, Measurement & Compliance
Rigorous, methodical characterization — and the regulatory experience to get products approved.
- S-parameters, cross-correlation phase noise, linearity & compression point, noise figure
- EVM/SNR, synthesizer settling, RF switching speed, radiated & conducted emissions
- Antenna radiation pattern & efficiency; calibration (IQ/LO offset, gain/temp compensation)
- Automated test suites in Python & LabVIEW; RF calibration & link characterization
- FCC / IC / ETSI compliance strategy across full product lines
- NPI, production test development & factory bring-up
