Merlin F.
Antenna & RF Design Engineer | HFSS · CST · ADS | PCB Design (Altium) | Creo 3D & AutoCAD Drawings
Los Angeles,
United States
Global rank:
8,631
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157,056
Skill pts: 10
2D AutoCAD 2025
Altium Designer 2025
ANSYS HFSS 2025
Antenna Engineering
CST Microwave Studio 2025
About
Antenna, RF and product-design engineer with over a decade of industry experience and multiple mass-produced designs in automotive, smart-home, unified-communications and hearing-aid products.
What I offer on Cad Crowd:
• Antenna design & simulation (HFSS / CST) — PCB, FPC, stamped-metal and wire antennas; matching, tuning, efficiency and pattern optimization; multi-band and MIMO isolation work
• RF engineering (ADS) — link budgets, S-parameter simulation, filter and LNA circuits (including a GPS LNA built around a domestic chipset)
• PCB design (Altium Designer / OrCAD) — schematics, RF layout, design review and debugging support
• Mechanical design — 3D modeling in Creo and fully dimensioned 2D production drawings in AutoCAD, including fixtures and housings
I have taken products from first simulation to mass production: automotive shark-fin antennas (GPS+LTE, five-in-one), smart-home antennas, WiFi/DECT/Bluetooth/NFC front ends, and a patented non-standard wireless-charging module for hearing aids. Patents granted on antennas, wireless charging and product structures.
Deliverables are files your factory can build from: simulation reports, schematic/PCB packages, STEP files and dimensioned drawings. NDA-friendly; happy to start with a small scoped task.
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What I offer on Cad Crowd:
• Antenna design & simulation (HFSS / CST) — PCB, FPC, stamped-metal and wire antennas; matching, tuning, efficiency and pattern optimization; multi-band and MIMO isolation work
• RF engineering (ADS) — link budgets, S-parameter simulation, filter and LNA circuits (including a GPS LNA built around a domestic chipset)
• PCB design (Altium Designer / OrCAD) — schematics, RF layout, design review and debugging support
• Mechanical design — 3D modeling in Creo and fully dimensioned 2D production drawings in AutoCAD, including fixtures and housings
I have taken products from first simulation to mass production: automotive shark-fin antennas (GPS+LTE, five-in-one), smart-home antennas, WiFi/DECT/Bluetooth/NFC front ends, and a patented non-standard wireless-charging module for hearing aids. Patents granted on antennas, wireless charging and product structures.
Deliverables are files your factory can build from: simulation reports, schematic/PCB packages, STEP files and dimensioned drawings. NDA-friendly; happy to start with a small scoped task.
Portfolio
Experience
- RF Engineer a listed unified-communications company · Contract Apr 2014 – Present 12 yrs 7 mos China, Fujian, 厦门 RF and antenna design for unified-communications products (desk phones, headsets, video-conferencing systems, tablets, hearing aids). Impedance matching and debugging of RF links across WiFi, DECT, Bluetooth and NFC; fixed USB 3.0 interference with 2.4 GHz WiFi/Bluetooth and SDIO interference with WiFi TIS. Led a non-standard wireless-charging module for hearing aids (patented) and built a DECT OTA test setup in an anechoic chamber.
- R&D Manager Xiamen Meilisheng Technology Co., Ltd. · Full-time Jul 2014 – Mar 2026 11 yrs 8 mos China, Fujian, 厦门 Led the R&D department (two mechanical engineers, one electronics engineer) at a hearing-aid manufacturer. Designed and mass-produced several hearing-aid lines and their charging cases, including Qi-compatible wireless charging; owned ISO 13485 quality-system documentation through third-party certification. Two granted structural patents on charging-case designs.
- Senior Antenna Engineer Leedarson IoT Technology Inc. · Contract Apr 2014 – Jan 2022 7 yrs 9 mos China, Fujian, 厦门 Antenna design and tuning for smart-home products (smart speakers, trackers, dimmers, smart lights, water sensors) using PCB, stamped-metal, FPC and wire antennas. Simulation and measurement of efficiency, patterns and gain; TRP/TIS and TDR testing. Contributed to four patent filings, one as independent author; researched LDS antenna processes.
- R&D Engineer untai Electronics Technology (Xiamen) Co., Ltd. · Full-time Dec 2014 – Jul 2019 4 yrs 7 mos China, Fujian, 厦门 Designed automotive antennas that went into mass production: CAT1, DVB-T, GPS, LTE, AM/FM and WiFi, including multi-band shark-fin antennas (GPS+LTE combo, five-in-one) with inter-antenna isolation work. Designed a DVB-T dipole with matching LNA circuit and a GPS LNA around a domestic chipset; also tracker and inertial-navigation hardware, production fixtures and structural drawings.
Education
- Fujian Normal University Bachelor's Degree, Electronic Information Science and Technology, 4 2009 – 2013
Other experience
- granted patent Granted patents in China covering antenna designs, a non-standard wireless-charging module for hearing aids, and charging-case structures; contributed to four additional patent filings at a smart-home IoT company.
Stats
0 followers, 0 following
Joined: November 15, 2026
Last seen: November 15, 2026
Area of Expertise
Languages
Chinese (Simplified) Native or bilingual proficiency
English Limited working proficiency
Location
Los Angeles, CA, United States