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Radio Frequency Power Amplifier Design Engineer Job Opening In Singapore, Singapore – Now Hiring DOODLE LABS (SG) PTE. LTD.


Job description

Radio Frequency Power Amplifier Design Engineer
About Doodle Labs
Doodle Labs is the global leader in high-performance private wireless systems.

We build cutting-edge mesh networks for robotics, drones, and the Industrial Internet of Things.

Doodle Labs has experienced rapid growth over the past five years as our radio systems have been adopted by Fortune 500 companies (e.g. Airbus, General Electric) and industry-leading innovators (e.g. Boston Dynamics, FLIR).


Your Opportunity
Doodle Labs develops market-leading broadband mesh radios.

Products include handheld mesh hotspots (Wearable Smart Radio) and tiny embedded multi-band radios for robots (Helix).

Your opportunity is to build novel RF products while implementing Doodle Labs’ patented RF techniques.

You will design, simulate, validate, and optimize power amplifier circuits operating between 0.2 and 7 GHz, with output power up to 50W.

This role will be hands-on with testing, debugging, load-pull analysis, and documentation, and will require deep collaboration with system and hardware teams to deliver high-performance modules for advanced wireless systems.


Job Description
1.

Design and Develop PA Circuits
Lead PA module development including topology selection, schematic capture, and PCB layout.


Design for efficiency, gain, and linearity across a broad frequency spectrum.


Apply advanced impedance matching, stability analysis, and EM simulation techniques.


2.

Simulation and Validation
Use simulation tools such as ADS, AWR, and optionally HFSS or CST for circuit and electromagnetic analysis.


Perform load-pull measurements, S-parameter analysis, and linearity testing.


Validate designs in the lab using VNAs, spectrum analyzers, signal generators, and power meters.


3.

Collaborate Across Teams
Work closely with PCB layout engineers to ensure best practices in high-frequency design.


Coordinate with system architects and digital/RF engineers to meet product specifications.


Support product engineering with documentation, design reviews, and lessons learned.


4.

Deliver Key Milestones
First 30 Days:
Familiarize with existing PA architectures, tools, and lab setup.

Begin schematic-level design of new PA circuit.


First 60 Days:
Complete first-pass design, initiate simulations, and guide initial PCB layout.


First 90 Days:
Validate the prototype in lab conditions; perform debugging, tuning, and generate a detailed test and evaluation report.


Job Requirements
Degree in Electrical Engineering, RF Engineering, or a related field.


5+ years in RF PA circuit design and validation.


Hands-on experience with RF power amplifier development, including load-pull, impedance matching, and performance tuning.


Proficient in RF simulation tools (ADS, AWR) and experienced with EM solvers (HFSS or CST a plus).


Skilled in testing with lab instruments such as VNAs, spectrum analyzers, and RF signal generators.


Proven ability to work with layout, digital, and product engineering teams.


Committed to robust documentation and iterative improvement.


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Required Skill Profession

Other General


  • Job Details

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