RF Hardware Engineer

Anashield; København; On-site; DKK 600,000 - 900,000; Full time

Job summary

Anashield is seeking an RF hardware engineer to own the RF layer of passive sensing systems, from antennas to ADCs. You will design the RF signal chain and the high-frequency circuits behind it: LNAs, power amplifiers, filters, mixers, and RF PCBs.

Collaborate with SDR, embedded and DSP teams to integrate the front-end and verify end-to-end system performance across lab and field tests, ensuring EMC and thermal integration for reliable operation.

Qualifications

• Hands-on experience designing RF front-ends and receive signal chains.
• Deep knowledge of LNAs, power amplifiers, mixers, filters, couplers, and synthesis trade-offs.
• Practical RF PCB design experience with impedance control, matching, layout, grounding.
• Experience with RF/EM simulation tools (ADS, AWR/MWO, Ansys HFSS, CST or similar).
• Strong laboratory skills with VNAs, spectrum analyzers and signal generators.
• Ability to take a design from concept and simulation through prototype, measurement and field-ready hardware.

Responsibilities

• Own RF signal chain design end to end: link budgets, cascaded noise figure, gain distribution, dynamic range.
• Design and specify RF front-end hardware: LNAs, power amplifiers, filters, mixers, PLL/LO and frequency synthesis.
• Design high-frequency circuits and multilayer RF PCBs: impedance control, stack-up, grounding.
• Select, specify and characterize antennas for direction-finding and wideband sensing.
• Design phase- and amplitude-matched multi-channel RF paths for coherent reception.
• Bring up, debug and characterize hardware in the lab with VNA, spectrum analyzer and signal generators.
• Ensure EMC/EMI performance, thermal and mechanical integration for real-world use.
• Collaborate with SDR, embedded and DSP teams to integrate the front-end and verify performance.
• Support prototyping, design for manufacture, vendor selection and small-series production.

Skills

RF front-ends

LNA/PA design

RF PCB design

RF simulation tools

Laboratory measurement

Concept to prototype

Tools

Altium

KiCad

ADS

AWR/MWO

HFSS

CST

Job description

Role Summary

We are looking for an RF hardware engineer to own the physical RF layer of our passive RF sensing systems - everything from the antenna to the ADC. You will design the RF signal chain and the high-frequency circuits behind it: antennas, LNAs, power amplifiers, filters, mixers, couplers, distribution and calibration networks, and the RF PCBs they live on.

Key Responsibilities

• Own the RF signal chain design end to end: link budgets, cascaded noise figure, gain distribution, dynamic range, IP3/compression, sensitivity and selectivity trade-offs.
• Design and specify RF front-end hardware: LNAs, power amplifiers, filters, mixers, PLL/LO and frequency synthesis, attenuators, switches, couplers, splitters/combiners and limiters.
• Design high-frequency circuits and multilayer RF PCBs: impedance-controlled transmission lines, matching networks, stack-up and material selection, grounding and shielding.
• Select, specify and characterise antennas and antenna arrays (element spacing, radiation patterns, polarisation, mutual coupling, radome effects) for direction-finding and wideband sensing.
• Design phase- and amplitude-matched multi-channel RF paths for coherent reception, including LO/clock distribution and calibration networks.
• Bring up, debug and characterise hardware in the lab: VNA, spectrum analyser, signal generators, noise-figure measurements, oscilloscopes, plus over-the-air and chamber testing.
• Ensure EMC/EMI performance, thermal and mechanical integration, and reliable operation in real-world field conditions.
• Work closely with our SDR, embedded and DSP systems to integrate the front-end and verify end-to-end system performance.
• Support prototyping, design for manufacture, component and vendor selection, and the transition to small-series production.

Required Qualifications

• Proven hands-on experience designing RF front-ends and receive signal chains
• Deep component-level knowledge of LNAs, power amplifiers, mixers, filters, couplers and PLL/synthesisers, and the real-world trade-offs between them.
• Practical RF PCB design experience (impedance control, matching, layout, grounding) with Altium, KiCad or equivalent.
• Experience with RF/EM simulation tools (e.g. ADS, AWR/Microwave Office, Ansys HFSS, CST or similar).
• Strong laboratory skills: confident with VNAs, spectrum analysers and signal generators, and comfortable debugging hardware you did not design.
• Ability to take a design from concept and simulation through prototype, measurement and field-ready hardware.

Nice-to-Haves

• Antenna and antenna-array design, and direction-finding or emitter-localisation hardware.
• Familiarity with SDR platforms and multi-channel coherent reception.
• FPGA or DSP exposure (RFNoC, Vivado, digital filtering, calibration algorithms).
• Programming and scripting for test automation and measurement (Python, MATLAB, C/C++).
• Wideband spectrum monitoring or passive sensing system experience.
• EMC/EMI pre-compliance and regulatory testing background.
• Mechanical and thermal integration of RF assemblies, connectors, cabling and enclosures.