Electronics Engineer — RF And Analog Design

About EMTensor

EMTensor develops electromagnetic tomography (microwave) brain scanning systems — a new imaging modality for the diagnosis of stroke and traumatic brain injury, and for 24/7 monitoring of tissue viability and treatment response. Our scanner is built around a multi-channel, phase-coherent RF array: dozens of antenna elements, each with its own front end, all locked to a common LO and calibrated to a fraction of a degree of phase. The quality of the image depends directly on the quality of that hardware.

The company is headquartered in Vienna, Austria, with an engineering office in Bengaluru, India. We are a multidisciplinary international team of scientists, engineers and clinicians, backed by our founders and by venture capital, with 30 years of research behind the technology, more than 60 publications and 30+ issued and pending patents.

The Role

You will own RF and analog hardware at the board level — from concept and simulation through schematic, layout supervision, bring-up and measurement, to a documented design that goes into a medical product.

This is a hands-on position: you select the parts, you brief the PCB designer, you sit at the bench with a VNA and a spectrum analyzer, and you are responsible for the numbers the board actually delivers.

The central technical challenge is phase-coherent multi-channel reception: driving integrated transceivers from an external LO, synchronizing several chips, and holding channel-to-channel phase stable across the array.

Key Responsibilities

Design RF and analog receive/transmit boards in the 0.5–3 GHz range: LNAs, mixers, filters, T/R switching, impedance matching, noise and gain budgets.
Design the electronics that sit at the antenna element — front-end amplification, shielding, channel-to-channel isolation.
Select and design in high-resolution ADCs and DACs (16–24 bit), and justify the choice against SNR, SFDR, ENOB and the system noise budget.
Design clocking and LO distribution: fractional-N synthesizers, PLLs, VCOs, reference distribution, phase-noise and jitter budgets.
Run integrated RF transceivers (AD9361 / AD9363 / AD9371 / ADRV9009 class or equivalent) from an external LO and phase-synchronize multiple chips.
Simulate before you build — RF and circuit simulation in Keysight ADS or AWR Microwave Office, EM simulation of antennas and structures in HFSS or CST.
Capture schematics in Altium Designer (or Allegro / Mentor / OrCAD / KiCad), brief and supervise the PCB designer, and take responsibility for the resulting layout: stack-up, controlled impedance, BGA fanout, DFM.
Handle high-speed digital alongside the RF: signal-integrity analysis for DDR3/4, LVDS, JESD204B/C, Gigabit Ethernet and SERDES.
Port reference designs and SoMs onto custom boards — including Zynq-7000 class SoCs, with DDR3, power architecture and sequencing, and boot.
Bring boards up in the lab: VNA, spectrum analyzer, oscilloscope, signal generator, channel-to-channel phase measurement, calibration and debug.
Prepare boards for EMI/EMC compliance testing and fix what the test house finds.
Produce the documentation, BOM and design files that let the board be manufactured and maintained.
Work with contract manufacturers and PCB vendors, and with our RF, FPGA, DSP and software teams in Bengaluru and Vienna.

Required Qualifications

Engineering degree in electronics, RF/microwave or a related field, and 7+ years designing RF and analog boards.
Demonstrable RF front-end design in the 0.5–3 GHz range: LNA, mixer, filter, T/R switch, matching networks, S-parameters, noise figure and gain budgets.
Personal experience selecting and designing in 16–24-bit ADCs/DACs, with the reasoning behind the choice.
Synthesizer, PLL and phase-noise design — fractional-N, VCO, reference and clock distribution, phase stability between channels.
External LO on an integrated transceiver — running an AD9361 / AD9363 / AD9371 / ADRV9009 class device (or equivalent) from an external LO and phase-synchronizing several of them. This is the key requirement for the role.
Porting a reference design or SoM to a custom board — a board you took from someone else’s design to your own, not edits to an existing project.
Zynq-7000 or a comparable SoC at board level: DDR3, power and sequencing, BGA fanout, boot.
RF and EM simulation: Keysight ADS or AWR Microwave Office, plus HFSS or CST.
Schematic capture in Altium Designer, or Cadence Allegro / Mentor / OrCAD / KiCad.
Ownership of PCB layout: you have briefed a PCB designer, reviewed and accepted the result, and worked with controlled impedance and defined stack-ups.
Signal integrity and high-speed interfaces: SI analysis, DDR3/4, LVDS, JESD204B/C, Gigabit Ethernet, SERDES.
Hands-on measurement: VNA, spectrum analyzer, oscilloscope, signal generator, channel-to-channel phase.
EMI/EMC: preparing a board for compliance testing and fixing it afterwards.
At least one board you took all the way through to a working product — power-up, debug, measurement, documentation and BOM — not schematics alone.
Technical English sufficient for written correspondence with contractors and PCB vendors.

Preferred Qualifications

MSc in RF/microwave or analog design.
Medical hardware experience, IEC 60601 and associated EMC testing.
Multi-channel systems: MRI coils, phased arrays, radar, digital beamforming.
SDR ecosystem experience: GNU Radio, Vivado, MATLAB/Simulink.
Python or MATLAB for measurement processing and RF calibration.
Experience taking a product from prototype into series production.

What We Are Not Looking For

To save everyone’s time: this is not a digital design role, and it is not a simulation-only role. If RF and analog appear in your CV mainly in passing, if layout and lab debug were always someone else’s job, or if you cannot name a component you selected yourself and explain why, this position will not be a good fit.

How to Apply

Send your CV to lizaveta.shatalava@emtensor.com. Please put the role title — Electronics Engineer — RF and Analog Design — in the subject line.
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