working towards

faster biosignal recordings

faster biosignal recordings

faster biosignal recordings

context

phd research project

tools

circuit design, embedded firmware, in vivo experimentation

timeline

2025 (4 months)

a new communication protocol for battery-free bio-implants to rethink a common tradeoff between efficient power transfer and high data rate for miniaturized implantable devices.

why build this

battery-free implants unlock long-term care

miniature implants without batteries can reduce surgical risk, last longer in the body, and open new therapeutic possibilities. and magnetoelectrics, a wireless power transfer (wpt) modality has proven to be highly effective at delivering power deep in tissue using low-frequency magnetic fields.

but power transfer efficiency limits communication

most wireless implant systems, including magnetoelectrics, rely on resonance to deliver power efficiently. this same tuning, a high-Q factor system, inherently restricts the bandwidth, or speed of data transfer, constraining high data-rate transmission.

the concept
the concept
the concept

separate power from communication

we leverage the idea that magnetoelectric antennas naturally support multiple resonant modes and separate our wireless power delivery and data communication into two different frequencies

designed for different use cases

support two communication approaches (1) passive mode for near-zero-power continuous streaming, useful for subcutaneous biosensors and (2) active mode for higher data rate and longer communication distance, useful deeper cardiac or neural systems

separate power from communication

we leverage the idea that magnetoelectric antennas naturally support multiple resonant modes and separate our wireless power delivery and data communication into two different frequencies

designed for different use cases

support two communication approaches (1) passive mode for near-zero-power continuous streaming, useful for subcutaneous biosensors and (2) active mode for higher data rate and longer communication distance, useful deeper cardiac or neural systems

separate power from communication

we leverage the idea that magnetoelectric antennas naturally support multiple resonant modes and separate our wireless power delivery and data communication into two different frequencies

designed for different use cases

support two communication approaches (1) passive mode for near-zero-power continuous streaming, useful for subcutaneous biosensors and (2) active mode for higher data rate and longer communication distance, useful deeper cardiac or neural systems

the result

efficient power and meaningful data

we enable reliable wireless power delivery while supporting data rates high enough for real biosignal streaming

> read the full publication here

previous proj

‹ translating neural technology

next proj

longer lasting pacemakers ›

+ say hey! let's talk projects and collaborations :)

ellie.c.chen@gmail.com

*ecc