Patent ID: 11871896
Assignee: UNIVERSITE DE RENNES 1
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. Biotelemetry device for use in a biological medium, wherein the biotelemetry device comprises:
a microcontroller configured to generate an electrical setpoint signal;
a radio antenna configured to transmit an electromagnetic wave to an external device by converting an incident electrical signal;
a radio frequency circuit, interconnected between the microcontroller and the radio antenna,
the radio antenna being configured to, when the biotelemetry device is placed in the biological medium, be impedance mismatched with respect to the radio frequency circuit so as to generate a reflected electrical signal by reflection of a fraction of the incident electrical signal, wherein the generation of the reflected electrical signal occurs at the same time the radio antenna emits the electromagnetic wave to the external device;
in which the radio frequency circuit is configured to, in a first operating mode, pick up a first fraction of the electrical setpoint signal, transmit to the radio antenna a second fraction of the electrical setpoint signal and pick up the reflected electrical signal, wherein the second fraction of the electrical setpoint signal forms the incident electrical signal;
in which the microcontroller is configured to determine a reflection coefficient based on the first fraction of the electrical setpoint signal and the reflected electrical signal.