Application Cases

Experiment Name: Application of Power Amplifier in the Wireless Power Supply System of Implantable Flexible Photonic Devices

Research Direction: Wireless Power Supply

Experiment Content: This project develops a flexible wireless implantable biophotonic device by integrating a hemoglobin saturation sensing probe, a low-power Bluetooth microcontroller unit, and a wireless power module on a flexible printed circuit board. The device monitors the blood oxygen levels in the tumor microenvironment to determine the occurrence and development of tumors and assess the effectiveness of chemotherapy drugs. This experiment primarily ensures the stable operation of the device after implantation through wireless magnetic coupling resonance for power supply.

Testing Equipment: Signal generator, ATA-8202 RF power amplifier, vector network analyzer, multimeter, oscilloscope, etc.

Figure 1: Schematic Diagram of the Experiment

Figure 2: Diagram of the Experimental Setup

Experiment Process: The wireless power receiving end of the device is an LCR resonant circuit, which can magnetically couple with an external RF transmitter (13.56 MHz) to power the device. The LCR resonant circuit is simulated using ANSYS HFSS, and the receiving and transmitting end circuits are manufactured accordingly. The external wireless power supply is constructed as follows: A 13.56 MHz AC signal is generated by the signal generator and then amplified by the ATA-8202 RF power amplifier to meet the required transmission power for wireless power supply. The device's receiving end receives RF energy through magnetic coupling and obtains stable electrical energy through rectification, filtering, and voltage regulation circuits.

Experimental Results: The wireless power supply system provides stable electrical energy for the device, enabling it to operate stably when implanted subcutaneously in mice. Figure 3: (a) shows the energy transfer efficiency along the vertical axis of the simulated transmission cage center; (b) shows the corresponding actual test values. Figure 4: shows the power distribution of the device received at the center plane and at a plane 4 cm away from the center of the wireless transmission cage, along with a photo of the device operating normally inside the mouse.

Figure 3: Energy Transfer Efficiency Along the Vertical Axis of the Simulated Transmission Cage Center

Figure 4: Power Distribution of the Device Received at the Center Plane and at a Plane 4 cm Away from the Center of the Wireless Transmission Cage

RF Power Amplifier Recommendation: ATA-8000 Series

Figure: Specification Parameters of the ATA-8000 Series RF Power Amplifier