Dual-Antenna Implant Transceiver for Power-Data Interference Control
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Solution Overview
Problem
Existing implantable devices face challenges in achieving high spatio-temporal resolution and data throughput due to power and size constraints, with traditional power sources like batteries being unsuitable for long-term miniaturization, and wireless power transfer systems facing inefficiencies and interference issues.
Innovation Solution
A wirelessly powered data transceiver integrated on a CMOS technology with a dual-antenna architecture for simultaneous power delivery and data communication, utilizing a power management unit to optimize power transfer and modulation schemes for high energy efficiency, and incorporating a dual-antenna system to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If traditional batteries are used for powering implantable devices, then devices can operate independently, but device size increases and long-term miniaturization becomes unsuitable
Solution Approach 1:
The patent combines power delivery and data communication functions into a single integrated transceiver system, eliminating the need for separate battery components. The dual-antenna architecture allows one antenna to receive power wirelessly while the other handles data transmission, merging multiple functions into a compact integrated device that achieves both long operational duration through wireless power transfer and miniaturization by eliminating battery volume.
2Volume of moving object
If wireless power transfer systems are used, then device size is reduced, but power transfer efficiency decreases and interference issues arise
Solution Approach 1:
The patent segments the wireless communication function into two separate antennas: one dedicated to power reception and another to data transmission. This segmentation prevents interference between power and data channels, maintaining high power transfer efficiency while enabling device miniaturization. The separate antennas allow optimized design for each function without compromise.
Solution Approach 2:
The patent introduces a dual-antenna architecture as an intermediary solution between the implantable device and external systems. The first antenna acts as an intermediary for power transfer from external transmitter to implant, while the second antenna serves as an intermediary for bidirectional data communication, thereby maintaining efficient power transfer without direct interference between power and data paths.
3Device complexity
If single-antenna systems are used for both power and data, then device complexity is reduced, but interference between power and data transmission increases
Solution Approach 1:
The patent divides the communication function into two separate antennas: one for power reception and another for data transmission. This segmentation physically separates the power and data paths, eliminating mutual interference while maintaining relatively simple device architecture. Each antenna can be optimized for its specific function without compromising the other.
Solution Approach 2:
The patent assigns different functional qualities to different parts of the system: the first antenna is optimized specifically for power reception with appropriate impedance and geometry, while the second antenna is optimized for data transmission with different characteristics. This local optimization of antenna properties minimizes interference while keeping overall device complexity manageable.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves high data rates of up to 2.5 Mbps in reception and 150 Mbps in transmission, with a compact form factor of 2.4×2.2×0.3 mm³, supporting advanced neural recording and stimulation systems while reducing size and fabrication costs.
Implementation Method 1
wireless power transfer systems
Implementation Method 2
bidirectional data transmission is conducted through a wireless link that utilizes electromagnetic (EM) antennas
Data Source
AI summary
In one embodiment of the invention, a neural unit includes a sensor, and a wirelessly powered transceiver that includes a receive antenna configured to receive a receive signal, a transmit antenna configured to transmit a transmit signal, a rectifier circuit coupled to the receive antenna and configured to convert radio frequency energy from the receive signal into DC (direct current) voltage, a power management unit (PMU) coupled to the rectifier circuit and configured to receive DC voltage from the rectifier circuit, a receiver circuitry block coupled to the receive antenna and configured to provide energy from the receive signal to the PMU, and a transmitter circuitry block coupled to the sensor and the receiver circuitry block and comprising a data modulator circuit, the data modulator circuit configured to generate the transmit signal using DC voltage received from the power management unit.