Multi-antenna Array for Implantable Medical Device Telemetry
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Solution Overview
Problem
Current telemetry systems for implantable medical devices (IMDs) are limited by short communication range and low data transfer rates, requiring close proximity between the IMD and external devices for effective communication.
Innovation Solution
The implementation of an implantable medical device with multiple antennas or an antenna array connected to electronic circuitry, enabling far-field radio-frequency telemetry by facilitating transmission and reception of modulated radio-frequency energy at specified carrier frequencies, with individual antenna elements optimized for different frequencies and termination media, and using switched diversity, phased array, or full diversity configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If near-field inductive coupling is used for telemetry, then communication reliability is improved, but communication range is limited to close proximity
Solution Approach 1:
The patent divides the single antenna system into multiple antenna elements (e.g., first and second antennas) with different geometries and frequency responses. Each antenna element is optimized for specific frequency ranges, allowing the system to segment the communication task across multiple specialized components, thereby extending effective communication range while maintaining reliability through frequency-specific optimization.
Solution Approach 2:
Different antenna elements are designed with distinct local qualities - specific geometries and electrical characteristics tailored to particular frequency ranges. The first antenna may be optimized for lower frequencies while the second antenna targets higher frequencies, allowing each element to perform its local function optimally within its designated frequency band, thus extending overall system range.
2Device complexity
If single antenna is used in IMD, then device complexity is reduced, but adaptability to different frequencies and media is limited
Solution Approach 1:
The antenna system is segmented into multiple antenna elements, each with specific geometric configurations optimized for different frequency ranges. This segmentation allows the IMD to adapt to various frequencies and termination media without requiring a completely different antenna design for each application, thereby improving versatility while keeping each individual antenna element relatively simple.
Solution Approach 2:
The multi-antenna system provides universal adaptability by incorporating antenna elements that can handle different frequency ranges and termination media conditions. The system can universally communicate across diverse electromagnetic environments by selecting the appropriate antenna element based on the operational requirements, making the IMD adaptable to various implantation scenarios and communication needs.
3Use of energy by moving object
If close proximity communication is used, then power consumption is reduced, but data transfer rate is limited
Solution Approach 1:
The system dynamically selects which antenna element to use based on the communication requirements, distance, and environmental conditions. This dynamic adaptation allows the system to optimize between power consumption and data transfer rate by switching between antenna elements with different characteristics, enabling higher data rates when needed while maintaining energy efficiency during normal operation.
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
This solution enhances communication range and reliability, provides uniform radiation performance, and maintains consistent operation across a broad frequency range, enabling higher data transfer rates and improved communication efficiency.
Implementation Method 1
The antennas and circuitry are adapted to facilitate transmission and reception of modulated radio-frequency energy at one or more specified carrier frequencies
Data Source
AI summary
A system for enabling telemetry in implantable medical devices is provided. An implantable medical device has device having radio-frequency telemetry capabilities. The device includes a housing and electronic circuitry contained within the housing. The device also includes an array of antennas connected to the electronic circuitry. According to various embodiments, the array and circuitry are adapted to facilitate far-field transmission and reception of modulated radio-frequency energy at one or more specified carrier frequencies. Individual antenna elements in the array are connected simultaneously or in a mutually exclusive manner to electronic circuitry, according to various embodiments. Individual antenna element geometries are sized to optimize individual antennas each for a different range of operating frequencies, according to various embodiments. Other aspects and embodiments are provided herein.