Time-Multiplexed Beam-Steering Antenna Arrays for Extended-Coverage RF Powering of Multiple CMOS Brain Implants

IF 3.4 0 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE microwave and wireless technology letters Pub Date : 2025-04-28 DOI:10.1109/LMWT.2025.3559017

Mohammad Abdolrazzaghi;Roman Genov;George V. Eleftheriades

{"title":"Time-Multiplexed Beam-Steering Antenna Arrays for Extended-Coverage RF Powering of Multiple CMOS Brain Implants","authors":"Mohammad Abdolrazzaghi;Roman Genov;George V. Eleftheriades","doi":"10.1109/LMWT.2025.3559017","DOIUrl":null,"url":null,"abstract":"This letter introduces a wireless powering system for multiple implantable devices located across a wide region of the human brain, addressing the spatial coverage challenges in traditional powering methods. We present an RF phased-array time-multiplexing technique that extends the powering coverage to as far as one hemisphere. The transmitter (TX) array is designed with optimal surface currents at 915 MHz to reach and beam-steer deep brain tissue. With transmitting 1 W, this method ensures safe and consistent power delivery over 18-cm lateral span and provides at least <inline-formula> <tex-math>$250~\\mu $ </tex-math></inline-formula>W to 6-cm deep receiver (RX) implants. In addition, we developed a dynamically biased 65-nm CMOS rectifier, featuring peak power conversion efficiency (PCE) of 72.6% at −2 dBm input power. The integration of phased-array multiplexing and an efficient CMOS rectifier offers a pathway toward arrays of smaller, battery-free neurostimulation implants, capable of simultaneous operation under stringent safety requirements and limited wearable power source size.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 6","pages":"908-911"},"PeriodicalIF":3.4000,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE microwave and wireless technology letters","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/10978862/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"0","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}

引用次数: 0

Abstract

This letter introduces a wireless powering system for multiple implantable devices located across a wide region of the human brain, addressing the spatial coverage challenges in traditional powering methods. We present an RF phased-array time-multiplexing technique that extends the powering coverage to as far as one hemisphere. The transmitter (TX) array is designed with optimal surface currents at 915 MHz to reach and beam-steer deep brain tissue. With transmitting 1 W, this method ensures safe and consistent power delivery over 18-cm lateral span and provides at least

$250~\mu $

W to 6-cm deep receiver (RX) implants. In addition, we developed a dynamically biased 65-nm CMOS rectifier, featuring peak power conversion efficiency (PCE) of 72.6% at −2 dBm input power. The integration of phased-array multiplexing and an efficient CMOS rectifier offers a pathway toward arrays of smaller, battery-free neurostimulation implants, capable of simultaneous operation under stringent safety requirements and limited wearable power source size.

查看原文本刊更多论文

多CMOS脑植入物扩展覆盖射频供电的时复用波束导向天线阵列

这封信介绍了一种无线供电系统，用于位于人类大脑广泛区域的多个可植入设备，解决了传统供电方法中的空间覆盖挑战。我们提出了一种射频相控阵时间复用技术，将功率覆盖范围扩展到一个半球。发射器（TX）阵列被设计为具有915 MHz的最佳表面电流，以到达和波束引导深部脑组织。该方法的传输功率为1w，可确保在18厘米的横向跨度内安全、一致地传输功率，并为6厘米深的接收器（RX）植入物提供至少250~\mu $ W的功率。此外，我们开发了一个动态偏置的65纳米CMOS整流器，在−2 dBm输入功率下，其峰值功率转换效率（PCE）为72.6%。相控阵多路复用和高效CMOS整流器的集成为更小、无电池的神经刺激植入物阵列提供了一条途径，能够在严格的安全要求和有限的可穿戴电源尺寸下同时运行。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

IEEE microwave and wireless technology letters

CiteScore

6.00

自引率

0.00%

发文量