Ultra-Low-Power Wireless Transmitter with Passive Bragg Oscillator

具有无源布拉格振荡器的超低功耗无线发射器

• 批准号: 0725688
• 负责人: Edwin Kan
• 金额: $ 27万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-15 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0725688&HistoricalAwards=false
• 关键词: Ultra; Low; Power; Wireless; Transmitter

ECCS-0725688Edwin Kan, Cornell UniversityIntellectual Merit:The proposed effort seeks to make a fundamental breakthrough in realizing the ultra-low-power wireless transmitter for low-bit-rate communication in millimeter-size systems. In conventional radio link, the small antenna size constrained by the overall system geometry will require high carrier frequency, but a lower limit of the power consumption will be set by the parasitic capacitance of the radio circuits. There are several previous efforts to resolve this basic conflict, including an extended dormant mode, ultra-wide-band pulse systems, and the carrier-based impulse radio. However, either the physical antenna is difficult to realize, or the power can not be sufficiently reduced. The proposed transmitter requires only a narrow-band antenna, but generates the carrier oscillation from a passive Bragg lattice. The digital base band is operated at a low frequency close to the specified bit rate of communication, and can be readily implemented in the digital wrist watch fashion. The signal rise and fall time can be first sharpened by a buffer, and then be further sharpened with enlarged magnitude in nonlinear transmission lines. When the wave front contains a large signal with characteristic frequency exceeding the Bragg lattice frequency, single-tone oscillating waves are generated with high power conversion efficiency to drive the millimeter-size antenna. Broader Impact:Inexpensive millimeter-size autonomous systems have many important applications such as environmental monitoring, body implants for disease screening and detection with minimal intrusion, the creation of intelligent spaces, and structural health monitoring. The key missing technology is the low-power wireless link. The success of this research effort will bring forth major impacts on senor network and biomedical implants. The miniature autonomous system design will also serve as the main example for outreach to high-school female and minority students to boost their aptitude towards engineering as a socially relevant career direction.

edwin Kan， Cornell university智力优势：提出的努力寻求在实现毫米级系统的低比特率通信的超低功耗无线发射机方面取得根本性突破。在传统的无线电链路中，受整个系统几何形状限制的小天线尺寸将需要高载波频率，但功耗的下限将由无线电电路的寄生电容设定。为了解决这一基本冲突，之前有过一些努力，包括扩展休眠模式、超宽带脉冲系统和基于载波的脉冲无线电。然而，要么是物理天线难以实现，要么是功率不能充分降低。所提出的发射机只需要窄带天线，但从无源布拉格晶格产生载波振荡。数字基带以接近指定通信比特率的低频操作，并且可以容易地以数字腕表方式实现。在非线性传输线中，信号的上升和下降时间可以先通过缓冲器进行锐化，然后以放大幅度进一步锐化。当波前含有特征频率超过布拉格晶格频率的大信号时，产生单音振荡波，具有较高的功率转换效率，驱动毫米级天线。更广泛的影响：廉价的毫米级自主系统有许多重要的应用，如环境监测、用于疾病筛查和检测的身体植入物、最小侵入、智能空间的创建和结构健康监测。缺少的关键技术是低功耗无线链路。这项研究的成功将对传感器网络和生物医学植入物产生重大影响。微型自主系统的设计也将成为向高中女生和少数民族学生提供服务的主要范例，以提高工科学生作为与社会相关的职业方向的能力。