Unlock instant, AI-driven research and patent intelligence for your innovation.

Energy harvesting circuits and associated methods

A technology of energy harvesting and energy storage circuits, applied in the direction of antenna support/installation device, etc., can solve the problems of increasing the complexity and cost of on-chip antennas

Inactive Publication Date: 2009-11-11
UNIVERSITY OF PITTSBURGH
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach increases the complexity and cost of the antenna on a chip, and the size of the antenna is limited due to the need for a magnetic film layer between the antenna coils

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Energy harvesting circuits and associated methods
  • Energy harvesting circuits and associated methods
  • Energy harvesting circuits and associated methods

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0075] It can be seen that the present invention is suitable for use with very small circuits that can be deployed on an integrated circuit chip. For example, assuming that the harvested energy radio frequency (RF) is 915MHz, the effective area of ​​an antenna is usually not less than k×λ 2 , where k is less than or equal to 1, that is, one wavelength at a given frequency (λ) on one side. For example, if the antenna is a typical half-wave dipole with an effective area smaller than λ 2 Not many. At 915MHz, the wavelength λ is approximately 12.908 inches, resulting in kλ for the half-wave dipole used for energy harvesting 2 At k equal to 0.13 there will be 21.66 square inches. The half-wave characteristic means something about the size of the antenna. However, the physical size of an antenna that may beneficially use the present invention will be substantially less than 21.66 square inches.

[0076] As a second example, a "whip" antenna with an effective area of ​​0.5 a qua...

example 2

[0079] To provide a further comparison, consider a test antenna that is a square with side lengths of 1560 microns within a planar antenna on a CMOS chip serving as the test antenna. This antenna is designed to provide a conductive path for one quarter of the wavelength at 915 MHz. The test antenna used in the experiments had a square helix approximately 3.073 inches in length formed within a square with side lengths of 1560 microns. As a result, the length of the wire is a quarter wavelength, but it does not appear as a conventional quarter wavelength whip antenna. The 1560 micron sides form a physical antenna with a side of 0.061417 inches, thus providing a helical antenna with a physical area of ​​0.00377209 square inches.

[0080] In forming the square helix, a conductive aluminum coil was used with a square resistance of 0.03 ohms. The conductive coils are formed on the die as part of the AMI ABN 1.5μCMOS process. The electrode and inter-electrode dimensions are 13.6 m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides an intrinsically tuned antenna having an inherently tuned antenna for harvesting energy transmitted in space, the intrinsically tuned antenna including portions configured to provide regenerative feedback to the antenna such that the inherently tuned antenna has an area substantially larger than its physical area Effective area. This intrinsically tuned antenna includes intrinsic distributed inductance, intrinsic distributed capacitance and intrinsic distributed resistance, which make the antenna resonate under the excitation of received energy at a specific frequency, and provide feedback to regenerate the antenna. This circuit can be configured on an integrated circuit chip. The invention also provides an associated method.

Description

[0001] See related applications [0002] This application claims the benefit of US Provisional Application No. 60 / 403,784, "ENERGY HARVESTING CIRCUITS AND ASSOCIATED METHODS," filed August 15, 2002. technical field [0003] The present invention relates to an inherently tuned antenna having some circuit portions that provide regenerative feedback to the antenna such that the effective area of ​​the antenna is substantially larger than its physical area. Circuitry used in miniaturized form on an integrated circuit chip or die and associated methods. Background technique [0004] It has long been known that energy such as RF signals can be sent over space to various types of receiving antennas for various purposes. [0005] Rudenberg's "Reception of Electric Waves in Wireless Telegraphy" ("Der EmpfangElektricscher Wellen in der Drahtlosen Telegraphie", Annalen derPhysik IV, 25, 1908, pp.446-466) reveals that through non-ideal energy storage circuits and 1 / 4 wavelength whip T...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/26
Inventor 马林·H·迈克尔克里斯托弗·C·卡佩利哈罗尔德·斯维夫特
Owner UNIVERSITY OF PITTSBURGH