Abstract: An optimal configuration for at least one antenna and/or at least one frequency selective surface is generated. A configuration of elements is generated by selecting a simple configuration of at least one element and applying a genetic algorithm to the simple configuration to generate a configuration optimized for various characteristics. A stochastic process may be used to randomly select an arrangement of elements as the simple antenna configuration and to select elements that connect the randomly selected elements to produce a stochastic configuration to which the genetic algorithm is then applied. Alternatively, an iterated or semi-iterated process may be applied to the simple antenna configuration to produce a fractal or a semi-fractal configuration, respectively, to which the genetic algorithm is then applied. Also, the elements may be optimized independently.
Type:
Grant
Filed:
February 8, 2002
Date of Patent:
April 29, 2008
Assignee:
Sciperio, Inc.
Inventors:
Douglas H. Werner, Pingjuan L. Werner, Kenneth H. Church, Michael John Wilhelm
Abstract: Methods and systems are provided for embedding electrical components within a device including a frequency responsive structure, such as an antenna or a frequency selective surface. Electrical components are selected and locations for placing the selected components within the device are selected for optimizing performance characteristics of the structure. The selection may be performed by modeling the device with various electrical components embedded at various locations using, for example, a genetic algorithm. The selected components are embedded at the selected locations. The frequency responsive structure and the selected components embedded at the selected locations may be produced in the same manufacturing process. The selected electrical components may be embedded at the selected locations as contiguous and integral parts of the device and may be embedded within the frequency responsive structure.
Type:
Application
Filed:
July 2, 2002
Publication date:
April 24, 2003
Inventors:
Kenneth H. Church, Robert M. Taylor, Michael John Wilhelm, Douglas H. Werner, Pingjuan L. Werner
Abstract: By configuring a high impedance frequency selective surface (HZ-FSS) structure for the appropriate values of surface impedance (surface resistance and surface reactance), a high frequency artificial ferrite metamaterial can be synthesized with almost any desired value of real and imaginary permeability. Materials with these properties have not previously been physically realizable at frequencies above 1 GHz.
Abstract: By configuring a high impedance frequency selective surface (HZ-FSS) structure for the appropriate values of surface impedance (surface resistance and surface reactance), a high frequency artificial ferrite metamaterial can be synthesized with almost any desired value of real and imaginary permeability. Materials with these properties have not previously been physically realizable at frequencies above 1 GHz.
Abstract: An antenna system includes an antenna element and an electromagnetic bandgap element proximate the antenna element wherein the electromagnetic bandgap element is optimized for narrow bandwidth operation thereby providing radiofrequency selectivity to the antenna system. Preferably the electromagnetic bandgap element is tunable such as through use of a bias-alterable dielectric substrate or other tuning mechanism. The design approach also provides a means of creating an ultra-thin low-profile narrowband tunable channel selective antenna system suitable for low frequency applications.
Type:
Grant
Filed:
July 30, 2004
Date of Patent:
May 9, 2006
Assignee:
The Penn State Reserach Foundation
Inventors:
Douglas H. Werner, Pingjuan L. Werner, Michael J. Wilhelm
Abstract: A system for low power chemical sensing can include a voltage shift unit which receives a voltage signal from a chemical sensor unit. The voltage signal can be determined by a concentration of an analyte. The voltage shift unit can transform the voltage signal to an input voltage signal, and send the input voltage signal to a plurality of frequency selective surface (FSS) units of an FSS array. The FSS array can communicate a radio frequency (RF) signal in an Institute of Electrical and Electronics Engineers (IEEE) S band with a resonant frequency based on the input voltage to provide the concentration of the analyte.
Type:
Grant
Filed:
July 12, 2019
Date of Patent:
September 19, 2023
Assignees:
University of Utah Research Foundation, The Penn State Research Foundation
Inventors:
Benjamin R. Bunes, Leonard Cardillo, Douglas Later, Ling Zang, Douglas H. Werner, Ronald Jenkins, Micah D. Gregory
Abstract: A frequency selective surface includes a pattern of electromagnetic material formed on a substrate suspendable over a ground plane for reflecting or transmitting electromagnetic waves at one or more particular frequencies. The frequency selective surface may include one or more meandering line inductors and/or one or more interdigitated capacitors formed within the pattern of electromagnetic materials for adjusting the frequencies at which the electromagnetic waves are reflected or transmitted. The frequency selective surface may also or instead include one or more inductors and/or one or more capacitors arranged in series within the pattern of electromagnetic materials to adjust the frequencies at which the electromagnetic waves are reflected or transmitted. In addition, the pattern of electromagnetic materials may be formed within the substrate in such a manner that the frequencies at which the electromagnetic waves are reflected or transmitted are tunable.
Type:
Application
Filed:
November 27, 2002
Publication date:
July 31, 2003
Inventors:
Michael John Wilhelm, Douglas H. Werner, Pingjuan L. Werner, Jeffrey S. Daniels, Lance D. Swann, William L. Warren
Abstract: An antenna array comprised of a fractile array having a plurality of antenna elements uniformly distributed along a Peano-Gosper curve. An antenna array comprised of an array having an irregular boundary contour comprising a plane tiled by a plurality of fractiles covering the plane without any gaps or overlaps. A method for generating an antenna array having improved broadband performance wherein a plane is tiled with a plurality of non-uniform shaped unit cells or an antenna array, the non-uniform shaped and tiling of the unit cells are then optimized. A method for rapidly forming a radiation pattern of a fractile array employing a pattern multiplication for fractile arrays wherein a product formulation is derived for the radiation pattern of a fractile array for a desired stage of growth. The pattern multiplication is recursively applied to construct higher order fractile array forming an antenna array.
Type:
Grant
Filed:
July 23, 2003
Date of Patent:
June 6, 2006
Assignee:
Penn State Research Foundation
Inventors:
Douglas H. Werner, Waroth Kuhirun, Pingjuan L. Werner
Abstract: An antenna includes a first body having an array of resonators; a spacer adjacent to the first body, and a second body adjacent to the spacer such that the spacer is between the first and second bodies. The first body can be configured as an artificial metasurface ground plane and the second body can be configured as a monopole.
Abstract: An antenna includes a first body having an array of resonators; a spacer adjacent to the first body, and a second body adjacent to the spacer such that the spacer is between the first and second bodies. The first body can be configured as an artificial metasurface ground plane and the second body can be configured as a monopole.
Abstract: An antenna includes a first body having an array of resonators; a spacer adjacent to the first body, and a second body adjacent to the spacer such that the spacer is between the first and second bodies. The first body can be configured as an artificial metasurface ground plane and the second body can be configured as a monopole.
Abstract: Examples of the present invention include methods and apparatus for modification of electromagnetic waves, including lenses with generally parallel flat surfaces. Lenses may comprise metamaterials, dielectric materials (such as glass), plastics, and the like. Lenses may have an index profile corresponding to a coordinate transformation for the desired effect on the electromagnetic waves.
Abstract: Examples of the present invention include methods and apparatus for modification of electromagnetic waves, including lenses with generally parallel flat surfaces. Lenses may comprise metamaterials, dielectric materials (such as glass), plastics, and the like. Lenses may have an index profile corresponding to a coordinate transformation for the desired effect on the electromagnetic waves.
Abstract: An antenna includes a first body having an array of resonators; a spacer adjacent to the first body, and a second body adjacent to the spacer such that the spacer is between the first and second bodies. The first body can be configured as an artificial metasurface ground plane and the second body can be configured as a monopole.
Abstract: An antenna system is provided that includes an antenna having an elongated conducting segment, such as a metal rod. An anisotropic metamaterial surrounds the elongated conducting segment of the antenna. The presence of the metamaterial remarkably expands the VSWR <2. An example antenna is a monopole antenna, such as a quarter-wavelength monopole antenna, surrounded by the metamaterial.
Type:
Grant
Filed:
October 15, 2013
Date of Patent:
December 5, 2017
Assignee:
The Penn State Research Foundation
Inventors:
Douglas H. Werner, Zhihao Jiang, Micah D. Gregory
Abstract: An antenna system is provided that includes an antenna having an elongated conducting segment, such as a metal rod. An anisotropic metamaterial surrounds the elongated conducting segment of the antenna. The presence of the metamaterial remarkably expands the VSWR<2. An example antenna is a monopole antenna, such as a quarter-wavelength monopole antenna, surrounded by the metamaterial.
Type:
Application
Filed:
October 15, 2013
Publication date:
April 17, 2014
Applicant:
The Penn State Research Foundation
Inventors:
Douglas H. Werner, Zhihao Jiang, Micah D. Gregory
Abstract: Example apparatus have a radiation-receiving surface configured to receive electromagnetic radiation, including a sub-wavelength grating supported by a substrate. The sub-wavelength grating has a side-wall profile that may be configured and optimized to obtain desired spectral properties.
Type:
Application
Filed:
October 8, 2010
Publication date:
April 14, 2011
Applicants:
The Penn State Research Foundation
Inventors:
Douglas H. Werner, Theresa S. Mayer, Clara R. Baleine
Abstract: Examples of the present invention include metamaterials, including metamaterial lenses, having material properties that approximate the behavior of a material with low (0<n<1) effective index of refraction. Metamaterials may be designed and tuned using dispersion engineering to create a relatively wide-band low-index region. A low-index metamaterial lens created highly collimated beams in the far-field from a low-directivity antenna feed.
Type:
Application
Filed:
May 4, 2012
Publication date:
November 8, 2012
Inventors:
Douglas H. Werner, Erik Lier, Bonnie G. Martin, Jeremiah P. Turpin, Qi Wu
Abstract: Examples of the present invention include antennas and scattering elements having a metamaterial cloak configured so as to reduce effects on the operating parameters of a nearby antenna. For example, an antenna has an antenna frequency, and a cloak is disposed around the antenna having a frequency range in which the cloak is operative. The antenna frequency can lie outside the frequency range of the cloak, whereas the frequency of a second antenna lies within the frequency range of the cloak. In this case, the antenna is cloaked relative to the second antenna.