Fractal Systems, Inc. | Date: 2010-07-02
An antenna includes at least one element whose physical shape is at least partially defined as a second or higher iteration deterministic fractal. The resultant fractal antenna does not rely upon an opening angle for performance, and may be fabricated as a dipole, a vertical, or a quad, among other configurations. The number of resonant frequencies for the fractal antenna increases with iteration number N and more such frequencies are present than in a prior art Euclidean antenna. Further, the resonant frequencies can include non-harmonically related frequencies. At the high frequencies associated with wireless and cellular telephone communications, a second or third iteration, preferably Minkowski fractal antenna is implemented on a printed circuit board that is small enough to fit within the telephone housing.
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 149.72K | Year: 2010
Advances are needed in efficient solar photovoltaic systems among many other alternative energy sources to reduce security and reliability risks and to reduce environmental impacts. Current technology yields efficiencies above 10% but lack the low cost factor and the flexibility or conformability needed in many markets. The latter two factors can be addressed by the use of organic photovoltaics but their efficiencies are still around 2% on flexible substrates and around 6% on glass at the cell level, due for the most part to poor charge transport among several other reasons. In this project, Fractal Systems, Inc proposes to address the issues associated with organic photovoltaics by engineering the composition of the active layer and the overall device design to enhance charge transport. Our main objective in this effort is to develop simple, reliable and low cost polymer photovoltaics with efficiencies above 10% based on a proprietary technology (patent pending). Bulk heterojunctions will be built and characterized in light of our goal which targets mainly efficiency and transparency using modified active layer compositions relative to the state of the art. We will use glass substrates in our initial effort to prove feasibility of our approach. However, we will also use flexible substrates in Phase II for use in a wider range of applications. Once we achieve the desired high efficiency, we will work with the appropriate parties for full scale development of a viable fabrication process towards commercialization in Phase III with our target being the solar panel industry for homes and commercial buildings. Commercial Applications and Other Benefits:The development of high-performance, low-cost photovoltaic modules, at a cost much lower than that of current technology, will prove to be useful for powering equipment in the commercial and military sectors in addition to providing electricity for homes and commercial buildings. Other uses include the aerospace market, power for remote locations, large area photodetectors, and flexible photovoltaics will be able to power electronics embedded in military clothing and gear.
Fractal Systems, Inc. | Date: 2015-01-16
Arrangement of resonators in an aperiodic configurations are described, which can be used for electromagnetic cloaking of objects. The overall assembly of resonators, as structures, do not all repeat periodically and at least some of the resonators are spaced such that their phase centers are separated by more than a wavelength. The arrangements can include resonators of several different sizes and/or geometries arranged so that each size or geometry corresponds to a moderate or high Q response that resonates within a specific frequency range, and that arrangement within that specific grouping of akin elements is periodic in the overall structure. The relative spacing and arrangement of groupings can be defined by self similarity and origin symmetry.
Fractal Systems, Inc. | Date: 2015-05-18
Aspect of the present disclosure are directed to methods and apparatus producing enhanced radiation characteristics, e.g., wideband behavior, in or for antennas and related components by providing concentric sleeves, with air or dielectric material as a spacer, where the sleeves include one or more conductive layers, at least a portion of which includes fractal resonators closely spaced, in terms of wavelength. A further aspect of the present disclosure is directed to surfaces that include dual-use or multiple-use apertures. Such aperture engine surfaces can include a top (or first) layer of antenna arrays, a middle (or second) layer of a metal-fractal backplane player, and a third (or bottom) layer for solar cell or solar oriented power collection.
Fractal Systems, Inc. | Date: 2010-11-09
A portable antenna system includes an antenna that is substantially defined by one or more portions that include electrically conductive self-similar extensions. The system also includes an article of clothing in which the antenna is attached to a surface of the article of clothing such that electrically conductive self-similar extensions extend across the surface of the article of clothing.