Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8164535 | Coplanar waveguide FED planar log-periodic antenna A CPW fed planar log-periodic antenna is provided. The antenna includes: an upper substrate; a planar log-periodic antenna structure formed beneath the upper substrate; a CPW-fed structure formed on the upper substrate for feeding energy into the planar log-periodic... | 04/24/2012 |
| 8130162 | Broadband multi-dipole antenna with frequency-independent radiation characteristics The invention describes a broadband multi-dipole antenna that has low input reflection coefficient, low cross polarization, rotationally symmetric beam and constant beam width and phase center location over several octaves bandwidth. The dipoles are fed from one or ... | 03/06/2012 |
| 8068065 | Concentric ring log-periodic slot direction finding antenna A concentric ring, log-periodic slot antenna used for direction finding is disclosed. There are a number of continuous, circular slots nested inside of each other. A cover over the slots cavities has excitation plates and conductors thereon. There are four excitatio... | 11/29/2011 |
| 7907098 | Log periodic antenna A log periodic antenna comprises a plurality of radiating elements in an end fire configuration, each radiating element in the plurality of radiating elements comprises a conductor, and at least two shunt inductances connected to the conductor; a substrate connectin... | 03/15/2011 |
| 7659862 | Antenna system for radio frequency identification An antenna including an electrically conductive portion defined substantially by a self-similar geometry present at multiple resolutions. The electrically conductive portion includes two or more angular bends and is configured to radiate broadband electromagnetic en... | 02/09/2010 |
| 7646352 | Ultra-wideband log-periodic dipole array with linear phase characteristics A log-periodic dipole array system employs a structure for the transmitter and the receiver designed in a way such that they compensate for the non-linear characteristics of each other to realize linear phase characteristics as a pair. Radiation elements on the rece... | 01/12/2010 |
| 7609220 | Channelized log-periodic antenna with matched coupling A log-periodic antenna coupled to a channelizer is described in which matched scale constants for the antenna and the channelizer are used to achieve substantially identical coupling over each fractional bandwidth channel. Embodiments for simultaneous dual polarizat... | 10/27/2009 |
| 7583233 | RF Receiving and transmitting apparatuses having a microstrip-slot log-periodic antenna A log-periodic antenna having a layer of dielectric media interposed between a microstrip log-periodic portion and a slot log-periodic portion where an array of two or more log-periodic antennas that may be placed about vehicles, such as air vehicles, or mounted on ... | 09/01/2009 |
| 7545338 | Log-periodic dipole array (LPDA) antenna and method of making A log periodic dipole array (LPDA) antenna including a first antenna element, a second antenna element and a pair of transmission line structures is provided herein. The first antenna element is fabricated as a continuous piece of conductive material to include a pl... | 06/09/2009 |
| 7432872 | Compact aviation vertically polarized log periodic antenna A reduced height log periodic antenna that may safely be positioned under the rotating blades of a helicopter sitting on the ground and still resonate in the frequency range at which the antenna was originally designed to resonate. The antenna comprises a pair of an... | 10/07/2008 |
| 7429960 | Log-periodic antenna The subject invention provides a log-periodic antenna and method for controlling multiple polarizations of the antenna per a given frequency or frequencies The antenna includes a boom and a plurality of pairs of elements where each element of each pair of elements e... | 09/30/2008 |
| 7427964 | Center fed half wave dipole antenna system A center fed half-wave dipole antenna system includes first and second end brackets that are separated by a center bracket. The center bracket and each of the end brackets include a plurality of electrically isolated terminals allowing the center bracket to be coupl... | 09/23/2008 |
| 7394428 | Single pole printed antenna A printed antenna includes a smaller antenna member attached onto the circuit board, one or more greater antenna members attached onto the circuit board and electrically coupled to the smaller antenna member with conductive coupling members and coupled in series wit... | 07/01/2008 |
| 7388556 | Antenna providing downtilt and preserving half power beam width A panel antenna is provided having one or more radiating elements and a series of directors associated with each radiating element. Each series of directors is angled with respect to a direction of maximum radiation of the associated radiating element, in order to t... | 06/17/2008 |
| 7372423 | Rapidly deployable antenna system An antenna system is provided including a rapidly expandable-collapsible housing which mounts two sections of fabric material each having an array of antenna elements formed of electrically conductive material such as copper thread embedded in the fabric sections. T... | 05/13/2008 |
| 7365695 | Antenna system An antenna system for sharing of operation employs contiguous transmit frequencies. Transmit frequencies are separated into non-contiguous sub-groups isolated from one another by filters 158(+) and 160(−) associated with positive and negative polaris... | 04/29/2008 |
| 7365699 | Independently center fed dipole array A dipole array is provided for use as an Ultra Short Pulse (USP) transmitter or receiver in UWB communications systems, which reduces the output pulse dispersion. Instead of having all the dipole elements serially fed by a transmission line, the feeding in the array... | 04/29/2008 |
| 7358922 | Directed dipole antenna A dual polarized variable beam tilt antenna having a superior Sector Power Ratio (SPR). The antenna may have slant 45 degree dipole radiating elements including directors, and may be disposed on a plurality of tilted element trays to orient an antenna boresight down... | 04/15/2008 |
| 7345642 | Antenna system for radio frequency identification An antenna including an electrically conductive portion defined substantially by a self-similar geometry present at multiple resolutions. The electrically conductive portion includes two or more angular bends and is configured to radiate broadband electromagnetic en... | 03/18/2008 |
| 7339539 | Photonic crystal exhibiting negative refraction without requiring a negative effective index A periodic electromagnetic medium is disclosed that includes a surface that provides an interface with an ambient medium and a periodic structure that provides negative refraction within the medium of an incident electromagnetic field incident on the surface. In var... | 03/04/2008 |
| 7330299 | Optical amplifying arrangement using carbon nanotubes A method of using a carbon nanotube assembly comprising: arranging a signal responsive array of nanotubes on a substrate, and heterodyning a signal processed by the array of nanotubes on the substrate. ... | 02/12/2008 |
| 7327324 | Monopole slot antenna A resonant monopole slot antenna comprising a ground plane, having a radiating slot which is dimensioned such that the slot is equivalent electromagnetically to an odd number of quarter wavelengths at the antenna's operating frequency, wherein the antenna's feed is ... | 02/05/2008 |
| 7312762 | Loaded antenna A novel loaded antenna is defined in the present invention. The radiating element of the loaded antenna consists of two different parts: a conducting surface and a loading structure. By means of this configuration, the antenna provides a small and multiband performa... | 12/25/2007 |
| 7294935 | Integrated circuits protected against reverse engineering and method for fabricating the same using an apparent metal contact line terminating on field oxide Semiconducting devices, including integrated circuits, protected from reverse engineering comprising metal traces leading to field oxide. Metallization usually leads to the gate, source or drain areas of the circuit, but not to the insulating field oxide, thus misle... | 11/13/2007 |
| 7292197 | Microstrip log-periodic antenna array having grounded semi-coplanar waveguide-to-microstrip line transition A log-periodic antenna having a layer of dielectric media interposed between a microstrip log-periodic portion and a slot log-periodic portion is described. Also described are antenna embodiments having a curvilinear, electrically conductive feed line and a substant... | 11/06/2007 |
| 7292201 | Directional antenna system with multi-use elements Systems and methods for a wireless communication device having a switched multi-beam antenna and methods for manufacturing the same are described. One system and method includes a plurality of antenna of elements. Groups of the antenna elements cooperate to form act... | 11/06/2007 |
| 7292196 | System and apparatus for a wideband omni-directional antenna Embodiments generally relate to an antenna. The antenna includes at least two slot radiators, where each slot radiator has an input port and a profile that has been defined to optimize the return loss bandwidth of the antenna. The antenna also includes a transmissio... | 11/06/2007 |
| 7286092 | Radiocommunications antenna with misalignment of radiation lobe by variable phase shifter A radiocommunications antenna, notably for cellular radiotelephony network base station, of radiation lobe depointing type induced by variable phase adjustment unit including an actuating device including an actuator (13 or 41) whereof the displacement... | 10/23/2007 |
| 7286097 | Yagi antenna with balancing tab An antenna minimizes radiation from the outer conductor (44) of a coaxial cable (40) that is coupled to the antenna by providing a balancing tab (90) that lies near the connection (72) of the cable outer conductor (44) to the anten... | 10/23/2007 |
| 7276990 | Single-pole multi-throw switch having low parasitic reactance, and an antenna incorporating the same A switch arrangement comprises a plurality of MEMS switches arranged on a substrate about, and close to, a central point, each MEMS switch being disposed on a common imaginary circle centered on the central point. Additionally, and each MEMS switch is preferably spa... | 10/02/2007 |
| 7259725 | Log-periodic dipole array antenna A log-periodic dipole array antenna including a dielectric substrate, and antenna elements, symmetrical microstrip lines and baluns disposed on two corresponding surfaces of the substrate is provided. The antenna elements on each surface are connected to one side of... | 08/21/2007 |
| 7256751 | Fractal antennas and fractal resonators 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... | 08/14/2007 |
| 7253699 | RF MEMS switch with integrated impedance matching structure An impedance matching structure for a RF MEMS switch having at least one closeable RF contact in an RF line, the impedance matching structure comprising a protuberance in the RF line immediately adjacent the RF contact that forms one element of a capacitor, the othe... | 08/07/2007 |
| 7245269 | Adaptive beam forming antenna system using a tunable impedance surface A method of and apparatus for beam steering. A feed horn is arranged so that the feed horn illuminates a tunable impedance surface comprising a plurality of individually tunable resonator cells, each resonator element having a reactance tunable by a tuning element a... | 07/17/2007 |
| 7242063 | Symmetric non-intrusive and covert technique to render a transistor permanently non-operable A technique for and structures for camouflaging an integrated circuit structure. The technique including forming active areas of a first conductivity type and LDD regions of a second conductivity type resulting in a transistor that is always non-operational when sta... | 07/10/2007 |
| 7239283 | Antenna There is disclosed an antenna having a tapered radiating element possessing a slow-wave structure along a tapered radiating edge thereof. The radiating element is combined with a ground plane conductor to form a monopole antenna. The slow-wave structure supports an ... | 07/03/2007 |
| 7233217 | Microstrip phase shifter A phase shifter adjusts the phase between two segments of an RF feed line that are fed with the phase shifter. Specifically, the phase shifter adjusts the phase between two signals in RF feed line segments by changing the electrical path lengths that RF energy trave... | 06/19/2007 |
| 7228156 | RF-actuated MEMS switching element An RF-actuated microelectromechanical systems (MEMS) switch for use with switchable RF structures such as antennas and reflectors is disclosed. An antenna within each MEMS switch module is coupled to a circuit that provides a trigger voltage based on an RF control s... | 06/05/2007 |
| 7221239 | Variable power divider A variable power divider and method can vary the RF power between ports in a high power and multi-carrier RF environment, such as is used in controlling signals sent and received in a base station antenna. The variable power divider can include a single-control phas... | 05/22/2007 |
| 7221326 | Biconical antenna A biconical antenna according to the present invention includes a columnar dielectric member having frustum-shaped cavities extending respectively from an upper surface and a lower surface toward a center of the columnar dielectric member, wherein flat surfaces of a... | 05/22/2007 |
