Abstract:
A broadband antenna element for RF transmission and reception over cellular frequencies. The antenna element is formed of conductive material on a substrate surface of conductive material in the form of a pair of half portions extending in opposite directions to distal tips defining the widest distance of a mouth of a cavity. The mouth converges to reduce in cross-section to a narrowest point at a plurality of different flare angles defined by the edges of the two half portions in between the pair of half portions forming the element. The resulting antenna element radiates and receives a wide band cellular frequencies enabling a single element to serve different providers operating on different frequency bands in the cellular spectrum between 680 MHz to 1900 MHz.
Abstract:
An antenna element employable singularly or in an array and configured for concurrent RF transmission and receipt on a plurality of frequencies concurrently. The element is formed of conductive material on a substrate by a pair of substantially identical horns extending in opposite directions to distal tips. A cavity formed between the horns narrows to a narrowest point prior to curving. The element is capable of wideband RF communication on any frequency between a low frequency defined by the distance between the distal tips to a highest frequency defined by the narrowest point of the cavity. The antenna is especially well adapted for portable devices such as smartphones where concurrent cellular, Wi-Fi, and bluetooth communications may be accomplished with a single element.
Abstract:
A composition comprising a fluorinated pyridinium cationic compound of formula (I) wherein Rf is R1(CH2CH2)n—, R1 is a C7 to C20 perfluoroalkyl group interrupted by at least one catenary oxygen atom, each oxygen bonded to two carbon atoms, n is an integer of 1 to 3, and R is H, C1 to C5 linear or branched alkyl, or C1 to C5 linear or branched alkoxy, having surfactant properties for lowering surface tension in an aqueous medium or solvent medium, and for use as a foaming agent.
Abstract:
The application discloses an illumination apparatus comprising: a light source configured to generate light; a detector configured to detect the posture of an object within a time period and generate a plurality of signals corresponding to this time period; and a processor configured to determine the status of the object within the time period, based on the plurality of signals, and adjust the light source to generate light corresponding to the determined status of the object.
Abstract:
A protection film includes a base film, a layer of adhesive, and a partition film. The base film includes a main portion and a handle portion extending from a periphery of the main portion. The main portion and the handle portion include a pair of opposite first surfaces. The adhesive is uniformly coated on one of the first surfaces. The adhesive is continuously coated on the main portion and the handle portion. The partition film includes a pair of opposite second surfaces. One of the second surfaces is adhered to a portion of the adhesive coated on the handle portion.
Abstract:
An illuminating system includes a universal lamp holder. The universal lamp holder includes a switch unit, a starter, a ballast, a first socket and a second socket. The ballast is connected to the voltage-input terminal and the first socket. The starter is connected to the first socket and the switch unit. The second socket is connected to the switch unit and the voltage-output terminal, and the switch unit is configured for selectively connecting the second socket to the voltage-input terminal or connecting the second socket to the starter. When the second socket is switched to connect to the voltage-input terminal, the illuminating system is switched to an LED lamp mode, and when the second socket is switched to be connected to the starter, the illuminating system is switched to a fluorescent lamp mode.
Abstract:
A water spray structure includes an outer housing, an inner sleeve, a mesh member, a spray member and an end cap. The inner sleeve is located in the outer housing. A gap is defined between an outer wall of the inner sleeve and an inner wall of the outer housing. The inner sleeve has apertures thereon. The spray member is located in the inner sleeve and has a plurality of through holes around a circumferential portion thereof. Each of the through holes has a large upper part and a small lower part. The spray member has stop pieces under the through holes. The stop pieces are disposed in a tangent direction. A mixing chamber is defined between a lower end of the spray member and a lower portion of the inner sleeve. The spray member has the plurality of through holes disposed around the circumferential portion of the spray member, the inlets and the transversal inlets to separate water to flow in the through holes. The stop pieces are disposed under the through holes to disperse the water in a spiral form. The tapered through holes form a negative pressure in the spray member for mixing with the air so as to form oxygenated mist. The water stream becomes comfortable.
Abstract:
A radiator element for RF communications formed of a planar conductive material positioned upon a planar dielectric substrate surface. Two lobes formed of the conductive material have side edges abutting a cavity decreasing in cross section between the lobes. The cavity has a widest point configured to receive RF frequencies at the lowest frequency and a narrowest point configured to receive a highest frequency of the element. Opposing pairs of notches in the side edges of the lobes along the decreasing edges of the cavity enhance the frequency of operation for frequencies paired to the distance between the pairs of notches.
Abstract:
A fluorinated pyridinium cationic compound of formula (I) wherein, Rf is F(CF2)6(CH2CF2)m(CH2CH2)n—, m and n are each independently integers of 1 to 3, and R is H, C1 to C5 linear or branched alkyl, or C1 to C5 linear or branched alkoxy, having surfactant properties for lowering surface tension in an aqueous medium or solvent medium, and for use as a foaming agent.
Abstract:
A composition which provides surface effects to substrates comprising a polymer containing at least one urea linkage prepared by (i) reacting (1) at least one organic diioscyanate, polyisocyanate, or mixture thereof, and (2) at least one fluorochemical compound of Formula I Rf—O(CF2CF2)r(CH2CH2)q(R1)sXH Formula (I) wherein Rf is a linear or branched C1 to C7 perfluoroalkyl optionally interrupted by one to three oxygen atoms, r is 1 to 3, q is 1 to 3, s is 0 or 1, X is O, S, or NR2 wherein R2 is H, or C1 to C6 alkyl, and R1 is a divalent radical selected from —S(CH2)n—, p is 1 to 50, and R3, R4 and R5 are each independently H or C1 to C6 alkyl; (ii) and then reacting with (3) water, a linking agent, or a mixture thereof.