Abstract: The present invention provides an embedded antenna. It is to form meanders on a radiating element of the embedded antenna for dividing the resonant length of the radiating element into several short resonant length to extend the bandwidth of the radiating element. It is also to form meanders on the radiating element to extend the resonant length. This design can minimize the size of the embedded antenna and achieve the same as performance of a larger size antenna.

Abstract: A wireless communication device comprising a substrate, an antenna unit mounted on the substrate, and multiple conductive pads at one or more periphery regions of the substrate, one conductive pad among the multiple conductive pads being connected with and providing impedance matching to the antenna unit.

Abstract: An RF antenna structure (e.g., a planar array) includes at least one radiation cell (and typically many, e.g., 16 or 32 or 64, etc.) having a conductive enclosure and an upper probe and a lower probe located at different heights within the enclosure. The enclosure between the upper probe and a bottom of the cell has at least two different cross-sectional areas. The upper and lower probes are preferably oriented at substantially 90° relative to each other. An upper portion of the enclosure beneath the upper probe may have a larger dimension than a lower portion such that the upper portion allows propagation of waves generated by the upper probe in a predetermined frequency band while the lower portion (e.g., above the lower probe) does not substantially allow propagation of waves generated by the upper probe, in the predetermined frequency band.

Abstract: 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 energy. The antenna further includes an electrically non-conductive portion that structurally supports the electrically conductive portion.

Abstract: A dipole part of a length shorter than half of an antenna resonance wavelength is placed so as to be rolled and enables a feeding part 11 to feed a chip. An inductance part 12 for adjusting the inductance of the antenna is provided so as to sandwich the feeding part 11. The inductance 12 is provided using an empty space of the inside of the rolled dipole part. By providing the inductance part 12, the inductance of the antenna can be adjusted so as to resonate at a predetermined frequency with the capacitance of the chip connected to the feeding part 11. At this time, although the radiation resistance of the antenna becomes extremely large according to calculations, it is actually almost the same as the resistance of the chip due to loss, and the power received by the antenna can be provided to the chip.

Abstract: A broadband antenna has a substrate, a coupling conductor, a conductor string, a ground conductor and a ground plane. The coupling conductor has a first coupling member and a second coupling member being separated from each other. The conductor string and the ground conductor are connected to the second coupling member. The conductor string extends along a direction opposite to the second coupling member. The ground conductor is connected to the ground plane. The broadband antenna uses the coupling conductor and the ground conductor to adjust input impedance for impedance match. The conductor string functions as a multi level resonance circuit to increase impedance bandwidth.

Abstract: A “breathable” radome that has an air-permeable structure is disclosed. The air-permeable structure permits a relatively greater flow of cooling air to be drawn over the radiating elements of an air-cooling system that is used for the electronics that are being sheltered by the radome. The increase in cooling efficiency that results from the use of the breathable radome enables air-cooled systems to be used with relatively higher-powered electronics.

Abstract: A device for detecting the position occupied by a mobile element operatively associated therewith in relation to a reference position, comprising at least one container containing a fluid and a detector device operatively connected to said container, said detector device being configured so as to provide a signal to indicate the actual position of said mobile element as a function of at least one parameter recorded thereby and indicative of an operative condition of the fluid, or of a condition of operative interaction between the fluid and the detector device.

Abstract: The electronic flash unit disclosed comprises: a transformer (14) to vary voltages of a power supply; an accumulator (16) composed of a main capacitor (17) to charge an electric energy supplied from the transformer (14); a lamp unit (4) provided with a flashlamp (20), set inside of a reflector (19), that flashes by discharging of energy storages in the main capacitor (17) upon applying a voltage on a trigger terminal (21); and a trigger circuit (10) to generate the voltage to apply on the trigger terminal (21), wherein at least the lamp unit (4) is coated with an insulation material.

Abstract: There is provided with an antenna device including: a first wire antenna element having a length about half a wavelength of a radio wave in use; a second wire antenna element which is in a same plane as the first wire antenna element and substantially perpendicular to the first wire antenna element, and which is connected to the first wire antenna element at one end; a third wire antenna element which is in the same plane as the first wire antenna element and substantially in parallel with the first wire antenna element, and which is connected to the second wire antenna element; and a feed point provided on the second wire antenna element.

Abstract: A system and method for mounting one or more radio antennas in an outdoor enclosure by placing a ground plane underneath the antennas and above any electrical devices. The ground plane may be used to mount the antennas in any configuration and be coupled to earth ground. In some embodiments, an outdoor enclosure may have a weatherproof radome mounted around the antennas.

Abstract: An antenna comprises a first antenna element, which has a first helix, and a second antenna element, which has a second helix. The first and the second antenna elements each have a feed point at an outer end of the corresponding helix and an open end at an inner end of the corresponding helix. A symmetrical helix antenna according to the invention can be integrated in a comparatively simple manner in an existing system, for example in a hearing aid. By integrating the antenna in a plastic housing, the antenna cannot be seen at all from the outside. The antenna is comparatively small in relation to conventional antennas.

Abstract: An antenna device, includes a plurality of substrate type antennas arranged in a direction, each of the substrate type antennas includes a dielectric substrate, an electric supply line that includes a microstrip line and is formed on the dielectric substrate, and antenna elements each of which includes microstrip lines and formed on the dielectric substrate, and a reflector plate located along the direction that the substrate type antennas are arranged. The substrate type antennas each have different angles of inclination relative to the reflector plate.

Abstract: The radiation properties and wave guiding properties of frequency selective surfaces are used in conjunction with closely spaced antenna elements to fabricate antenna structures having adjustable radiation characteristics. The direction, magnitude, and polarization of radiation patterns for such antenna structures can be adjusted by varying the texture or patterning of layers of conducting material forming the frequency selective surfaces. The invention enables the fabrication of low profile antenna structures that can easily be conformed or integrated into complex surfaces without sacrificing antenna performance.

Abstract: A metalized circuit suitable for application as a radio frequency antenna is produced by forming an antenna coil pattern on a flexible substrate. The antenna coil pattern is formed using a conductive ink which is patterned on the substrate. The conductive ink is cured and an electrical-short layer is formed across the coils of the conductive ink pattern. An insulating layer is formed over top of the electrical-short layer, a metal layer electroplated on top of the conductive layer, and then the electrical-short layer is removed. The use of the electrical-short layer during the electroplating allows for the voltage at the different points on the conductive ink layer to be relatively similar, so that a uniform electroplate layer is formed on top of the conductive ink layer. This results in a better quality radio frequency antenna at a reduced cost.

Abstract: A programmable antenna includes a fixed antenna element and a programmable antenna element that is tunable to one of a plurality of resonant frequencies in response to at least one antenna control signal. A programmable impedance matching network is tunable in response to at least one matching network control signal, to provide a substantially constant load impedance. A control module generates the antenna control signals and the matching network control signals, in response to a frequency selection signal.

Abstract: A lower-cost and more precise control methodology of regulating the output voltage of a flyback converter from the primary side is provided, which works accurately in either continuous voltage mode (CCM) and discontinuous mode (DCM), and can be applied to most small, medium and high power applications such cell phone chargers, power management in desktop computers and networking equipment, and, generally, to a wide spectrum of power management applications. Two highly integrated semiconductor chips based on this control methodology are also described that require very few components to build a constant voltage flyback converter.

Abstract: A dielectrically-loaded helical antenna has a ceramic cylindrical core and, formed on the cylindrical surface of the core, a plurality of conductive helical antenna elements. The antenna elements are coupled to a pair of feed connection conductors generally centrally located on an end surface of the core, the coupling between the antenna elements and the feed connection conductors being by way of a matching section comprising a laminate board having at least three conductive layers and insulative layers between the conductive layers arranged in an alternating manner. Each conductive layer has a first portion forming part of a respective shunt capacitance, the conductive layers and the insulative layers together acting to form a plurality of capacitors shunt-connected across the antenna elements. One of the conductive layers includes a second portion forming a series inductance between one of the feed connection conductors and at least one of the antenna elements.

Abstract: Antenna apparatus, and an associated methodology, for a multi-frequency-band-capable radio device, such as a quad-band mobile station. The antenna apparatus forms a hybrid strip antenna having a pair of resonant elements. A first resonant element forms a peripheral loop extending about the periphery of a substrate. A meander line extends along a portion of the peripheral loop. And, second resonant element is formed of an L-shaped strip. The peripheral loop is resonant at a set of frequencies, and the L-shaped strip is resonant at a single frequency. Through appropriate selection of the lengths of the resonant elements, the frequencies at which the elements are resonant are controlled.

Abstract: A monoconical antenna comprises: a substantially conical concavity formed in one end face of a dielectric; a radiation electrode provided on the surface of the concavity; and a ground conductor provided in proximity to and substantially in parallel with the other end face opposite the one end face of the dielectric. The monoconical antenna is so constituted that electrical signals are fed to between the near vertex region of the radiation electrode and the region of the ground conductor. The half-cone angle ? of the substantially conical concavity formed in the one end face of the dielectric is determined by a predetermined rule corresponding to relative dielectric constant ?r. Thus, the quality of wideband characteristics inherent in the monoconical antenna can be sufficiently maintained, and further size reduction can be accomplished by dielectric loading.