Abstract: An electronic device comprising a first conductive unit and a second conductive unit disposed such that a gap exists between the first component and the second component. The electronic device further includes one or more components disposed along the gap and configured to counteract one or more capacitance effects in the gap, wherein at least one of the first conductive unit and the second conductive unit represents a part of an antenna. By counteracting the capacitance effects in the gap, certain radiation attributes of the antenna, such as radiation efficiency, can be improved. The one or more components are also employed to counteract one or more capacitance effects in a slot of a conductive unit in an electronic device.

Abstract: Embodiments provide multi-band, compound loop antennas (multi-band antennas). Embodiments of the multi-band antennas produce signals at two or more frequency bands, with the two or more frequency bands capable of being adjusted and tuned independently of each other. Embodiments of a multi-band antenna are comprised of at least one electric field radiator and at least one monopole formed out of the magnetic loop. At a particular frequency, the at least one electric field radiator in combination with various portions of the magnetic loop resonate and radiate an electric field at a first frequency band. At yet another particular frequency, the at least one monopole in combination with various portions of the magnetic loop resonate and radiate an electric field at a second frequency band. The shape of the magnetic loop can be tuned to increase the radiation efficiency at particular frequency bands and enable the multi-band operation of antenna embodiments.

Abstract: Embodiments provide multi-band, compound loop antennas (multi-band antennas). Embodiments of the multi-band antennas produce signals at two or more frequency bands, with the two or more frequency bands capable of being adjusted and tuned independently of each other. Embodiments of a multi-band antenna are comprised of at least one electric field radiator and at least one monopole formed out of the magnetic loop. At a particular frequency, the at least one electric field radiator in combination with various portions of the magnetic loop resonate and radiate an electric field at a first frequency band. At yet another particular frequency, the at least one monopole in combination with various portions of the magnetic loop resonate and radiate an electric field at a second frequency band. The shape of the magnetic loop can be tuned to increase the radiation efficiency at particular frequency bands and enable the multi-band operation of antenna embodiments.

Abstract: A radiators has looped radiation conductors, an inductor, a capacitor, a feed point on the radiation conductor. The capacitor is formed by a capacitance between the radiation conductors, and the capacitance varies depending on positions on the radiation conductors within a portion where the radiation conductors are close to each other. The radiators is configured to: resonate along a portion of the radiator at a low-band resonance frequency, the portion including the inductor and the capacitor and being along the loop of the radiation conductor, and resonate along a portion of the radiator at a high-band resonance frequency, the portion including a section along the loop of the radiation conductor, the section including at least one of the at least one capacitor, not including the inductor, and extending between the feed point and the inductor.

Abstract: According to one embodiment; an antenna device according to this embodiment includes the first antenna element formed from a folded monopole element and a capacitor element. The first antenna element has a first end connected to a feeding terminal, a second end connected to the first ground terminal, and a middle portion folded, with a stub being provided between the forward portion and backward portion formed by this folding. The capacitor element is inserted between the stub and the above feeding terminal of the forward portion of the first antenna element.

Abstract: Provided is a simply fabricable small zeroth-order resonant antenna with extended bandwidth and high efficiency. The zeroth-order resonant antenna includes a feeding patch, a transmission line, and a pair of ground patches. The feeding patch is disposed on a top surface of a substrate having a mono-layer structure, and is configured to receive a signal from the outside. The transmission line includes a unit cell disposed on the top surface of the substrate and is configured to transmit a signal delivered from the feeding patch. The pair of ground patches is longitudinally disposed on the top surface of the substrate in the same direction as a longitudinal direction of the transmission line around the transmission line. The unit cell includes an upper patch and an inductor unit. The upper patch is disposed on the top surface of the substrate and is configured to receive a signal.

Abstract: The disclosure provides an antenna feeding structure having a low frequency loop, an intermediate frequency loop, and a high frequency loop, and generates resonance between the inductance of the intermediate frequency loop itself and a capacitive element in the intermediate frequency loop, wherein the antenna feeding structure is configured to be able to adjust the resonance frequency using the area of the loop and the value of the capacitive element, thereby allowing the antenna to have a broadband characteristic, and further, making it possible to easily design an antenna having a desired band.

Abstract: An exemplary embodiment of an antenna device generally includes a radiator structure with at least one first radiator element. The antenna device also includes a first feeding connection coupling the radiator structure to a first radio circuit for operation in a first frequency band. The antenna device further includes a second feeding connection coupling the radiator structure to a second radio circuit for operation in a second frequency band. A set of capacitors is connected to the radiator structure. This set includes at least one capacitor where a first end of each capacitor in the set is connected to the radiator structure and a second end is provided at ground potential, at least for the first frequency band. The sum of the values of the capacitors in the set is below 15 picofarads.

Abstract: An antenna structure intended for small-sized mobile terminals. In one embodiment, the antenna structure comprises a main radiator for implementing the lowest operating band and other radiators for implementing at least one operating band in the high band. The structure also comprises a matching circuit, by which a plural (e.g., double) resonance is implemented for the main radiator in the range of the lowest operating band and the isolation is improved between the main radiator and another radiator. A reactive element is joined to the main radiator so that its electric size decreases in the high band and increases in the low band. The former strengthens the resonances in the high band, and thus results in rise in the efficiency in the high band.

Abstract: A Radio-Frequency IDentification (RFID) receiver is disclosed that comprises a plurality of resonant structures arranged to form an antenna. The resonant structures are interconnected in series and are arranged, relative to one another, so as to achieve a received electrical signal with an increased voltage, when the antenna is exposed to an incident electromagnetic signal. This occurs for a majority of all possible incident electromagnetic signals and, therefore, an RFID receiver based on such an antenna provides, in a majority of cases, an improved performance.

Abstract: A disclosed antenna device includes a substrate made of a dielectric material, an antenna element formed on one side of the substrate, and a ground element formed on another side of the substrate.

Abstract: An antenna including a capacitive element and an inductive element having first and second ends, the first end of the inductive element being galvanically connected both to a feed point and to the capacitive element at a first connection point, the second end of the inductive element being galvanically connected to the capacitive element at a second connection point, the second connection point being spatially displaced from the first connection point, wherein electrical signals at the first and second connection points are mutually out of phase.

Abstract: A multi-band antenna includes two conductive wirings and unit circuits cascaded along the conductive wirings. Each unit circuit includes a communication unit, a first capacitor and a second inductor. The communication unit connects between the conductive wirings through a first inductor and a second capacitor connected in series with the first inductor. The first capacitor and the second inductor are inserted in at least one of the conductive wirings. The second inductor is connected in parallel with the first capacitor. Alternatively, the unit circuit includes a communication unit connecting between the conductive wirings through a first inductor, and a first capacitor inserted in at least one of the conductive wirings. The first inductor, the first capacitor, a third capacitor disposed between the conductive wirings, and a third inductor disposed on at least one of the conductive wirings satisfy a relationship expressed by the expression 2.

Abstract: An antenna device is arranged to transmit or receive a radio frequency communication signal to or from an external device such as a reader/writer, and is arranged such that an antenna resonance circuit including an antenna coil and a capacitor is connected to an additional resonance circuit including an inductor and a capacitor. A radio frequency IC device preferably includes the antenna device and a radio frequency IC. The antenna device is constructed such that a change in characteristics thereof caused by a change in the distance between a radio frequency IC device and a reader/writer is minimized, and the radio frequency IC device performs communication with high reliability.

Abstract: Antenna embodiments are illustrated that are particularly suited for use in aircraft navigation, identification and collision avoidance systems. An exemplary antenna embodiment operates about a center wavelength and in association with a ground plane and comprises first and second grounded, shortened, and top loaded monopoles. These monopoles are spaced apart above a ground plane and each of them includes a feed post, a shorted post, and a top load wherein the shorted post is spaced from the feed post, is coupled to the ground plane, and has a length less than one fourth of the center wavelength. In addition, the top load is coupled to the feed post and the shorted post and is configured along orthogonal minor and major axes of the top load to have a width along the minor axis and a length along the major axis that exceeds the width.

Abstract: A mobile wireless communications device may include a portable housing, at least one wireless transceiver carried by the portable housing, and at least one satellite positioning signal receiver carried by the portable housing. The device may also include an antenna assembly carried by the portable housing. The antenna assembly may include a base conductor having a pair of shorted antenna feed points defined therein and coupled to the at least one wireless transceiver and the at least one satellite positioning receiver, and a first conductor aim extending outwardly from the base conductor. The antenna assembly may also include a second conductor arm also extending outwardly from the base conductor. The second conductor arm may include a proximal conductor portion adjacent the base conductor, a distal conductor portion, and an inductor-capacitor circuit coupling the proximal and distal conductor portions.

Abstract: An earphone antenna of a mobile terminal having a switching function by taking radiation characteristics of an antenna into consideration when the earphone antenna is used for receiving Frequency Modulation (FM) radio broadcasting and Digital Multimedia Broadcasting (DMB) is provided. The earphone antenna includes a first connector cable including a first antenna line for receiving DMB, a second connector cable including a second antenna line connected to the first antenna line for receiving FM radio broadcasting, and a switch positioned between the first connector cable and the second connector cable for electrically connecting and separating the first antenna line to and from the second antenna line. The single earphone antenna supports an FM radio broadcasting antenna and a DMB antenna.

Abstract: An electromagnetic band-gap structure includes a circuit board, a ground plane and a plurality of electromagnetic band-gap units. The circuit board includes a first side and a second surface, and the ground plane disposed on the first side. The plurality of electromagnetic band-gap units are located on both the first surface and the second surface and connected to each other along an edge of the ground plane. Every electromagnetic band-gap unit includes a first strip line, a second strip line and a via. The first strip line is located on the first side, including a first relative long strip line and a first relative short strip line connected to the ground. The second strip line is located on the second side. The second strip line is connected to the first strip line of the adjacent electromagnetic band-gap unit through the via.

Abstract: A communication device including an antenna structure is provided, wherein the antenna structure includes a ground element, an antenna element, and a circuit element group. The ground element has a notch at one of its edges, and a long edge of the notch is at least two times longer than a short edge of the notch. The antenna element includes a metal portion disposed in the notch. Two ends of the metal portion are extended away from each other and are positioned substantially at or around two opposite edges of the notch. One end of the metal portion is coupled to the ground element, and the other end of the metal portion is a feeding terminal of the antenna element. The circuit element group includes at least a capacitive element and an inductive element.

Abstract: A multiband antenna includes a feed unit, a first transceiving unit, a second transceiving unit, and a resonance unit. When feed signals are input from the feed unit, the feed signals are respectively transmitted to the first transceiving unit and the second transceiving unit to enable the first transceiving unit and the second transceiving unit to respectively receive and send wireless signals of different frequencies. In addition, the resonance unit is driven to resonate and serve as a coupled ground resonator that generates additional current paths of at least two different lengths. Such that the resonance unit is enabled to receive and send wireless signals of at least two additional frequencies, and the multiband antenna is further enabled to receive and send wireless signals in more than two frequency bands.

Abstract: There is provided an antenna device including a substrate, an earth section which is disposed on a portion of the substrate, a feed point which is disposed on the substrate, a loading section disposed on the substrate and constructed with a line-shaped conductor pattern which is formed in a longitudinal direction of an elementary body made of a dielectric material, an inductor section which connects one end of the conductor pattern to the earth section, and a feed point which feeds a current to a connection point of the one end of the conductor pattern and the inductor section, wherein a longitudinal direction of the loading section is arranged to be parallel to an edge side of the earth section.

Abstract: A multiband antenna includes a feed unit, a transceiving unit, and a resonance unit positioned adjacent to but separate from the feed unit and the transceiving unit. When feed signals are input to the feed unit, the feed signals are transmitted to the transceiving unit to form current paths of different lengths, and the resonance unit is driven to resonate and generates additional current paths of different lengths. In this way, the transceiving unit and the resonance unit are enabled to respectively receive and send wireless signals of different frequencies, and thus the multiband antenna is capable of receiving and sending wireless signals in more than two frequency bands.

Abstract: An antenna includes a first antenna portion, a second antenna portion, a third antenna portion, a feed portion, and a ground portion. The first antenna portion perpendicularly connects to the feed portion and the ground portion. The second antenna portion connects to the first antenna portion. The third antenna portion connects to the feed portion. The first antenna portion and the second antenna portion are both located on a plane perpendicular to the feed portion. The feed portion, the ground portion, and the third antenna portion are coplanar.

Abstract: A frequency stabilization device includes a first radiating element, a second radiating element, a feeding circuit connected to the first and second radiating elements, and a frequency stabilization circuit disposed between the feeding circuit and the first radiating element. The frequency stabilization circuit includes a primary-side series circuit connected to the feeding circuit and a secondary-side series circuit coupled to the primary-side series circuit via an electric field or a magnetic field. A first inductance element and a second inductance element are connected in series to each other, and a third inductance element and a fourth inductance element are connected in series to each other. The first and third inductance elements are coupled to each other, and the second and fourth inductance elements are coupled to each other.

Abstract: An antenna operable over a predetermined range of frequency includes a transmission line, a transformer network connected to one end of the transmission line, and at least one ferrite/powder iron network connected to an opposite end of the transformer network. The ferrite/powder iron network changes the effective electrical length of the antenna such that as the frequency of operation changes, the current distribution above and below the network changes in corresponding manner. A second ferrite/powder iron network may be serially positioned with respect to the other network, wherein both function to reduce the current thereabove. Accordingly, as the frequency of operation increases, the electrical height of the antenna decreases. The network also encompasses a way to safely dissipate otherwise destructive heat created by the operation of the antenna system at high radio-frequency power.

Abstract: A communication device is provided, including a ground element, a substrate and an antenna. The substrate is adjacent to the ground element. The antenna provides a first band and a second band, and the antenna is disposed on the substrate. The antenna includes a radiator, a feed conductor, a capacitor unit and a short-circuiting unit. An end of the feed conductor is connected to a signal source, and another end of the feed conductor is electrically connected to the radiator. The capacitor unit is disposed on the feed conductor. The short-circuiting unit includes a first short-circuiting path and a second short-circuiting path, wherein the first and a second short-circuiting paths electrically connect the radiator to the ground element, the first short-circuiting path has a first path length, the second short-circuiting path has a second path length, and the first and second path lengths are longer than 0.05 times that of a wavelength of a lowest frequency of the first band.

Abstract: A solid antenna configured above a substrate includes a short portion, a feeding portion and a radiating portion including four radiators connected one-by-one. A first radiator includes a first upper section on a first plane, a first lower section on a second plane, and a first connection section connecting the first upper section to the first lower section. The second radiator includes a second upper section on the first plane, and a second connection portion connecting the second upper section to the first lower section. The third radiator includes a third upper section and a fourth upper section on the first plane, a second lower section on the second plane, a third connection section connecting the third upper section to the second lower section, and a fourth connection section connecting the second lower section to the fourth upper section. The fourth radiator extends towards the substrate.

Abstract: A mobile communication device is provided. The mobile communication device includes a system circuit board with a surface, a ground plane having a monopole slot on the surface, a microstrip feedline, and a metal element, wherein the ground plane has a longer edge and a shorter edge. The monopole slot has a first operating band and a second operating band. The microstrip feedline is located on the system circuit board, wherein one end of the microstrip feedline passes over the monopole slot, and the other end of the microstrip feedline is connected to a signal source. The metal element is electrically connected to the shorter edge of the ground plane, and is substantially perpendicular to the ground plane. A distance between the open end of the monopole slot and the shorter edge of the ground plane where the metal element is connected is shorter than 0.05 wavelength of the lowest operating frequency of the first operating band.

Abstract: A multi-band antenna comprising a conductive structure and a plurality of current probes coupled around the conductive structure is disclosed. An existing antenna capable of generating H fields having a first signal line is converted into a multi-signal line antenna with increased frequency capabilities, by mounting a first current probe having a designated frequency range about a periphery of the existing antenna; coupling a second signal line to the first current probe; and performing at least one of transmitting and receiving via at least one of the first and second signal lines, wherein the mounting of the first current probe to the existing antenna improves a voltage standing wave ratio (VSWR) of the existing antenna and the second signal line operates as an independent signal line for signal reception/transmission within the designated frequency range.

Abstract: An antenna includes a metal member, an antenna, and a capacitor. The metal member includes a plurality of sidewalls connecting with each other. The antenna includes a fixing end and a free end, the fixing end is fixed to the metal member. The capacitor connects with the metal member and the free end of the antenna.

Abstract: When first and second housings are in an open state, first and second switches are electrically opened, and thus, a first antenna element and a ground conductor operate as a first dipole antenna, and a second antenna element and the ground conductor operate as a second dipole antenna with isolation from the first dipole antenna by the slit. When the first and second housings are in the closed state, the first and second switches are electrically closed, and thus, the first antenna element operates as a first inverted F antenna on the ground conductor, and the second antenna element operates as a second inverted F antenna on the ground conductor with isolation from the first inverted F antenna by the slit.

Abstract: The present invention provides a multiple band antenna, including a first radiation element adapted to resonate at a first resonant frequency band by employing a resonant length, which is reduced by a coupling effect with a neighboring radiation element, a power feed unit coupled to one lower side of the first radiation element, a first inductor coupled in series to the other lower side of the first radiation element, a second radiation element adapted to face the first radiator to thereby obtain the coupling effect, wherein the second radiation element has a predetermined lower portion coupled to the first inductor, a second inductor having one end coupled in series to a predetermined upper portion of the second radiation element, and a third radiation element coupled to the other end of the second inductor, wherein the third radiation element operates as one radiation element together with the second radiation element and resonates at a second frequency band.

Abstract: A communication device is presented that has a multiband antenna structure. A helical load extends from a monopole and reduces the resonance frequency of the monopole to the UHF band while leaving a GPS resonance of the monopole substantially unchanged. Helical proximate and distal portions are connected to the load such that the overall antenna structure has a VHF resonance. The helical portions have different characteristics and are configured to not substantially affect the UHF or GPS resonances. The helical portions have different pitch angles to permit minimization of the length of the combined helical portions while providing a desired operating VHF bandwidth.

Abstract: Disclosed is an antenna using a reactive element that is capable of individually controlling the respective resonance frequencies and resonance bandwidths. The antenna includes a radiator electrically coupled with a feeding point, a first reactive element electrically coupling a first point and a second point of the radiator, and a second reactive element electrically coupling a third point and a fourth point of the radiator. Here, the reactive elements are each coupled to the radiator in parallel, and because of the reactive elements, the antenna is made to have higher-order resonance frequencies that are not integer multiple in relation to a fundamental resonance frequency.

Abstract: An antenna generating an electromagnetic field for an electromagnetic transponder and a terminal provided with such an antenna. The antenna comprises a first inductive element designed to be connected to two terminals employing an energizing voltage, and a parallel resonant circuit coupled with the first inductive element.

Abstract: An antenna arrangement may include a ground plane, a feeding branch, a first branch and a second branch. The first branch may be longer than the second branch. The feeding branch may be capacitively coupled to the first branch. The feeding branch, the first branch, and the second branch include inductor loading and may be arranged in a single plane at a distance from the ground plane.

Abstract: An antenna device includes: an antenna base plate having a shape of a flat plate; a capacity loading plate of a top capacity loaded type monopole antenna, the capacity loading plate arranged in parallel with the antenna base plate; and a planar antenna arranged between the antenna base plate and the capacity loading plate. A size of at least a part of the capacity loading plate in a direction of width of the capacity loading plate is less than about ¼ wavelength of receiving frequency of the planar antenna, and edges of the capacity loading plate in the direction of width of the capacity loading plate are folded back so that the capacity loading plate has a meander shape extending in a direction of length of the capacity loading plate.

Abstract: The invention provides a damage resistant antenna using a super-elastic flexible metallic material to form antenna radiating structures with a high damage threshold. The invention accounts for the electro-magnetic properties of the super-elastic flexible metallic material in the design of the shape and dimensions needed to form antenna radiating structures with consistent performance after repeated deploy, stow, and transport cycling of the antenna.

Abstract: A meta-material (110) is constituted by a conductor plane (103) on the lower side, a conductor (102) on the upper side, a repeated (for example, periodic) array of conductor strips (104), and conductor posts (105) which electrically connect each of the conductor strips (104) and the conductor plane (103) on the lower side. A power feed line (106) is connected to the conductor (102). Openings may be repeatedly provided in the conductor plane (103) on the lower side. In this case, an island-shaped electrode is provided within the opening, and the conductor post (105) is connected to the conductor plane (103) through the island-shaped electrode.

Abstract: A multiband antenna having a ground plane and a radiating portion is provided. The radiating portion includes a first metal portion, a second metal portion, an inductively-coupled portion and a third metal portion. The first metal portion has a first coupling metal portion and a signal feeding line electrically connected thereto. The second metal portion has a second coupling metal portion and a shorting metal portion electrically connected thereto with a shorting point connected to the ground plane. The first and second coupling metal portions are coupled and a capacitively-coupled portion is formed therebetween. The inductively-coupled portion is connected between the third and second metal portions. The first and second metal portions enable the antenna to generate a first operating band. The first, second and third metal portions enable the antenna to generate a second operating band, the frequencies of which are lower than those of the first operating band.

Abstract: Implementations related to configurable strip-line quarter wavelength and/or antenna structures are described herein.

Abstract: The antenna of the invention includes a transceiver unit and a dielectric unit. The transceiver unit has a ground portion, a radial portion, a conductive portion and a feed portion. The ground portion and the radial portion are disposed apart in parallel, so as to form a space therebetween. The distance between the ground portion and the radial portion is defined as a transceiver unit height. The dielectric unit is disposed in the space. That is, the dielectric unit is disposed between the ground portion and the radial portion. The dielectric unit has a dielectric unit thickness less than the transceiver unit height. In one embodiment, the ratio of the dielectric unit thickness to the transceiver unit height is preferably between 0.4 and 0.7.

Abstract: An energy responsive device. The device includes a memristor and at least one antenna. The memristor is coupled to the at least one antenna.

Abstract: The present invention is a folded monopole antenna assembly. The folded monopole antenna assembly includes a dielectric substrate, the dielectric substrate being configured for receiving at least one input. The folded monopole antenna assembly further includes a folded monopole antenna. The folded monopole antenna is configured for being connected with the dielectric substrate. Further, the folded monopole antenna includes at least one reactive circuit. The folded monopole antenna is further configured for receiving a signal via a received input included in the at least one received input. The antenna assembly is configured for implementation within an artillery shell and/or a munition.

Abstract: A capacitively loaded magnetic dipole antenna is provided with a portion that comprises a length that is longer than a straight line distance between a first end and a second end of the third portion such that antenna with a tower profile and/or smaller form factor is achieved.

Abstract: A wireless device incorporating an antenna made of Composite Right Left Hand (CRLH) structures, having a connection element coupling a portion of the antenna to a ground electrode. In some embodiments a wireless device has one or more mechanical connection units made of electrically conductive materials to provide both mechanical engagement and electrical conduction for the antenna devices.

Abstract: A frequency reconfigurable antenna may include at least two antenna segments and a photonic crystal positioned between the at least two antenna segments. The photonic crystal may selectably electrically connect or isolate the at least two antenna segments with respect to each other based on a conductive state of the photonic crystal.

Abstract: A first value of an operational center frequency of a signal to transmit is determined according to received user input. The operational center frequency is centered within a first band of frequencies and the first band of frequencies has a first bandwidth. A single loop antenna is tuned to match the first value of the center frequency and the single loop antenna is arranged and configured to operate across a second band of frequencies having a second bandwidth. The first bandwidth is less than the second bandwidth. The signal is transmitted from the single loop antenna according to the first value of the operational center frequency to provide a transmitted signal.

Abstract: A multi-frequency antenna (1) includes a grounding portion (1) extending along a transversal direction; a radiating arm (11) extending along a transversal direction and disposed above the grounding portion; a connecting arm (12) connected to the grounding portion and the radiating arm; a capacitor (13) connected to the radiating portion and the connecting arm; and a cable (15) having an inner conductor connected to the connecting arm and an outer conductor connected to the grounding portion.

Abstract: There is provided an antenna device including a substrate, an earth section which is disposed on a portion of the substrate, a feed point which is disposed on the substrate, a loading section disposed on the substrate and constructed with a line-shaped conductor pattern which is formed in a longitudinal direction of an elementary body made of a dielectric material, an inductor section which connects one end of the conductor pattern to the earth section, and a feed point which feeds a current to a connection point of the one end of the conductor pattern and the inductor section, wherein a longitudinal direction of the loading section is arranged to be parallel to an edge side of the earth section.