Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna may be in the form of a polygonal, elliptical curve and/or coil shape. The wireless communication device is coupled to the wave antenna to provide wireless communication. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its curved structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breakage that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna is a conductor that is bent in alternating sections to form peaks and valleys. The wireless communication device is coupled to the wave antenna to provide wireless communication with other communication devices, such as an interrogation reader. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its bent structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breaks that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna may be in the form of a polygonal, elliptical curve and/or coil shape. The wireless communication device is coupled to the wave antenna to provide wireless communication. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its curved structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breakage that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna is a conductor that is bent in alternating sections to form peaks and valleys. The wireless communication device is coupled to the wave antenna to provide wireless communication with other communication devices, such as an interrogation reader. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its bent structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breaks that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna is a conductor that is curved in alternating sections. The wireless communication device is coupled to the wave antenna to provide wireless communication. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its curved structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breakage that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: Provided is an antenna apparatus for a portable terminal including a first antenna pattern, and a second antenna pattern formed to correspond to the first antenna pattern, so that the second antenna provides a capacitive coupling along with the first pattern, thereby configuring a divergent type antenna with the second antenna pattern. The antenna apparatus configured in this manner comprises a pair of meander line antennas, whereby the antenna apparatus can efficiently suppress the generation of noise while being easily housed within the terminal. Furthermore, the antenna apparatus has an advantage of easily enhancing a specific absorption ratio (SAR) induced in a human body, which is an important factor for defining the function and quality of an antenna apparatus.

Abstract: A meander line antenna formed in the shape of meander is disclosed. The meander line antenna includes a bottom half section that is constituted by a folded conductive pattern of a folded dipole antenna, and includes a feeding point for mounting an IC chip at the central part; a top half section that is constituted by a folded conductive pattern of a folded dipole antenna shaped like the bottom half section; and a frequency adjusting section consisting of connecting conductive patterns arranged at an interval corresponding to a desired frequency centering on the feeding point, the connecting conductive patterns connecting the bottom half section and the top half section. The connecting conductive patterns can be cut off, and the folded conductive pattern outside of the cut-off connecting conductive patterns can be removed.

Abstract: The present invention discloses a radio frequency identification tag apparatus for a tire in a radio frequency identification system (hereinafter, referred to as a ‘RFID system’).

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna may be in the form of a polygonal, elliptical curve and/or coil shape. The wireless communication device is coupled to the wave antenna to provide wireless communication. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its curved structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breakage that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: An antenna comprises a ground pattern, and a planar element that is fed and equipped with a cut-out portion provided from the farthest edge portion formed from the feed position toward the ground pattern side, and the ground pattern and the planar element are juxtaposed with each other. The cut-out portion enables to further miniaturize the antenna and secure current paths to obtain radiation in a low-frequency range. Since the ground pattern and the planar element are juxtaposed with each other, the mount volume of the antenna can be reduced, and the antenna characteristic, particularly the impedance characteristic, can be easily controlled, and the bandwidth can be widened.

Abstract: An electronics component assembly is provided. The assembly includes a tire along with a mounting member that may include means for securing an antenna incorporated in the tire. At least a first antenna wire is present and is incorporated in the tire and connected to the mounting member. Additionally, an integrated circuit is carried by the mounting member and is in communication with the first antenna wire. Additional embodiments are provided in which the mounting member may instead have a first retaining connection that is at least partially curved in shape.

Abstract: A meander line antenna formed by folding a conductive pattern of a folded dipole antenna in the shape of meander is disclosed. The basic structure of the meander line antenna includes a bottom half section formed by a folded conductive pattern, and a feeding point arranged approximately at the center of the folded conductive pattern for mounting an IC chip, a top half section consisting of a folded conductive pattern shaped like the bottom half section, a coarse tuning section consisting of two or more short circuit conductive patterns for coarse tuning that connects countering conductive patterns of either or both of the bottom half section and the top half section at a predetermined interval, and a fine-tuning section consisting of two or more short circuit conductive patterns for fine tuning that connect countering conductive patterns of the top half section, the countering conductive patterns being located at a position that counters the feeding point, at a predetermined interval.

Abstract: A hooked stub collinear array antenna formed from a single conductor. The antenna operates at a design frequency having an associated wavelength. The antenna includes a plurality of radiating elements that are substantially one half the wavelength. The radiating elements are aligned with a longitudinal axis of the antenna. The antenna further includes a delay element connected between each of the plurality of radiating elements. The delay element is aligned with a transverse axis approximately ninety degrees from the longitudinal axis. The delay element extends approximately one quarter of the wavelength from the longitudinal axis and adjacent delay elements of a plurality of delay elements are sequentially rotated at 90 degree intervals relative to each other about the longitudinal axis. The total length of the delay element is approximately one half the wavelength.

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna is a conductor that is curved in alternating sections. The wireless communication device is coupled to the wave antenna to provide wireless communication. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its curved structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breakage that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: A tire assembly with integrated electronic components includes a tire structure and an integrated electronics assembly, which preferably includes at least a radio frequency (RF) device and a multi-frequency antenna that enables wireless communication in at least first and second resonant frequency bands. Such multi-frequency antenna further comprises at least first and second antenna wires connected to the RF device, thus facilitating the transmission of RF signals which may include information such as tire identification information or measured condition information such as tire temperature, pressure, and other characteristics. The first and second antenna wires preferably function together as at least two dipole antennas, for example, two half-wave dipole antennas, or one half-wave dipole antenna and one three-half-wave dipole antenna.

Abstract: A dual band and broadband flat dipole antenna comprises a first radiating body, a second radiating body, and a conductivity element. The first radiating body has two first frequency-radiating parts, two second frequency-radiating parts, and a first electrically connecting part. The first and second frequency-radiating parts are extended from a side of the first electrically connecting part. The second frequency-radiating parts are disposed between the first frequency-radiating parts. The second radiating body similar to the first radiating body has two first frequency-radiating parts, two second frequency-radiating parts, and a second electrically connecting part. The first and second frequency-radiating parts are extended from a side of the second electrically connecting part with the direction reversing to the extending direction of the first radiating body.

Abstract: An antenna apparatus comprising bent dipoles and fed by a quarter-wave balun transformer with a single coaxial cable feed is disclosed. In this embodiment, the antenna elements are patterned onto a dielectric circuit board which is then mounted horizontally into a molded shell. The antenna is tuned by trimming the bent dipoles patterned on the circuit board.

Abstract: A diversified planar phased array antenna includes a dielectric plate, at least two antenna units, at least one first micro-strip line and a ground layer. Two antenna units formed on the dielectric are coplanar and are connected perpendicular together by the first micro-strip line to form one with vertical field polarization and one with horizontal polarization. Each antenna unit is composed of at least two identical meander line antennas which have unique dual linear polarization property and at least one second micro-strip line connected to the at least two meander line antennas. The first micro-strip line is connected to at least two second micro-strip lines of the two antenna units. Therefore, the planar phased array antenna meets the requirements for spatial diversity, polarization diversity, radiation diversity and frequency diversity, etc. Each antenna unit can be formed by different number of meander line antennas which is determined to be the best for a specific application.

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna is a conductor that is curved in alternating sections. The wireless communication device is coupled to the wave antenna to provide wireless communication. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its curved structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breakage that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna is a conductor that is bent in alternating sections to form peaks and valleys. The wireless communication device is coupled to the wave antenna to provide wireless communication with other communication devices, such as an interrogation reader. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its bent structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breaks that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: A chip-type antenna and a snaked, band-shaped conductor as a pair of radiation elements fed at the center, a circuit unit having a transmission/reception circuit that is connected to respective feeder lines for the radiation elements, and a connector that connects, to an external circuit, lead lines leading from the circuit unit are arranged on an insulative substrate to be mounted on a mother board. The pair of radiation elements extend along two adjoining sides of the insulative substrate so as to generally assume an L-shape in a plan view.

Abstract: A multi-frequency antenna with a single layer and a single feeding point, and especially an improved microstrip antenna with its bandwidths simplified and enlarged, it has a central microstrip with a set length and a set width; the bottom end of the central microstrip is used as a feeding point, the top end thereof is extended bilaterally to form respectively a first band section and a second ban section. The first band section is provided on the end thereof with a first open circuit point, and the second ban section is provided on the end thereof with a second open circuit point. A grounding line of a set length and a set width is located at a position a distance below the feeding point on the bottom end of the central microstrip. The lengths from the feeding point to an open circuit point on the end of the first band section and to an open circuit point on the end of the second ban section are both ¼ ? of the ban section to be used.

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna is a conductor that is curved in alternating sections. The wireless communication device is coupled to the wave antenna to provide wireless communication. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its curved structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breakage that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: The invention is directed to a transmitting and/or receiving unit for building into an elastic structure. The transmitting and receiving unit includes one or more electronic circuits or circuit elements and, if needed, sensors and/or signal elements assigned thereto. The transmitting and/or receiving unit has one or several antennas connected to the electronic circuit. The antenna includes one or several filaments which are so arranged in the surface or in space that the main directions of the stresses and forces, which occur within the surrounding elastic structure/matrix, essentially intersect or cross the filament axes.

Abstract: A broadband dual-frequency tablet antenna comprises a set of dipole antennas, a baseplate, and an inductive investing-piece, in which a positive and a negative pole of the antenna-set disposed on the baseplate are composed of cambered narrow straps, respectively; the pole length is set about ¼&lgr; (wavelength) of a low-frequency band while the space between poles is set about ¼&lgr; (wavelength) of a high-frequency band; and the construction including the antenna and the baseplate is entirely invested in the inductive investing-piece. During application, by adjusting the cambered shape of the poles respectively, width of the narrow straps, interval between the narrow straps, and cooperating with inductance of the investing-piece, the harmonic bandwidth of said antenna could be widened to hence obtain the broadband dual-frequency function of the tablet antenna.

Abstract: A bended dipole antenna, which comprises an antenna substance and a radiator led out from the antenna substance, is characterized in that: the conductor in the radiator is bended and an included angle is formed between the radiator and the antenna substance, thus the antenna can be assembled to most positions of a personal electronic apparatus for wireless transmission, and a well effect on both vertical polarization and horizontal polarization can be accomplished.

Abstract: Multi-frequency, low-profile, capacitively loaded magnetic dipole antennas to be used in wireless communications. Each antenna comprises one to n antenna elements and each element having one to n arms. The various antenna embodiments can cover a range of frequencies to be determined by the shape, size, and number of elements in the physical configuration of the antenna. The antenna configuration can also be adapted to expand frequency bands covered by the antenna or to fit within space restrictions dictated by specific antenna applications.

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna is a conductor that is bent in alternating sections to form peaks and valleys. The wireless communication device is coupled to the wave antenna to provide wireless communication with other communication devices, such as an interrogation reader. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its bent structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breaks that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: A dual band antenna (1) includes a printed wiring board (PWB) (20). The PWB has an antenna trace (10) and a grounding plate (30) respectively disposed on opposite surfaces (20a, 20b) of the PWB. The antenna trace includes a radiating arm (100) and a matching means (13). The radiating arm includes a meandering segment (12) and a linking segment (11). The linking segment links two points of the meandering segment, thereby forming a closed loop. Because of the closed loop, the radiating arm has two transmission paths, one longer path, which does not include the linking segment, and one shorter path, which does include the linking segment. The dual band antenna, therefore, is capable of operating at two different frequency bands because of the two paths of the radiating arm.

Abstract: A microstrip meandering-line antenna for a wireless communications system includes a substrate, a meandering-line conductor, and a feeding wire. The substrate, which is made of a dielectric material or a magnetic material, has a first surface. The meandering-line conductor is attached to the first surface in a reciprocating bent manner for receiving radio signals, and the meandering-line conductor has a mid-point connection between two ends of the meandering-line conductor. The feeding wire is electrically connected to the mid-point of the meandering-line conductor for transmitting a received radio signal to the wireless communications system.

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna is a conductor that is bent in alternating sections to form peaks and valleys. The wireless communication device is coupled to the wave antenna to provide wireless communication with other communication devices, such as an interrogation reader. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its bent structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breaks that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: Two one-wavelength antenna elements (1) and (2) arranged in diamond-wise opposition to each other so that one-ends of the antenna elements (1) and (2) are provided with a feeding portion (3) and the other-ends (4) of the same are opened, and so that the angle (&agr;) of each of bent portions (1a) and (2a) in the centers of the antenna elements (1) and (2) respectively is selected to be an optimal angle to obtain optimal radiation directivity with a simple configuration, thereby obtaining an antenna device which has a high gain. Accordingly, a small-size and low-profile antenna device can be obtained as a mobile communication antenna in UHF and submicro wave bands.

Abstract: A wireless communication device coupled to a wave antenna that provides greater increased durability and impedance matching. The wave antenna is a conductor that is bent in alternating sections to form peaks and valleys. The wireless communication device is coupled to the wave antenna to provide wireless communication with other communication devices, such as an interrogation reader. The wireless communication device and wave antenna may be placed on objects, goods, or other articles of manufacture that are subject to forces such that the wave antenna may be stretched or compressed during the manufacture and/or use of such object, good or article of manufacture. The wave antenna, because of its bent structure, is capable of stretching and compressing more easily than other structures, reducing the wireless communication device's susceptibility to damage or breaks that might render the wireless communication device coupled to the wave antenna unable to properly communicate information wirelessly.

Abstract: An E-field probe comprises one or more dipoles, each comprising plural, parallel, strings of discrete resistors mounted on a section of printed circuit board and connected electrically so that the parallel strings are twisted about each other for optimum orientation symmetry and minimum stray field pick-up. The values of the individual resistors are chosen so that the dipole is essentially a tapered resistance dipole, providing good performance over a very broad range of frequencies. A pair of diodes connected respectively in parallel strings of one arm of the dipole allows the feeder to be constituted by a pair of parallel series of resistors of comparatively high resistance value continuing from the outer end of the arm in which the diodes are situated. The dipole is effectively “end fed” rather then center fed, and pattern distortion and axial asymmetry are minimized.

Abstract: The invention provides for the reception of a L-band signals and MF-band signals using a single antenna element by employing an L-band antenna in conjunction with a connection cable that acts to receive MF-band signals, the invention further providing for the isolation of the L-band signals from an MF-band processing path and isolating the MF-band signals from an L-band processing path.

Abstract: A dipole antenna for selecting an antenna polarization plane of the strongest polarization energy includes at least two dipole antenna elements (1, 2) arranged perpendicularly to each other to form a single antenna, a PCB (3), and two feeding lines (4). Each dipole antenna element includes two T-shaped dipole arms (11, 12). This structure makes use of two planes of the XZ-plane, XY-plane and YZ-plane, and also makes the dipole antenna more compact. The antenna obtains optimum polarization energy by selecting the strongest energy plane. This achieves maximized radiation efficiency under any particular orientation of the dipole antenna. The strongest energy plane is selected by controlled switching, by means of dual-fed signal mode. The dipole arms of each dipole antenna element are disposed on opposite surfaces (31, 32) of the PCB, to minimize interference.

Abstract: The present invention provides an antenna device comprising a conductive substrate and an antenna element located in the proximity of the conductive substrate, in which a portion of the antenna element is formed of a coil or zigzag conductor and an end of the antenna element is connected to the conductive substrate for grounding. In addition, the coil or zigzag conductor is formed at an end of the antenna element and the coil or zigzag conductor and the other end of the antenna element are connected together on an insulator provided on the conductive substrate.

Abstract: An antenna for a radio communications apparatus operates in the frequency range of 800 MHz-3 GHz. The antenna has two radiating elements. The first radiating element is a slot in a substantially planar foil or disc-shaped metallic conductor. The second radiating element has a resonance frequency which is different from that of the first radiating element. The metallic conductor is placed close to a second conductor in the form of a metallic surface. The second radiating element is formed from an edge portion of the first conductor or a gap between the first and the second conductors. Capacitance devices may be disposed between the edge portion and the second conductor.

Abstract: A multiband antenna operates in at least a first frequency band and a second frequency band, a higher frequency band. A dipole has a first conductive leg and a second conductive leg and may be directly fed between the first and second legs. At least a portion of the first leg of the dipole has a meander configuration. The first leg has an electrical length of about one-quarter wavelength, or an odd multiple thereof, in the first frequency band and the second leg has an electrical length of about one-quarter wavelength, or an odd multiple thereof, or more in the first frequency band. A non-driven parasitically-excited conductive element is closely spaced to the first dipole leg and is electrically connected to the second dipole leg. The parasitic element has an electrical length of about one-quarter wavelength, or an odd multiple thereof, in the second frequency band.

Abstract: An antenna device includes radiation elements formed on a common antenna board, a feeding unit for feeding the radiation elements, and a ground plate provided in electrically-spaced relation to the radiation elements. The ground plate is mounted on a box-like metal body to form a short-circuit therewith. The radiation elements may have different line lengths for transmitting and receiving a plurality of wavelengths. The feeding unit may include a first radiation element having a different electrical length than a second radiation element, a first feed point for feeding electric power to the first radiation element, and a second feed point for feeding radiation elements are grounded to the ground plate at respective first and second ground points. The difference from the first and second feed points to their respective ground points are different from one another.

Abstract: A vehicle sun visor, provided with a radio absorptive conductor acting as a radio antenna, is disclosed. The vehicle sun visor, having a panel shape, is installed on the front portion of the interior ceiling within the passenger compartment of a car. The radio absorptive conductor, acting as a radio antenna, is installed on one surface of the sun visor while forming an arrangement suitable for effectively receiving radio waves. The above conductor is also electrically connected to the antenna terminal of an onboard radio system of the car. An input radio wave amplifying unit is mounted on the electric path between the conductor and the antenna terminal of the radio system. The above unit is used for filtering, amplifying and buffering the radio waves received by the conductor. In the present invention, the conductor may be formed by cutting a conductive thin plate into a desirably arranged line through a pressing process.

Abstract: The present invention provides an auxiliary or side lobe cancelling antenna particularly for horizontally polarised main antennas. The auxiliary antenna arrangement for cancelling side lobe interference from a main antenna comprises a ground plane shaped in a concertina or zig-zag fashion. Dipole pairs are spaced from and arranged perpendicular to the front bends, the dipoles having ends angled towards corresponding ground plane sections. The dipoles are connected anti-phase to provide a radiation pattern approximating an ideal auxiliary antenna mask of the main antennas pattern.

Abstract: A first fractal antenna of iteration N.gtoreq.2 in free space exhibits characteristics including at least one resonant frequency and bandwidth. Spacing-apart the first fractal conductive element from a conductive element by a distance .DELTA., non-planarly or otherwise, preferably .ltoreq.0.05.lambda. for non-planar separation for frequencies of interest decreases resonant frequency and/or introduces new resonant frequencies, widens the bandwidth, or both, for the resultant antenna system. The conductive element may itself be a fractal antenna, which if rotated relative to the first fractal antenna will alter or tune at least one characteristic of the antenna system. Forming a cut anywhere in the first fractal antenna causes new and different resonant nodes to appear. The antenna system may be tuned by cutting-off a portion of the first fractal antenna, typically increasing resonant frequency.

Abstract: An antenna of the long frame-type wherein the ratio between the long side and the short side is between 1:4 and 1:8 and the length of the long side is equivalent to one wavelength of the central frequency. One pair of short bars are deployed so that they are located at a distance corresponding to 1/4th to 1/40th of the distance from both end parts of the entire long side length of each long side element. The two end portions of the long side of the antenna is symmetrically bent with respect to a central portion such that the two end portions form an angle of 45 to 90 degrees with respect to the central portion and are parallel to each other.

Abstract: A low profile bi-directional antenna is provided for mounting directly to a metal structure, or some other conductive or semi-conductive surface. The antenna includes an insulating antenna tray, a conductive ground plane mounted to a surface of the antenna tray, first and second radiating elements extending from the ground plane, and a radome covering the radiating elements and fastened to the insulating antenna tray. First and second reflector elements are mounted to the surface of the antenna tray on the lateral sides of the ground plane. The reflectors are electrically connected to the ground plane. The radiating elements are supported above and to the lateral sides of the ground plane and reflector elements by support members mounted at acute angles to the ground plane. An RF connector is provided for coupling RF signals to and from the first and second radiating elements.

Abstract: The invention comprises an antenna structure particularly suitable for mobile stations operating on two frequency ranges. As a supporting component and also as component determining the electrical characteristics the antenna includes a dielectric plate (21). On one surface of the dielectric plate there is a radiating element (22) with a meander form, and on the opposite support of the dielectric plate there is a planar radiating element (23). The operation on two frequency ranges is based on the fact that the structure has two resonance frequencies, which are relatively far from each other. The strips are further relatively wide, due to which the antenna operates satisfactorily in different positions and in the vicinity of objects. The parasitic element can further have a gap operating as a separate radiator, whereby the antenna operates on three frequency ranges.

Abstract: A flat strip-like radiator is angled along the width of the strip to form radiating arms of predetermined length and angles to radiate a design radiation patter. The flat strip is secured to a ground plane such that the flat strip is perpendicular to the ground plane.

Abstract: This antenna has two sets of conductors. Each set is two coplanar triangles with a corner from each triangle at the center and with the two triangle sides opposite those corners being positioned parallel to each other. The planes of the two sets are perpendicular to each other, with the junction of the two planes being close to the imaginary lines through the centers of the parallel sides and the centers of the sets. If the two structures were fed so that the currents in corresponding parts were equal in amplitude and different in phase by 90 degrees, a horizontally polarized omnidirectional radiation pattern would be obtained. Such an omnidirectional antenna would have more gain than a turnstile array of half-wave dipoles with less wind resistance than a Masters super turnstile antenna.

Abstract: An RF data communications device antenna system is shown that includes a dipole and an electromagnetic coupler that provides coupling between each dipole arm to establish a desired resonant bandwidth. An LC matching circuit is provided for matching the dipole to the impedance of the RF data communications device and for transforming the RF signal between the dipole arms of the antenna system.

Abstract: A skewed Log Periodic Dipole Array (LPDA) used as the element in a linear or planar array, serves to remove the element spacing restriction and hence eliminates the grating lobe problem. The skewed form of the device has all dipoles greater in length than the shortest one, i.e. the highest frequency one, skewed such that they are "Z" shaped. When the angle between the end and center segments of the Z dipole is 90 degrees, the skewed LPDA has a constant width equal to the length of the highest frequency dipole.