Abstract: A composite antenna achieves favorable radiation characteristics and favorable communication performance, and can be used in short distance communication as well as long distance communication. The composite antenna includes a dipole antenna having an elongated shape, a loop antenna including at least one pair of opposing end portions, and a connection portion arranged to connect the dipole antenna and a point of the loop antenna at which the amplitude of a current flowing in the loop antenna has a maximum value. The dipole antenna performs long distance communication utilizing an electric field, and the loop antenna performs short distance communication utilizing a magnetic field. This composite antenna may be used as a wireless IC device in RFID systems.

Abstract: Provided is an isolation antenna for a repeater which can acquire high isolation by using loop and dipole antennas, which are positioned in opposite directions to each other based on a shielding means, in a unidirectional repeater generally used in broadcasting or wireless communications even though transmitting antenna/receiving antennas having a co-channel are set up closely to each other. The transmitting/receiving isolation antenna includes: a shielding means including an electric conductor; a first antenna of a dipole antenna type in one side of the shielding means; and a second antenna of a loop antenna type in an opposite side of the shielding means where the first antenna is positioned.

Abstract: Disclosed is an antenna comprising a loop element (10) and an Electric-field radiator (30), wherein the E-field radiator is electrically coupled to the loop element such that at the frequency of operation, there is a substantially 90 degree phase difference between the Electric and Magnetic fields produced by the antenna.

Abstract: The present invention relates to planar compound field antennas. Improvements relate particularly, but not exclusively, to compound loop antennas having coplanar electric field radiators and magnetic loops with electric fields orthogonal to magnetic fields that achieve performance benefits in higher bandwidth (lower Q), greater radiation intensity/power/gain, and greater efficiency.

Abstract: A radio frequency identification (RFID) antenna exhibiting a multiple resonance is disclosed. In one exemplary embodiment, a dipole antenna and a loop antenna are disposed upon a substrate and have dimensions and orientation to exhibit the multiple resonance. The dipole antenna may exhibit a first dipole section having a first length and second dipole section having a second length. The loop antenna may be disposed in a region of the dipole antenna. The ratio of the perimeter of the loop antenna to the sum of the lengths of the dipole sections may be selected to exhibit the multiple resonance.

Abstract: A system and method for enabling secure short-range communication. A close proximity transmitter is used that is designed with a relatively poor radiator as compared to a conventional transmitter supporting conventional transmissions such as mobile phone communications, Wi-Fi, or Bluetooth communication. The close-proximity transmitter and the conventional transmitter are selectively activated based on a communication mode.

Abstract: Wireless repeaters comprising antennae having high electrical isolation are presented. Multi-band antennae are placed on opposing sides of a conductive ground plane to achieve high electrical isolation, preferably higher than 30 dB. The antennae are preferably placed at a distanced from the ground plane that is less than 0.5 wavelengths of a frequency associated with frequency bands to which the antennae are responsive. The presented antennae system reduces the minimum amount of isolation required for stable operation.

Abstract: A mobile wireless communications device may include a portable housing, and a printed circuit board (PCB) carried by the housing and having opposing upper and lower portions. The device may also include at least one wireless transceiver carried by the portable housing, and a satellite positioning signal receiver carried by the portable housing. An antenna assembly may be carried adjacent the upper portion of the PCB. The antenna assembly may include a horizontal conductor extending along the upper portion of the PCB in spaced relation therefrom. The horizontal conductor may be coupled to the satellite positioning receiver. The antenna assembly may also include a loop conductor extending from the horizontal conductor toward the lower portion of the PCB and in spaced relation from the PCB. The loop conductor may be coupled to the wireless transceiver.

Abstract: An antenna for a mobile terminal includes a substrate, a dipole placed on the substrate, a loop placed on the substrate, and a matching circuit on the substrate. The matching circuit comprises at least one of a variable capacitor or a variable inductor. The radiation center of the loop substantially coincides with the radiation center of the dipole.

Abstract: The present invention provides an antenna apparatus for a wireless unit, the antenna apparatus exhibiting a reduced specific absorption rate (SAR) without an additional component for reducing the SAR, which is the amount of energy of an electromagnetic wave absorbed by a human body.

Abstract: A multiband antenna includes a first radio unit closed loop and a second radio unit connected to the first radio unit and symmetrical structure. When the multiband antenna functions, the first radio unit functions as a balanced loop antenna, and the second radio unit functions as a dipole antenna.

Abstract: The present invention antenna preserves the general size and form factor of the prior art loop antennas while providing the benefits of multiple point feeds at less than one wavelength in separation of feed points. The invention antenna obtains omnidirectional radiation and improved efficiency over the prior art by way of dual slotted, open ended cylindrical or rectangular box structures fed with high impedance feed lines.

Abstract: An antenna apparatus includes: a ground substrate; and a loop antenna having first and second polarized wave surfaces, which are perpendicular to the substrate. The substrate provides an antenna, which is excited and vibrated together with the loop antenna. The antenna has a first polarized wave component in parallel to the first polarized wave surface and a second polarized wave component in parallel to the second polarized wave surface. A polarized wave ratio between the first polarized wave component and the second polarized wave component in the substrate is substantially equal to a polarized wave ratio between the first polarized wave surface and the second polarized wave surface in the loop antenna.

Abstract: An object of the invention is to provide an antenna apparatus whose directional characteristic can be switched 90 degrees conforming to the communication mode at the same time as the frequency band can be switched in response to the communication mode for application to a multiband radio for covering different communication modes such as voice communications and data communications, and a radio using the antenna apparatus. An antenna apparatus 1 of the invention includes linear radiator 2, 3; a first linear director 4; and first and second linear conductors 5 and 6 connected at one end to the radiator 2, 3and at an opposite end to the first director 4 through switches 7.

Abstract: A broadband antenna structure (10) for a transponder of a radio frequency identification system comprises—a loop resonator (12) with a feedpoint (14) for connecting with an electronic circuit (16), and—a dipole resonator (18) electrically connected to the loop resonator (12) and comprising two electrically isolated legs (20, 22).

Abstract: The present disclosure pertains to a transponder device (10) having an antenna arrangement and a chip (13) disposed on an antenna substrate (11), wherein the antenna arrangement comprises at least a first antenna unit formed as a loop antenna (16) that is connected electrically conductively to contact surfaces (14, 15) of the chip via conductor ends of an antenna conductor (17) that is used for the formation of the loop antenna, and wherein the antenna arrangement besides the first antenna unit comprises at least one further antenna unit formed as a dipole antenna (19).

Abstract: Provided is a transmitting/receiving isolation antenna that can perform wireless bi-directional communication in the co-channel, co-polarization and co-time by acquiring high isolation from transmitting and receiving antennas having co-time, co-channel and co-polarization and set up adjacently. The isolation antenna includes a first antenna; second and third antennas symmetrically positioned in the same distance from the first antenna; a shielding unit symmetrically positioned between the first and second antennas, and between the first and third antennas; and a signal removing unit for removing a signal transmitted from the first antenna to the second and third antennas.

Abstract: A small ultra wideband (UWB) antenna designed to have a unidirectional radiation pattern is disclosed. The UWB antenna includes a substrate; a power feeding part, provided on an upper surface of the substrate, for receiving a supply of an external electromagnetic energy; a dipole radiator excited by the electromagnetic energy fed through the power feeding part and radiating electromagnetic waves in one and the other directions of the substrate; and an active loop radiator excited by the electromagnetic energy fed through the power feeding part, respectively enhancing and canceling the electromagnetic fields produced in one or the other directions of the substrate by the dipole radiator.

Abstract: A communications device, e.g., a mobile wireless terminal, includes a plurality of antennas having different associated polarization directions. The plurality of antennas includes an electrical antenna, e.g., a dipole antenna and a magnetic antenna, e.g., a loop antenna or a slot antenna. In one embodiment the electrical antenna is used for receiving and/or transmitting signals associated with a vertical polarization direction, while the magnetic antenna is used for receiving and/or transmitting signals associated with a horizontal polarization direction in some embodiments different data streams are communicated concurrently via the electrical and magnetic antennas. Methods for operating the communications device to switch between the electrical and magnetic antennas and/or to control reception and/or transmission are described.

Abstract: Provided is an isolation antenna for a repeater which can acquire high isolation by using loop and dipole antennas, which are positioned in opposite directions to each other based on a shielding means, in a unidirectional repeater generally used in broadcasting or wireless communications even though transmitting antenna/receiving antennas having a co-channel are set up closely to each other. The transmitting/receiving isolation antenna includes: a shielding means including an electric conductor; a first antenna of a dipole antenna type in one side of the shielding means; and a second antenna of a loop antenna type in an opposite side of the shielding means where the first antenna is positioned.

Abstract: There is provided with an antenna device including: a dipole element that includes a first linear element and a second linear element with each one end thereof being provided closely; a loop-shaped element that includes a third linear element and a fourth linear element provided approximately in parallel to the first linear element and the second linear element with each one end thereof being provided closely, and a fifth linear element with one end thereof being connected to the other end of the third linear element and the other end thereof being connected to the other end of the fourth linear element; and a feeding point feeding power to each one ends of the first linear element and the second linear element and to each one ends of the third linear element and the fourth linear element.

Abstract: The present invention relates to an antenna arrangement comprising a constant current electrical loop, which is arranged to provide a first essentially toroid-shaped radiation pattern, where the antenna arrangement further comprises a first and a second electrical dipole. The electrical dipoles are arranged essentially orthogonal to each other, and are arranged to provide a second and third essentially toroid-shaped radiation pattern which each is essentially orthogonal to the other and to the first essentially toroid-shaped radiation pattern. The constant current electrical loop comprises at least two current path parts, where a current can be applied to each one of the parts, so that the current in each one of the parts essentially will be in phase with each other.

Abstract: The present planar antenna include: a linear antenna element to which electric power is to be supplied and a loop-shaped parasitic antenna element placed in the vicinity of said linear antenna element, which are provided on one side of a dielectric substrate. This simple arrangement makes it possible to provide a planar antenna with good circular polarization characteristics.

Abstract: In a portable radio communication apparatus including a housing, at least one part of the housing is formed as a housing electrical conductor portion by an electrically conductive material. The housing electrical conductor portion is connected with a radio communication circuit of the portable radio communication apparatus so as to operate as at least one part of an unbalanced type antenna of the radio communication circuit. Further, the portable radio communication apparatus further includes a boom portion coupled with the housing at least at two positions so as to provide at least one penetrating hole between the housing and the boom portion.

Abstract: A broadband antenna structure (10) for a transponder of a radio frequency identification system comprises —a loop resonator (12) with a feedpoint (14) for connecting with an electronic circuit (16), and —a dipole resonator (18) electrically connected to the loop resonator (12) and comprising two electrically isolated legs (20, 22).

Abstract: A vehicle traffic sensor for detecting and monitoring vehicular targets is presented. The sensor employs a planar design resulting in a reduced profile sensor. The sensor includes a multi-layer radio frequency board with RF components on one of the sides and both isolation and planar array antennas on the opposing side. The antennas are preferably tapered planar array antennas which include one transmit antenna and one receive antenna. The sensor also includes at least one logic or signal processing board populated with components on a first side and a ground plane on a second side positioned toward the RF componentry of the RF board to form an RF shield. The boards are housed within a housing that is permeable, at least on the side through which the antenna structures propagate.

Abstract: The RFID tag of the present invention includes the tag antenna, and the LSI chip being connected in parallel with the tag antenna. The tag antenna includes a feeder terminal to which the LSI chip is connected, a loop antenna connected to the feeder terminal, and a bypass conductive line bypassing the loop of the loop antenna. Further, the line width of the bypass conductive line is structured thicker than the line width of the loop antenna.

Abstract: An antenna arrangement that includes two or more electrically coupled antenna elements is described. Each of the antenna elements has different operational characteristics than the other antenna elements. The antenna elements are arranged to resonate generally about a first operational frequency to widen the operational bandwidth of the antenna arrangement.

Abstract: A system and method for securing a Radio Frequency (RF) transaction using a Radio Frequency Identification (RFID) transaction device are provided. A random number is transmitted from an RFID reader to an RFID transaction device, an RFID transaction device authentication tag is created in the RFID transaction device, using at least the random number, a routing number associated with a transaction account, and a stored counter value. The RFID transaction device authentication tag is transmitted to the RFID reader, the stored counter value in the RFID transaction device is incremented, and a transaction request for verification, which comprises the RFID transaction device authentication tag and the stored counter value, is transmitted and processed. Either the RFID transaction device authentication tag or the stored counter value, or both, are verified.

Abstract: A multi band antenna system (100) and a wireless communication device are disclosed. The multi band antenna system provides coverage over multiple frequency bands. The multi band antenna system comprises a ground surface, a first conductor (102), a second conductor (104), a common feed conductor (106) coupled to the first conductor and the second conductor, and a ground conductor (108) coupled to the first conductor and the second conductor. The first conductor has a first physical length operationally equal to a half wavelength in a first RF band and operationally equal to a full wavelength in a second RF band. The second conductor has a second physical length operationally equal to a half wavelength in a third RF band.

Abstract: In a portable radio communication apparatus including a housing, at least one part of the housing is formed as a housing electrical conductor portion by an electrically conductive material. The housing electrical conductor portion is connected with a radio communication circuit of the portable radio communication apparatus so as to operate as at least one part of an unbalanced type antenna of the radio communication circuit. Further, the portable radio communication apparatus further includes a boom portion coupled with the housing at least at two positions so as to provide at least one penetrating hole between the housing and the boom portion.

Abstract: A broadband antenna including both electric and magnetic dipole radiators is provided herein. The broadband antenna may be referred to as a “P×M antenna” and may include a pair of magnetic loop elements, each having multiple feed points symmetrically spaced around the loop element. The broadband antenna may also include an electric dipole element arranged between the pair of magnetic loop elements. In general, the electric dipole element and the magnetic loop elements may be coupled together through a network of transmission lines, as opposed to being incorporated into a single radiative element.

Abstract: A thin and flexible radio frequency (RF) antenna tag or label is disclosed which contains an RF circuit connected to an antenna which is created by demetallizing the area around the antenna pattern on a thin, metallized substrate such as a film or paper web. Antenna(s) may be formed on one or both sides of the substrate and can contain printed, holographic, optical variable device, diffractive, dot matrix, computer-generated holograms or computer-generated optical images. The demetallized RF antenna on the substrate can optionally further be transferred to a second substrate or web by means of a cold foil stamping process. The tag or label is thin and flexible, enabling a wide range of applications including RF tagging of anti-theft devices, product packaging of all types, credit cards, passports, admission tickets, stamps, vehicles, badges, fare cards, roadway tolls, customs and immigration checkpoints identification, and animal identification/tracking devices.

Abstract: An antenna beam controlling system (ABCS) for use in cellular communication systems. The ABCS allows the antenna's horizontal beam direction and horizontal beam width to be remotely adjusted for optimum reception and transmission. The ABCS, in its basic design, is comprised of at least one antenna reflector that incorporates a reflecting disk for receiving and transmitting RF signals, an antenna rotating assembly, and an electronic controller. All the elements of the ABCS are housed within an antenna enclosure, such as a radome, which is maintained in an environmentally shielded condition by a top and bottom cover. The electronic controller is designed to remotely activate the ABCS and to control and optimize the position of the antenna reflector.

Abstract: An antenna is shaped to include a substantially 1-wavelength loop portion and a pair of dipole portions. The loop portion includes vertical portions, which are located opposite to each other in a vertical direction. The dipole portions share part of the loop portion, and are located opposite to each other in a horizontal direction.

Abstract: An antenna system that for use in both high density areas and rural areas while still obtaining acceptable reception in both locations. The antenna system includes a switching mechanism that permits the user to select between a lower gain range, appropriate for high density areas, and a higher gain range, which is more conducive to rural areas where UHF and VHF signals tend to be the weakest. This system provides the user with greater utility and performance and broader compatibility with television markets of varying sizes.

Abstract: An antenna design for radio frequency identification (“RFID”) tags. More particularly, the present invention relates to design for RFID tags particularly operating in the ultra high frequency (“UHF”) operating band.

Abstract: An object of the present invention is to provide a small composite antenna that is capable of operating in a plurality of different frequency bands. A GPS first loop antenna 2 is formed on a dielectric substrate 10. A VICS radio wave beacon second loop antenna 3 is formed on substantially the same axis within the first loop antenna 2. In addition, an ETC patch antenna 4 is formed in the bottom face of a recess 12 provided substantially in the center of the dielectric substrate 10. An earth pattern is formed over the whole of the underside of the dielectric substrate 10. An arc-shaped first feed pattern is electromagnetically coupled to the first loop antenna 2 so as to supply electricity thereto and cause same to operate as a right-handed circularly polarized antenna. An arc-shaped second feed pattern is electromagnetically coupled to the second loop antenna 3 so as to supply electricity thereto.

Abstract: An antenna system includes a VHF dipole antenna having a pair of rod elements disposed substantially in a line, and a UHF Yagi antenna having a radiator and a director disposed on the rod elements.

Abstract: A method of wireless communication is disclosed, in which polarization diversity can be utilized to improve fading performance or to increase the capacity of the communication channel in a scattering environment. Complementary signal information is impressed upon, or derived from, corresponding electric and magnetic polarized field components of a transmitted or intercepted electromagnetic wave. Four, five, or even six independent signal channels can thereby be utilized for communication using a localized antenna arrangement.

Abstract: A reduced size microstrip antenna which receives GPS data and which is adapted for use on small diameter weapons systems such as a missile or smart bomb. The microstrip antenna has a center frequency of 1.575 GHz, a frequency bandwidth of twenty megahertz and provides for right hand circular polarization. The microstrip antenna includes a pair of quarter-wavelength antennas which have a rectangular shape and are rotated ninety degrees from one another, and a copper etched feed network which provides for a signal phase shift of ninety degrees.

Abstract: A compact antenna and a communication unit having the same comprises one or more input feeds and one or more sets of elements. Each set of elements is coupled to one or more of the input feeds, and each set of elements has a property that input signals applied to input feeds coupled to the set of elements causes a directed beam to be emitted. At least one given element of the set or sets of elements has a largest dimension, and a smallest wavelength to be emitted from the antenna is larger than the largest dimension for the given element. The antenna is adapted to simultaneously transmit the input signals, and generally more than two input signals. When a concentration region for a directed beam is large enough, more than one degree of freedom can be contained in the concentration region. Techniques are presented for designing the compact antenna.

Abstract: A wireless module for notebook is disclosed. The wireless module for notebook is combined on a logo area located on a LCD (Liquid Crystal Display) screen housing of notebook computer, wherein the logo area has at least one fixing holes (such as screw holes) used for fixing the wireless module on the notebook computer via at least one screws. Since the wireless module has only about 8 mm in thickness; the wireless module can be matched with the notebook computer smoothly and tightly. The wireless module comprises: at least one penetrating holes penetrating from the upper surface of wireless module to the lower surface thereof, and corresponding to the fixing holes; and a module contact for electrically connecting to a LCD contact point on the LCD screen housing of notebook computer.

Abstract: A satellite antenna with a radiator element arranged between a ring element and a ground plane. The radiator element arranged in a substantially parallel orientation and electrically isolated from the ring element and the ground plane. The antenna elements may be dimensioned for reception of SDAR frequency bands.

Abstract: An active RFID label is provided in which the antenna also forms the battery for the RFID chip that is part of the label. The antenna can be made of one or both of the electrodes forming a thin-film lithium-ion battery. The RFID chip, antenna and battery can all be placed upon the same substrate, and because the antenna and battery are co-located, the substrate can be made relatively flexible.

Abstract: A method of wireless communication is disclosed, in which polarization diversity can be utilized to improve fading performance or to increase the capacity of the communication channel in a scattering environment. Complementary signal information is impressed upon, or derived from, corresponding electric and magnetic polarized field components of a transmitted or intercepted electromagnetic wave. Four, five, or even six independent signal channels can thereby be utilized for communication using a localized antenna arrangement.

Abstract: A balanced antenna system for a communication device includes a balanced transmission line electromagnetically coupled to a transceiver of the device. A symmetrical dipole antenna element is operable at a first frequency driven by the balanced transmission line. A symmetrical loop antenna shares portions of the dipole antenna element and is operable at a second frequency driven by the transmission line. Preferably, the antenna system is disposed within a flip portion of the device housing.

Abstract: Terminal ends at one side of first and second elements 2a, 2b whose length is approximately half the wavelength of radiated radio wave are used as first feeding points #1, #2 and terminal ends at the other side of the individual elements are connected to a loop-shaped element 1 whose perimeter is approximately equal to the wavelength at two oppositely located points of four equally dividing points of the loop-shaped element 1. Terminal ends at one side of third and fourth elements 2c, 2d whose length is approximately half the wavelength of the radiated radio wave are used as second feeding points #3, #4 and terminal ends at the other side of the individual elements are connected to the remaining two oppositely located points. Electric power is fed into the first and second feeding points with a phase difference of 90°.

Abstract: A method of wireless communication is disclosed, in which polarization diversity can be utilized to improve fading performance or to increase the capacity of the communication channel in a scattering environment. Complementary signal information is impressed upon, or derived from, corresponding electric and magnetic polarized field components of a transmitted or intercepted electromagnetic wave. Four, five, or even six independent signal channels can thereby be utilized for communication using a localized antenna arrangement.

Abstract: An electrically small radiator structure for radiating electromagnetic waves having an electrical size, k*a, with a value less than &pgr;/2 and above &pgr;/20,000 and configured to have at least a first and second magnetic, or electric, dipole element. Dipole elements are preferably oriented such that a source-associated standing energy value for the structure, or Wds(tR), is low, Radiative Q value preferably less than ⅓(k*a)3; and each of the elements, whether paired with respective electric dipole elements, is in electrical communication through a feed circuit to at least one power source. Further, a first dipole pair (or element) oriented orthogonally with respect to a second pair (or element) are in voltage phase-quadrature; the structure is operational at a frequency below 5 GHz; and dipole moments oriented such that the following is generally satisfied: a divergence of the Poynting vector of the pairs with respect to retarded time, namely ∇|tR·N, has a value less than 1.0.