Abstract: A collapsible interior antenna has a main antenna, two wing antenna assemblies and a secondary antenna. The main antenna is rectangular and has two opposite connecting edges. The wing antenna assemblies are pivotally mounted respectively on the connecting edges and connected transmittably to the main antenna. The secondary antenna is a telescopic antenna, receives signals having a different frequency band to the main antenna and is electrically mounted on the main antenna. A person can minimize a footprint of the collapsible interior antenna by retracting the secondary antenna and folding the wing antenna assemblies toward the main antenna. When in use, the wing antenna assemblies can be unfolded to receive signals from different directions.

Abstract: A receiver (30) with an antenna circuit is disclosed, which antenna circuit comprises a coil (31) and either a monopole (35) or a dipole connected to the coil (31). The antenna circuit captures a signal with a wavelength transmitted by a transmitter (1). The coil (31) captures the signal and generates therefrom a current having a frequency corresponding to the wavelength. The coil (31) is dimensioned such that the current is distributed uniformly within the coil (31) at each point in time. Preferably, the monopole (35) or a leg of the dipole has a length corresponding to less than 5% of the wavelength. The invention further relates to a radio transmitter of the same kind. Finally, the invention relates to an RFID tag, a smart card, a mobile device, and a hearing aid, each comprising an inventive receiver (30) and/or an inventive transmitter.

Abstract: A reduced height log periodic antenna that may safely be positioned under the rotating blades of a helicopter sitting on the ground and still resonate in the frequency range at which the antenna was originally designed to resonate. The antenna comprises a pair of antenna booms, a first plurality of vertical antenna radiating elements connected to the booms, and a second plurality of vertical antenna radiating elements connected to the booms. In addition, the antenna includes a plurality of tuned horizontal antenna radiating elements, each tuned horizontal radiating element being connected to the top of one of the second plurality of vertical antenna radiating elements, and a plurality of tuned upwardly bent horizontal antenna radiating elements, each tuned upwardly bent horizontal antenna radiating element being connected to the bottom of one of the second plurality of vertical antenna radiating elements.

Abstract: The present invention seeks to provide a multiple monopole antenna including a looped conductor having at least two conductive arms extending therefrom and a common feed point located on the looped conductor.

Abstract: A multiband planar antenna intended for small-sized radio devices and a radio device. The basic structure of the antenna is a two-resonance P1FA, the radiating plane (320) of which has a structural part (321) corresponding to the lowest operating band and a structural part (322) corresponding to the upper operating band. In addition, a loop resonator (323) operating as a radiator is formed in the radiating plane. The ground conductor (325) of the feed line of the loop is at the same time the short-circuit conductor of the PIFA. The second conductor (326) of the feed line is connected to the opposite end of the loop, and it operates as the feed conductor of the PIFA. At the same time the structural part (321) of the radiating plane that corresponds to the lowest operating band is located between the loop and the structural part of the PIFA that corresponds to the upper operating band, in order to reduce interference between them.

Abstract: A composite antenna device comprising a plurality of antennas, the plurality of antennas having at least one particular antenna which differs in antenna characteristics, and at least either the particular antenna or at least one other antenna being of subassembly configuration.

Abstract: An antenna formed with a number of notch antennas forming an sectional inner ring and a sectional outer ring. Each of the notch antennas having a pair of leaves with a throat end proximate the inner ring and a leaf tip end proximate the outer ring, wherein the leaves are separated by a notch area. There is a lagoon interiorly disposed about the inner ring. At least one feed is coupled to at least one throat end. A lower horizontal loop couples each leaf tip and forms the outer ring. In addition, a plurality of slots separates each of the notch antennas.

Abstract: The antenna includes a base and a plurality of antenna feeds carried by the base for respective different rotational polarizations. A plurality of inner elongate convex coupler elements are carried by the base and connected to respective ones of the antenna feeds for respective different rotational polarizations, and a plurality of outer elongate convex resonant elements are carried by the base and extend outwardly therefrom a distance greater than the plurality of inner elongate convex coupler elements. The plurality of outer elongate convex resonant elements may be tuned to different resonant frequencies to thereby support the different rotational polarizations. Thus, a small circularly polarized antenna with a hemispherical pattern for high frequency (HF) or satellite applications is achieved.

Abstract: A radio transmitting or receiving antenna which is physically compact being typically no more than three percent of a wavelength in any dimension. The antenna comprises two electrical conducting surfaces (2) and (4) across which radio frequency electric field lines carrying half the power are arranged to cross radio frequency magnetic field lines carrying the remaining half power to thereby synthesize and propagate radio waves. The low impedance coaxial feeder (1) from the transmitter flows through a set of coils (3A) to (3D) wired in parallel and lying in a toroidal shape to create a circular RF magnetic field H and then enters a low impedance tap on a resonant autotransformer used to connect a high RF voltage and create a curving electromagnetic field E across the interaction zone in the volume between the upper metal cylinder (4) and the ground plane (1).

Abstract: Inductively coupled antennas and methods of designing the same are disclosed. Electrically small antennas having relatively high efficiency and relatively broad bandwidth may be formed by inductively coupling an antenna loop to at least one antenna winding. Such antennas may be substantially planar. Various operating characteristics of such antennas may be adjustable by and/or dependent upon the strength of the inductive coupling between an antenna winding and an antenna loop.

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: A patch antenna for a first frequency is disposed on a first face of a dielectric substrate, and has a first size. A coil antenna for a second frequency is disposed on the first face of the dielectric substrate so as to surround the patch antenna, and has a second size which is larger than the first size. A ground member is disposed on a second face of the dielectric substrate, and has a third size which is larger than the first size and smaller than the second size.

Abstract: The present invention relates to a wireless communication device, such as a transponder, that has a plurality of antennas for multi-frequency usage. The wireless communication device comprises a control system, communication electronics, memory, and the aforementioned antennas. A wireless communication device having a pole antenna may be used with one or more loop conductor antennas to achieve the desired operating frequencies. A wireless communication device having a dipole antenna may be coupled across a loop conductor antenna to provide different loop conductor configurations depending on the frequency.

Abstract: A remote access device which may comprise an antenna having a first inductor with a first axis, a second inductor with a second axis, and a third inductor with a third axis, where the first, second and third axes may be oriented substantially perpendicular to each other, respectively, such that the first inductor generates a first magnetic field associated with a first plane, the second inductor generates a second magnetic field associated with a second plane different than the first plane, and the third inductor generates a third magnetic field associated with a third plane different than the first and second planes. The remote access device preferably includes a single form for the first, second and third inductors, where the first, second and third inductors are each wound on the form.

Abstract: A dual band antenna system that combines into a single integrated device an H-field shielded loop antenna and an E-field antenna. The system includes an unshielded section bounded on each end by first and second shielded sections, respectively. Input frequency filters are electrically connected to the first shielded section to selectively pass one of a first radio frequency signal or a second radio frequency signal through the first shielded section. Output frequency filters electrically connected to the unshielded section for switching between two paths of transmission and associated modes of operation: (i) a first mode (operating as an H-field antenna) in which an H-field transmission pattern is generated in the first and second shielded sections; and (ii) a second mode (operating as an E-field antenna) wherein an E-field is radiated via the E-field antenna.

Abstract: An internal antenna for wireless devices comprising a ground plane and a planar loop antenna. The shorted loop antenna is provided with a gap and operates at a quarter wavelength. The compact single feed dual or multi band internal antenna is realized either through composite assembly of an active outer and inner radiating elements or by a selective combination of an active outer radiating element and a parasitic inner radiating element. The inner radiating element of the proposed invention is completely encompassed within the outer radiating element. The resonant tuning of the internal antenna is accomplished by means of the matching stub and capacitive loading plates with the matching stubs being entirely internal to the outer radiating element.

Abstract: An electromagnetic protection antenna for mobile transmitter, includes two substantially planar loops (1, 2) symmetrical relative to an electrically insulated intersecting point. A central antenna (5, 6) is arranged inside each of the loops, each central antenna having a shape substantially homothetic with that of the respective loop.

Abstract: Methods of manufacturing an antenna are presented. The antenna is capable of being mounted on a printed circuit board. In accordance with the method, the design dimension of a unitary piece of material are selected according to an operating wavelength. The unitary piece of material is stamped out from a larger section of material according to the design dimensions to form an antenna. The unitary piece of material includes a circular area and a stem area. The circular area has a center and an outer region. The stem area has a first end and a second end. The first end is joined with the outer region. The unitary piece is bendable at the first end and the outer region.

Abstract: A vehicle detector and classifier comprises a plurality of electrically conductive loops 1 arranged substantially in a plane perpendicular to a road surface, for detecting vehicle wheels. The loops can be arranged in a transverse, vertical slot 2 and housed in a flexible enclosure. An electronic circuit 3, including an oscillator, can be positioned adjacent each loop 1 in the slot 2 to energize and monitor the loop. The detector preferably also includes a conventional loop arranged substantially in the plane of the road surface, for detecting vehicle bodies, and means for superposing the results obtained from the conventional and vertical loops to aid in classifying detected vehicles.

Abstract: A dual frequency antenna providing nulling of adjacent radio signals. The antenna is formed on a single substrate of dielectric material and features a first antenna for a first frequency on top surface of the substrate mutually coupled to a second antenna formed for reception of a second frequency on the bottom surface of the substrate. A single antenna feed communicates through the substrate with the first antenna communicates both received frequencies to an attached device. Feeding the single antenna feed through the substrate wall inside the interior of both antenna perimeters provides for an unobstructed view above the first antenna. The nulled portion of the reception pattern may be steered by tilting the antenna.

Abstract: Manufacturing techniques are described for forming electrical components. For example, a layer of a metal powder composition is deposited onto at least a portion of a substrate. Pressure is applied to the metal powder composition by hydraulic press that has one or more projections in order to capture a pattern on the substrate. The metal powder composition compressed by the projections of the hydraulic press adhere to the substrate to form the captured pattern. The metal powder composition in regions not compressed by the projections of hydraulic press do not adhere to the substrate and may be removed. The metal powder composition may be compressed to form electrical components, such as antennae, capacitor plates, conduction pads and the like, for use in an electronic surveillance system (EAS), a radio frequency identification (RFID) system, or the like.

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: A disk-shaped two-antenna assembly contains a CP ring-antenna and a linear-monopole-antenna. The bottom surface of a ring-shaped dielectric member holds a ground plane. A circular radiating element is located on a top surface of the ring-shaped dielectric member. A linear radiating element is positioned coincident with a central axis of the two-antenna assembly, and a top end thereof carries a metal disk that extends perpendicular to the central axis of the two-antenna assembly. A centrally-located void lies between the ground plane and the metal disk to provide for the housing of electronic components. Metal RF shields are electrically connected to the ground plane and are located at the top portion of this void, intermediate the bottom-located ground plane and the top-located metal disk.

Abstract: Manufacturing techniques are described for forming electrical components. For example, a layer of a metal powder composition is deposited onto at least a portion of a substrate. Pressure is applied to the metal powder composition by hydraulic press that has one or more projections in order to capture a pattern on the substrate. The metal powder composition compressed by the projections of the hydraulic press adhere to the substrate to form the captured pattern. The metal powder composition in regions not compressed by the projections of hydraulic press do not adhere to the substrate and may be removed. The metal powder composition may be compressed to form electrical components, such as antennae, capacitor plates, conduction pads and the like, for use in an electronic surveillance system (EAS), a radio frequency identification (RFID) system, or the like.

Abstract: Antenna system composed of (N+1) virtually identical radiating structures with N greater than or equal to 1, said (N+1) structures being arranged parallel to each other and each radiating structure being connected to a power supply and impedance matching device. Use for frequency ranges between 1.5 to 30 MHz.

Abstract: A composite antenna apparatus includes a cylindrical member 4 formed by a flexible insulating film rolled into a cylindrical shape, a plurality of antenna patterns 3 formed in a helix pattern on a peripheral surface of the cylindrical member 4, a circuit board 2 fixed to one axial end of the cylindrical member 4 and having a circuit pattern 10 connected to the antenna patterns 3 by soldering, and a monopole antenna 1 disposed inside the cylindrical member 4 and standing up on one surface of the circuit board 2. The circuit board 2 is provided with a first metallic pattern 8 having a predetermined area and formed on the one surface of the circuit board 2 at a position inside the cylindrical member 4.

Abstract: A communication station for contactless communication with suitably formed data carriers has an antenna configuration which has at least one antenna with at least one pole and at least one antenna with at least one essentially closed loop, and where the antenna with at least one pole is loosely electromagnetically coupled with the antenna with at least one essentially closed loop.

Abstract: A built-in multi-band mobile phone antenna assembly includes apatch antenna, a loop antenna disposed adjacent to the patch antenna, and a parasitic element disposed adjacent to both the patch antenna and the loop antenna and coupled parasitically to the patch antenna.

Abstract: Methods of manufacturing an antenna are presented. The antenna is capable of being mounted on a printed circuit board. In accordance with the method, the design dimension of a unitary piece of material are selected according to an operating wavelength. The unitary piece of material is stamped out from a larger section of material according to the design dimensions to form an antenna. The unitary piece of material includes a circular area and a stem area. The circular area has a center and an outer region. The stem area has a first end and a second end. The first end is joined with the center. The unitary piece is bendable at the first end and the center.

Abstract: An object of the present invention is a small composite antenna that is capable of operating in a plurality of different frequency bands. A first antenna 2 constituting a GPS circularly polarized loop antenna is formed on a dielectric substrate 10. A second antenna 3 constituting an ETC square patch antenna is formed on substantially the same axis as the first antenna 2. An earth pattern is formed in the underside of the dielectric substrate 10, and a recess in whose bottom face an earth pattern is formed so as to lie opposite the second antenna 3 is provided. An arc-shaped feed pattern 4 is electromagnetically coupled to the first antenna 2 so as to supply electricity thereto, whereby this antenna is made to operate as a right-handed circularly polarized antenna. Electricity is supplied by a coaxial cable to the second antenna 3 to cause same to operate as a right-handed circularly polarized antenna.

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: Electronic key reader includes a protective metal housing member having a front surface with a center and edges. At least one slot extends from at least one of the edges to the center of the front surface.

Abstract: A disk-shaped two-antenna assembly contains a CP ring-antenna and a linear-monopole-antenna. The bottom surface of a ring-shaped dielectric member holds a ground plane. A circular radiating element is located on a top surface of the ring-shaped dielectric member. A linear radiating element is positioned coincident with a central axis of the two-antenna assembly, and a top end thereof carries a metal disk that extends perpendicular to the central axis of the two-antenna assembly A centrally-located void lies between the ground plane and the metal disk to provide for the housing of electronic components. Metal RF shields are electrically connected to the ground plane and are located at the top portion of this void, intermediate the bottom-located ground plane and the top-located metal disk.

Abstract: An antenna adapted to operate in multiple frequency bands includes a first conductive loop element having a commonly driven electrical connection at both ends. The first conductive element is resonant at a first frequency. An electrical feed point is located at the commonly driven electrical connection of the first conductive element. A second conductive element includes a straight portion and a helical portion. The straight portion being is coupled to the electrical feed point and the helical portion being is located distally from the feed point. The second conductive element being resonant at a second frequency. This commonly driven loop provides for a wider bandwidth and allows for a more compact multi-band antenna.

Abstract: A remote access device which may comprise an antenna having a first inductor with a first axis, a second inductor with a second axis, and a third inductor with a third axis, where the first, second and third axes may be oriented substantially perpendicular to each other, respectively, such that the first inductor generates a first magnetic field associated with a first plane, the second inductor generates a second magnetic field associated with a second plane different than the first plane, and the third inductor generates a third magnetic field associated with a third plane different than the first and second planes. The remote access device preferably includes a single form for the first, second and third inductors, where the first, second and third inductors are each wound on the form.

Abstract: A communication station (1) for contactless communication with suitably formed data carriers (DT1, DT2) has an antenna configuration (7) which has at least one antenna (8) with at least one pole and at least one antenna (13) with at least one essentially closed loop, and where the two antennas (8, 13) are loosely electromagnetically coupled together.

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 apparatus (1) for converting solar energy into electrical energy and for radiating and/or receiving high frequency electromagnetic waves is described. The apparatus (1) includes at least one solar cell (2) provided with electrodes in the form of electrically conducting contacts, wherein at least one of the contacts of the solar cell at the same time forms an antenna element.

Abstract: An antenna structure for a vehicle which includes an antenna which is disposed as a print or sticker antenna on a front window glass (FW) and is used to receive FM and AM waves, has a loop-shaped (e.g., reverse-convex-shaped) antenna element (1) which is disposed near the upper edge portion of the FW, one antenna element (2) which is connected in a DC manner to the lower side portion of the loop shape defined by the antenna element (1), and nearly vertically descends toward the lower edge portion of the FW substantially at its center in the widthwise direction of the vehicle, and a feeder distribution center (P) formed on the upper side portion of the loop shape defined by the antenna element (1), and the antenna elements (1, 2) are formed of silver paste containing dark carbon particles.

Abstract: The antenna (1) includes a first conductor (2) folded in a plurality of loops (3) which at least partly overlap, seen in a first direction (z). As a result, the antenna (1) seen in the first direction (z) is compact and is therefore highly suitable for incorporation in the housing of, for example, a cordless telephone.

Abstract: In antenna device which is to be used in a portable radio receiver, plural loop antennas 1 and 3 which are formed along different faces of a case 9 of the radio receiver, respectively, and switching means 5 for selecting one of received signals from the plural loop antennas are disposed. Reception is performed while selecting a loop antenna having a higher received signal level. When an antenna having the directivity or the plane of polarization which are more advantageous is selected, it is possible to ensure high reception performance.

Abstract: An improved antenna system for a collar-mounted receiver-stimulator unit of an electronic animal training apparatus includes a conductive antenna mounting connector for detachable connection of an external flex antenna to the receiver-stimulator unit, a ferrite core, and a first winding on the ferrite core is coupled to a receiver circuit of the receiver-stimulator unit, and constitutes an internal ferrite antenna thereof. A second winding on the ferrite core is connected to the antenna mounting conductor and coacts with the first winding to function as a matching transformer between a receiver antenna input terminal and an external high flex antenna connected to the antenna mounting connector. The longitudinal axis of the ferrite core is co-planar with a longitudinal axis of the flex antenna.

Abstract: A GPS wave antenna apparatus according to the present invention includes a substrate unit having a printed board on which an antenna constituting element including a GPS wave antenna element is mounted integrally as one component, a case having an opening portion at one end, for detachably receiving the substrate unit through the opening portion, and a conductive plate attached to the case so as to block the opening portion and arranged opposite to the GPS wave antenna element at a fixed distance therebetween. The GPS wave antenna element has a thin-film conductive pattern, and the substrate unit includes a low noise amplifier provided on the printed board and a feeder connected to a feeder section of the antenna element through the low noise amplifier.

Abstract: An improvement is disclosed to an antenna structure that is a pair of coplanar triangular loops with a corner of each triangle at the center and the triangle sides opposite those corners placed parallel to each other to form the outer sides of the structure. The improvement is extra conductors placed between the central point and the center of the outer parallel sides. This improvement not only strengthens the structure, which may be important in the high-frequency spectrum, but it also is convenient for turnstile and log-periodic arrays of such structures.

Abstract: The present invention relates to a radio transceiver having a plurality of switchable antennas. The radio transceiver comprises (1) a housing, (2) a dipole antenna installed on the housing for transmitting and receiving radio signals, (3) at least one patch antenna installed on the housing for transmitting and receiving radio signals, each patch antenna being connected to an antenna switch, (4) an impedance matching circuit connected to the dipole antenna and each said antenna switch, (5) a transceiver circuit connected to the impedance matching circuit for converting radio signals received by the antennas into base band signals and converting base band signals to be transmitted into radio signals, (6) and mode control means for controlling each said antenna switch and the impedance matching circuit to match the impedance of the impedance matching circuit with the connected antennas.

Abstract: An improved loop antenna (10) comprises first (12) and second (16) conductive loops. Each of the first and second conductive loops has a discontinuity (14, 18). The first and second conductive loops (12, 16) are arranged substantially concentrically to form a capacitive coupling such that the tuned frequency of the loop antenna (10) has improved protection from external capacitance effects.

Abstract: An antenna device including a radiating conductor film having two ends adjacent to each other and connecting the two ends in a loop-like shape, formed on an upper face of a dielectric base body in a rectangular parallelepiped shape having the upper face and a lower face in a square shape in parallel with each other, a grounding conductor film extending in a planar shape formed on the lower face of the dielectric base body, and feeding conductor films and respectively connected to the two ends of the radiating conductor film 12. The feeding conductor films extend in the up and down direction in parallel with each other one of which is connected to the grounding conductor film, are formed on a side face of the dielectric base body 11. The antenna device has high directivity and efficiently transmits and receives electromagnetic waves used in communication.

Abstract: An antenna apparatus includes a magnetic-current-type antenna, an electric-field-type antenna, and switch. The magnetic-current-type antenna and the electric-field-type antenna are switched according to use conditions by the switch.

Abstract: A GPS/radio antenna for receiving a GPS satellite signal and a DGPS radio signal. The GPS/radio antenna includes a GPS antenna using a microstrip antenna element for receiving the GPS signal having GPS location determination information, a radio antenna for receiving a DGPS radio signal in the FM broadcast frequency range having DGPS corrections, an enclosure, and a cable. The GPS/radio antenna may be included in a GPS/DGPS receiver system also including a receiver unit with an FM DGPS receiver for demodulating the DGPS radio signal and providing DGPS corrections, and a differential-ready GPS receiver for providing a differentially-corrected GPS location.

Abstract: An energy diversity antenna (100) includes a first antenna (103) and second antenna (113) positioned on a substrate (101). The first antenna is preferably a loop used for receiving radio frequency signals with H-field energy while the second antenna is preferably a monopole used for receiving radio frequency signals with E-field energy. The energy diversity antenna (100) is applicable for use in portable communications devices capable of diversity reception. It is particularly useful in geographic locations where reflections and multipath interference is a problem.