Abstract: The invention relates to an inductive antenna, comprising: a first planar conductive winding (42) on a first surface of a substrate, said first winding being cut off at regular intervals so as to form a series of pairs of first conductors (522, 524; 542, 546; 562, 564); and a second planar conductive winding (44) on a second surface of the substrate, said second winding being provided opposite the first winding and cut off in a direction vertically perpendicular to that of the cutoffs of the first winding so as to form a series of pairs of second conductors (526, 528; 546, 548; 66, 568).

Abstract: A system and method for fabricating a mandrel wound antenna are provided. The method includes securing a first end of a wire to a first portion of a mandrel tool, where the mandrel tool includes a faceplate supporting a plurality of posts, and the posts arranged and disposed to define non-overlapping circumferential patterns. The method also includes wrapping the wire around outer peripheries of the plurality of posts to form non-overlapping wire coils around the plurality of circumferential patterns to provide an antenna. The method further includes securing a second end of the wire to a second portion of the mandrel tool, cutting the wire in proximity to the second end, attaching the antenna to a substrate separate from the faceplate, and detaching the antenna from the faceplate.

Abstract: Logistical passage measurement systems are provided. A representative system includes: an excitation unit having dual loop antennae, with a first loop and a second loop, the two loops located in and parallel to the same plane, and adjacent to one another, and a control box for exciting said antennae, the control box arranged to drive the currents of the two loops, such that the phase difference between the currents of said two loops alternates with time between 0° and 180°, and wherein the amplitude of the currents for each loop is of a first level when the phase difference is 180° and wherein said amplitude is of a second level, lower than the first level, when the phase difference is 0°.

Abstract: A terminal for performing at least one of wired and wireless communication is provided. The terminal includes a first antenna configured to recognize a handwriting through a change of an electromagnetic field and a second antenna for a short range wireless communication, wherein the first antenna and the second antenna are formed on a same Flexible Printed Circuit Board (FPCB).

Abstract: An RFID tag includes a base having at least one fold formed therein. An integrated circuit is formed on the base. At least one antenna segment extends from the integrated circuit and crosses the fold. When the fold is creased, a portion of the antenna segment on one side of the fold is aligned to be orthogonal to a portion of the antenna segment on the other side of the fold.

Abstract: A transmitter/receiver circuit comprises a wireless transmission/reception circuit having a first inductor for generating/detecting a magnetic induction field onto which an output of a radio frequency circuit is modulated and a second inductor in series with the first inductor for generating/detecting an electric induction field onto which the output of the radio frequency circuit is modulated. The second inductor comprises an electrically conductive track which at least partially surrounds a grounded electrically conductive core. The invention thus provides the transmitter and receiver for a communication system using near fields, and in which the input/output of the radio frequency circuitry can be balanced. The first coil produces the main magnetic induction field and the second coil is activated as an antenna producing an electric induction field. By this method, the operating range is increased and the relative positioning between both communication ends is less sensitive.

Abstract: A multi-loop antenna system includes: a plurality of loop antennas disposed on a substrate and arranged such that each of extending lines extending respectively from geometric centers of the loop antennas to a center point that is bounded by the loop antennas has a predetermined length, and that each of the loop antennas is spaced apart from an adjacent one of the same by a predetermined distance; and a system module facing toward and being spaced apart from and parallel to the substrate such that the grounding plane is able to reflect radiation from the loop antennas. Each of the loop antennas includes first and second radiator portions operable in respective frequency bands; the former having opposite ends that respectively serve as signal-feed and grounding sections; the latter having opposite ends that are connected respectively to the signal-feed and grounding sections.

Abstract: A small antenna using an SRR structure in a wireless communication system includes: a first radiation unit positioned over a dielectric substrate formed of a predetermined dielectric medium and having a predetermined ring shape; a feed unit positioned over the dielectric substrate and configured to feed a signal to the first radiation unit; a second radiation unit positioned under the dielectric substrate and having a predetermined ring shape; a via formed through the dielectric substrate to connect the first and second radiation units; a ground unit positioned under the dielectric substrate and configured to ground the first and second radiation units; and a metal line unit positioned under the dielectric substrate to connect the second radiation unit and the ground unit. The feed unit includes first and second capacitors which accomplish impedance matching when the signal is fed to the first radiation unit.

Abstract: An antenna sheet is provided with a flexible substrate, and an antenna coil, which is connected to a terminal section of an external IC module having an IC chip and is arranged on the substrate. On the substrate, a storing section that stores at least a part of the IC module is formed.

Abstract: The present invention relates to a system for transferring wireless power or signal. The system includes a first antenna; and a second antenna which is located from the first antenna at an arbitrary distance and arranged in an arbitrary direction in comparison with the first antenna, wherein respective spherical modes of the first antenna and the second antenna are allowed to have orders which are same as or larger than a predetermined value to thereby transfer wireless power between the first antenna and the second antenna.

Abstract: An antenna apparatus that may be adapted to various environments. The antenna apparatus includes a radiation unit to transmit and receive in a 360° radius including a plurality of radiators, each radiator configured to radiate a main emission pattern in different direction; and a switch unit configured to selectively operate each of the plurality of radiators.

Abstract: There is disclosed a multiple-input multiple-output (MIMO) antenna system comprising first and second folded or compacted loop antennas (12, 121). The antennas each have a longitudinal extent and are mounted substantially parallel to each other on a dielectric substrate (3) having a conductive groundplane (31, 32). The groundplane extends between the first and second antennas, and the first and second antennas are mounted on the substrate in areas where there is no groundplane. The first and second antennas, in use, generate first and second radiation patterns (31, 32) and also cause currents (30) to flow in the groundplane between the antennas so as to skew the first and second radiation patterns relative to each other by an angle greater than zero, and preferably at an angle of around 50 degrees.

Abstract: A wireless communication system may include a first coil having at least a function of transmitting signal information, a relay coil, and a second coil having at least a function of receiving the signal information, and satisfying Equation (1): RO1>RO2>RO3, where RO1 represents an outer diameter of the first coil, RO2 represents an outer diameter of the relay coil, and RO3 represents an outer diameter of the second coil, and a small portable device, a housing case for a small portable device, and a communication device for a small portable device to be used in the wireless communication system.

Abstract: In a communication partner device (1) intended for the contactless transmission of digital data to be transmitted having a transmission circuit (2), the transmission circuit (2) comprises a modulation circuit (17) for the amplitude modulation of a carrier signal (CS), which modulation circuit (17) comprises a circuit stage (20, 20?) for producing a plurality of different resistance values (RW 1, RW 1?) that act on a signal output (TX1, TX2), which resistance values (RW1, RW1?) can be transformed, by means of a signal processing circuit (3) arranged to transform resistance values that belongs to the communication partner device (1), into transformed resistance values (RW2, RW2?), which transformed resistance values (RW2, RW2?) are responsible for damping a transmission coil (7) of the communication partner device (1) when modulated low-level carrier signal sections are generated in a modulated carrier signal.

Abstract: An antenna device that includes coil antennas each having a coil conductor wound around a winding axis and a planar conductor including a surface and an edge end portion, the surface extending along the winding axis of the coil conductor, the edge end portion being adjacent to a coil opening of the coil conductor. A current flowing through the coil conductor induces a current in the planar conductor, this current produces a magnetic flux in a direction normal to the planar conductor, and thus the planar conductor acts as a booster antenna. The antenna device has directivity in the direction normal to the planar conductor because the magnetic flux produced by the coil antennas and that produced by the planar conductor are combined. This enables the antenna device to occupy a small area while achieving a predetermined communication distance.

Abstract: An NFC communicator has an antenna circuit to enable inductive coupling, via an RF H field, of the NFC communicator and another near field RF communicator in near field range. The antenna circuit has an antenna element coupled in parallel with a first capacitor to form a parallel LC circuit. The antenna element has an antenna coil in series with a second capacitor to reduce the voltage to which circuitry of the NFC communicator is subjected by a received RF H field. Alternatively or additionally, receive circuitry of the NFC communicator may be coupled to only a proportion of the antenna coil to reduce the voltage to which circuitry of the NFC communicator is subjected by a received RF H field.

Abstract: It is an object of the present invention to provide a shared antenna capable of communicating radio waves with different frequencies or different polarization characteristics, having a simple configuration, and capable of being placed in a small device. An antenna 1 according to the invention includes a plurality of loops of the shape of a cross in a spiral fashion and includes a gap 5 provided at a certain midpoint in the spiral loops and a power supply portion 4 provided in a central portion. The distance of the gap 5 is set such that electromagnetic coupling is caused at a first frequency and no electromagnetic coupling is caused at a second frequency different from the first frequency.

Abstract: A resonant radar reflector assembly comprising first and second reflector members (110A, 110B), the first and second and reflector members each being configured to resonate at their respective resonant frequency when irradiated by radio frequency (RF) radiation of a corresponding frequency, wherein the first member has a portion (114A) responsive to an electric field applied parallel to an electric polarization axis of the first member, the second member having a corresponding portion (114B) responsive to an electric field applied parallel to a corresponding electric polarization axis of the second member, the first member also having a portion (112A) responsive to a magnetic field applied parallel to a magnetic polarization axis of the first member, the second member having a corresponding portion (112B) responsive to a magnetic field applied parallel to a corresponding magnetic polarization axis of the second member, the first and second members being arranged such that at least one electric or magnetic pol

Abstract: An antenna configuration is described for high frequency (HF) or very high frequency (VHF) radars contained in a single vertical post. The radar may include a vertical dipole or monopole transmitting antenna collocated with a three-element receive antenna. The three antennas including two crossed loops and a vertical element are used in a direction-finding (DF) mode. Isolation between the three antennas produces high quality patterns useful for determining target bearings in DF mode. The single vertical post is sufficiently rigid mechanically that it may be installed along a coast without guy wires.

Abstract: A remote control for a wireless control system includes a controller, at least one actuator for operating the controller, a radio-frequency (RF) transmitter coupled to the controller, an antenna coupled to the RF transmitter, and a housing for the controller, the RF transmitter, the antenna and a power source. The antenna comprises a conductive loop mounted in the housing and being disposed in a first plane. The remote control further comprises a surface on the housing disposed in a second plane substantially parallel to and overlying the first plane. The surface has a conductive material disposed thereon substantially coplanar with the second plane and substantially coextensive with said conductive loop on said first plane.

Abstract: The present invention relates to the field of data transmission. In one form, the invention relates to the transmission and/or reception of data modulated signals between various devices, including loads and/or antennas. In another form, the invention relates to the field of transponders (tags), such as Radio Frequency Identification Devices (RFID), interrogator devices/systems and the transmission of data between a tag and an interrogator. The present invention utilises antenna design to alleviate tag coupling.

Abstract: The present invention relates to printed or single-sided compound field antennas. The single-sided compound loop antennas have 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 resonant circuit and an antenna device achieve a low resonance frequency without increasing a coil size, and improve communication performance. In the resonant circuit, two coil-shaped conductors are arranged so as to be opposed to each other with a dielectric sheet interposed therebetween. The two coil-shaped conductors are, at the opposed portions thereof, coupled with a capacitance interposed therebetween, and wound so that electric currents flowing through the respective conductors trend in the same direction in a planar view. The opposed area in at least a portion of the outermost windings and/or innermost windings of the coil-shaped conductors is larger as compared with the opposed area in any other winding, and the respective ends of the conductors define power feeding units.

Abstract: A security document (1) in the form of a booklet which has a large number of sheets (11, 12, 13) connected to one another to form the booklet. A first sheet (11) of the security document has a carrier layer (20), an antenna structure (21)—arranged in a first region (41)—for RF communication and an electronic circuit (22)—connected to the antenna structure (21)—with a memory device for storing data, and a communication device—connected to the antenna structure—for communicating data stored in the memory device to a reader via a radio interface by means of the antenna structure (21). A second sheet (13) of the security document has a carrier layer (30) and one or more electrically conductive layers shaped in a second region (43) for the formation of at least one LCR resonant circuit (3).

Abstract: The present disclosure is directed to a system and method for tracking tampered with RFID tags. In some implementations, an RFID tag includes a tearable substrate including at least a portion of an RFID circuit. The portion of the RFID circuit is substantially destroyable in response to at least an attempt to remove the tag from a surface. In addition, the RFID includes an adhesive layer adjacent at least a portion of the tearable substrate and configured to affix the tag to the surface.

Abstract: There is provided a bidirectional transmission coil capable of miniaturizing a structure and carrying out reliable transmission of a data signal. A transmitting coil L1 generates a magnetic flux of a transmission signal by a high frequency signal applied thereto. A receiving coil L2 is arranged to be positioned concentrically with the transmitting coil L1, for inducing a reception signal by the magnetic flux from outside. A first cancel coil Lac is connected to the transmitting coil L1 in series so as to be led-out from a middle of the transmitting coil L and is led-in to the lead-out part. The first cancel coil Lac is arranged so as to sandwich the receiving coil L2 between the first cancel coil Lac and the transmitting coil L1, wherein the magnetic flux in a direction opposite to the magnetic flux from the transmitting coil L1 is generated in the receiving coil L2.

Abstract: A radio frequency IC device includes a radio frequency IC chip arranged to process a transmitted/received signal, a printed circuit board on which the radio frequency IC chip is mounted, an electrode arrange on the circuit board, and a loop electrode that is arranged on the circuit board so that the loop electrode is electrically connected to the radio frequency IC chip and is coupled to the electrode by electromagnetic coupling. The electrode is coupled to the radio frequency IC chip via the loop electrode so as to transmit or receive a high-frequency signal. A power supply circuit board including a resonance circuit and/or a matching circuit may be disposed between the radio frequency IC chip and the loop electrode.

Abstract: A proximity antenna includes a wiring pattern wound in a predetermined direction in a horizontal plane from a signal end to a ground end and a wiring pattern wound in a direction opposite to the predetermined direction in a horizontal plane from a signal end to a ground end, in which the wiring pattern and the wiring pattern are apposed in a vertical direction. The characteristics of a spiral coil having several turns can be thus obtained by a one-turn wiring width, and an installation space for other components, larger than a conventional installation space, can be therefore secured.

Abstract: An antenna coil may include a first coil portion wound with coil wire; a second coil portion wound with coil wire and intersecting with the first coil portion; and a case having a coil receiving portion receiving the first coil portion and the second coil portion, in which the first coil portion and the second coil portion are disposed so that extending directions of the respective coil portions are directed in diagonals direction of the coil receiving portion.

Abstract: Provided is a non-contact communication device including an antenna configured to transmit data through non-contact communication after load-modulation of an RF signal from a reader/writer (R/W), wherein the antenna includes: a standard coil having an aperture with a predetermined size; and a small coil having an aperture with a size smaller than a size of the standard coil, wherein the standard coil and the small coil are connected in series or in parallel, and the small coil is arranged such that the aperture of the small coil overlaps a winding part of a coil that is an antenna of the R/W when the non-contact communication device is caused to face the R/W by matching a predetermined position of the non-contact communication device with a reference position of the R/W determined in advance as a position with which the predetermined position of the non-contact communication device is to be matched.

Abstract: According to various aspects, exemplary embodiments are provided of antenna assemblies. In one exemplary embodiment, an antenna assembly generally includes at least one antenna element having first and second electrical paths. The antenna assembly may also include at least one reflector element spaced-apart from the antenna element for reflecting electromagnetic waves generally towards the antenna element.

Abstract: A system comprises a first sensing device, a first Sterba Curtain, and a first modulating device communicatively coupling the first sensing device to the first Sterba Curtain. The first sensing device is configured to sense at least a first parameter. The first Sterba Curtain is configured to receive at least a first incident electromagnetic wave and to selectively transmit and reflect portions of the first incident electromagnetic wave. The first modulating device is configured to selectively convey a first signal representing the first parameter by modulating at least one of a first transmitted component of the first incident electromagnetic wave and a first reflected component of the first incident electromagnetic wave.

Abstract: An RF coil unit of an embodiment includes a plurality of first coil elements each having a first main loop which receives a magnetic resonance signal and a plurality of second coil elements each having a second main loop and a sub-loop protruding from a portion of the second main loop. Any combination of two coil elements chosen from the plural first coil elements and the plural second coil elements is arranged in an overlap area where areas surrounded by one and another one of the two coil elements overlap in such a way that the overlap area is located in an area surrounded by the first main loop.

Abstract: An antenna and a wireless communication device which are suitable for an RFID system and in which radiation characteristics are prevented from being changed as a result of impedance adjustment are configured such that the antenna includes a first loop electrode that has an external shape of a regular polygon or circle and that includes a pair of open ends, feeding portions arranged inside the first loop electrode, a second loop electrode connected to the feeding portions, and a coupling electrode that couples the first loop electrode and the second loop electrode to each other. The wireless communication device is obtained by coupling the wireless communication element which processes a high-frequency signal to the feeding portions.

Abstract: A rod antenna and antenna circuit are described which make use of negative feedback to reduce the Q of the antenna, but which also makes use of a different coil tapping arrangement to significantly reduce electric field susceptibility on the detected signal from the main coil as well as different biasing arrangements to reduce noise. More particularly, in some embodiments of the invention the main detector coil of the antenna has a centre tap that is AC grounded with signal taps then being taken from the opposite ends of the main coil, and being respectively fed to the inputs of a differential amplifier. The output of the differential amplifier is then fed to the magnetic circuit of the rod antenna via a second inductor winding that is magnetically coupled to the resonance circuit of the main antenna coil.

Abstract: A dual-loop antenna includes a grounding unit, a shorting unit, a feeding unit, a first loop radiating unit and a second loop radiating unit. The shorting unit has at least one shorting pin disposed on the grounding unit. The feeding unit has at least one feeding pin separated from the shorting pin by a predetermined distance and suspended above the grounding unit at a predetermined distance. The first loop radiating unit is disposed above the grounding unit at a predetermined distance. The first loop radiating unit has two ends respectively electrically connected to the shorting unit and the feeding unit. The second loop radiating unit is disposed above the grounding unit at a predetermined distance and around the first loop radiating unit. The second loop radiating unit has two ends respectively electrically connected to the shorting unit and the feeding unit.

Abstract: A device includes a first substrate that has a first antenna having a first loop and second loop that form loop shapes viewed in a planar projection; and a second substrate that has a second antenna having a third loop and fourth loop that form loop shapes viewed in the planar projection. The first substrate and the second substrate are disposed so that the first antenna and the second antenna face each other. At least when the first substrate and the second substrate operate, the first antenna and the second antenna are in a state that the first antenna and the second antenna are capable of being magnetically coupled.

Abstract: A common communications device comprising an array of near-field coupled resonant elements, the elements each comprising a coupling portion comprising a loop portion with free ends, the device being provided in combination with a data transmission unit and a data reception unit, each unit having a coupling portion, the units being arranged to communicate with one another by means of the coupling portion of each unit and the common communications device, the coupling portion of the data transmission unit comprising a resonant element comprising a loop portion arranged to be near-field coupled to the loop portion of a first resonant element of the device, the coupling portion of the data reception unit comprising a resonant element comprising a loop portion arranged to be near-field coupled to the loop portion of a second resonant element of the device not being the first resonant element.

Abstract: A sensor system having a sensor module and an induction unit is provided, the sensor module having a first antenna, and the induction unit having a second and a third antenna, an induction transmission of signals being provided between the first and the second antenna, and the signals being sent and/or received electromagnetically by the third antenna.

Abstract: An antenna loop layout method for an electromagnetic sensor board is provided. The electromagnetic sensor board has a plurality of inductive antennas which are arranged abreast of each other. One end of the inductive antennas is coupled to each other, and the other end of the inductive antennas have a switch. The method comprises the following steps: first, a pre-determined interval value is provided. Then, the switches are closed in sequence by the pre-determined interval value to form a plurality of physical antenna loops. The pre-determined interval value can be changed dynamically.

Abstract: An antenna apparatus has a first antenna branch and a second antenna branch. Both the first and the second antenna branch are in the form of a conductor loop which is not closed, and the first antenna branch is arranged at a distance from the second antenna branch in a direction which is substantially at right angles to the surface bounded by the respective conductor loop, such that the first loop direction, which is defined from the foot point to the free end of the first antenna branch, is arranged in the opposite direction to the second loop direction, which is defined from the foot point to the free end of the second antenna branch.

Abstract: A multi-loop antenna module with wide beamwidth includes a grounding unit and a plurality of first loop units and second loop units. The first loop units are vertically disposed on outer peripheral sides of the grounding unit. Each first loop unit has a first shorting pin disposed on the grounding unit, a first feeding pin separated from the first shorting pin and suspended above the grounding unit, and a first loop radiating body connected between the first shorting pin and the first feeding pin. The second loop units are vertically disposed on outer peripheral sides of the grounding unit. Each second loop unit has a second shorting pin disposed on the grounding unit, a second feeding pin separated from the second shorting pin and suspended above the grounding unit, and a second loop radiating body connected between the second shorting pin and the second feeding pin.

Abstract: Location determination is performed using a transmitter including an elongated generally planar loop antenna defining an elongation axis. The elongation axis is positioned along at least a portion of a path. A magnetic field is then generated which approximates a dipole field. Certain characteristics of the magnetic field are then determined at a receiving position radially displaced from the antenna elongation axis. Using the determined certain characteristics, at least one orientation parameter is established which characterizes a positional relationship between the receiving position and the antenna on the path. The magnetic field may be transmitted as a monotone single phase signal. The orientation parameter may be a radial offset and/or an angular orientation between the receiving position and the antenna on the path. The antenna of the transmitter may be inserted into a first borehole to transmit the magnetic field to a receiver inserted into a second borehole.

Abstract: In an antenna for an RFID device, a feed coil is coupled to a first booster coil and a second booster coil through an electromagnetic field. In the feed coil, a first region and a second region are disposed so as to overlap with the first booster coil and the second booster coil, respectively. The first region of the feed coil is coupled to the first booster coil through an electromagnetic field, and the second region of the feed coil is coupled to the second booster coil through an electromagnetic field. Accordingly, the antenna has a high degree of coupling between the feed coil and a booster antenna and superior transmission efficiency of an RF signal, and prevents the occurrence of a null point.

Abstract: The presence or absence of objects (e.g., medical implements, medical supplies) tagged with transponders may be determined in an environment in which medical procedures (e.g., surgery) are performed via an interrogation and detection system which includes a controller and a plurality of antennas positioned along a patient support structure. The antennas may, for example, be positioned along an operating table, bed, a mattress or pad or a sheet and may be radiolucent. Respective antennas may successively be activated to transmit interrogation signals. Multiple antennas may be monitored for responses from transponders to the interrogation signals. For example, all antennas other than the antenna that transmitted the most recent interrogation signal may be monitored.

Abstract: To provide an antenna device capable of diminishing gain changes caused by a human body. An antenna device has a magnetic current antenna 401 that takes a magnetic current as a source of emission; an electric current antenna 402 that takes an electric current as a source of emission; and an electric current/magnetic current distribution control circuit 403 that feeds signals to the magnetic current antenna 401 and the electric current antenna 402, wherein the magnetic current antenna 401 and the electric current antenna 402 are arranged in such a way that a polarized wave emitted from the magnetic current antenna 401 and a polarized wave emitted from the electric current antenna 402 cross each other at right angles. The electric current/magnetic current distribution control circuit 403 controls distribution of a radio wave emitted from the magnetic current antenna 401 and a radio wave emitted from the electric current antenna 402.

Abstract: A multiple-input multiple-output (MIMO) device includes a substrate, a shielding cover and a MIMO antenna. The shielding cover is positioned on the substrate, and includes a plurality of sidewalls. The MIMO antenna includes a first solid antenna, a second solid antenna, and a plane antenna. The first solid antenna and the second solid antenna are electrically connected to two ends of one sidewall of the shielding cover, respectively. The first plane antenna is configured on the substrate, and disposed between the first solid antenna and the second solid antenna.

Abstract: Apparatus (20) comprising: an antenna (12) connectable to a first terminal (38) and to a second terminal (40) and comprising a first conductive part (34) and a second conductive part (36), the first conductive part being configured electrically in parallel with the second conductive part, the first conductive part (34) being configured to have a first electrical length and the second conductive part (36) being configured to have a second electrical length together providing a common resonant mode having a first operational frequency band, the second conductive part (36) substantially providing a common resonant mode having a second operational frequency band and the first conductive part (34) substantially providing a differential resonant mode having a third operational frequency band.

Abstract: A microwave antenna for wireless interconnection of automation devices has a first printed circuit board, on which a first conductor loop is arranged as a printed conductor track. A second printed circuit board having a second conductor loop in the form of a printed conductor track is arranged transversely with respect to the first printed circuit board. The second printed circuit board is attached to the first printed circuit board. The conductor loops are connected to a common feed connection. A bypass line connects one end of each the first and the second conductor loops.

Abstract: An ultra-wideband, low profile antenna is provided. The antenna includes a ground plane substrate and a radiating element. The radiating element includes at least two loop sections, wherein each of the at least two loop sections is electrically connected to a feed network and to the ground plane substrate. The radiating element is configured to radiate over a first frequency band when the feed network provides an in-phase input signal to the at least two loop sections and to radiate over a second frequency band when the feed network provides an out-of-phase input signal to the at least two loop sections. The second frequency band includes a lower frequency than the first frequency band.