Abstract: A slotted bifilar or quadrifilar helix antenna has a plurality of helical antenna elements. The antenna elements have an outer planar surface. A slot element is secured to an interior of the outer planar surface. The slot element extends radially inwardly to a slot element edge. At least two radially opposite slot element edges define a tapered slot. At a shorted point on the antenna, at least one radially opposite pair of slot elements are electrically shorted together. A feed point is axially offset from the shorted point along the antenna axis.

Abstract: The disclosure discloses a wireless device, includes a shell and a signal circuit board, wherein one or more loop-closed slot antennae are arranged on the shell; the slot antenna is provided with a feeding point and a grounding point; the feeding point and the grounding point are respectively connected with two ends of an slot antenna; and the feeding point is connected with the signal circuit board polarly. In the wireless device provided by the disclosure, one or more loop-closed slot antennae are arranged on the shell, and receiving and transmitting effects are achieved directly by utilizing a conductor slot on the shell, so that antenna in the shell can be saved; therefore, the space on a Printed Circuit Board (PCB) is saved and the wireless device is miniaturized.

Abstract: A transition for coupling a microwave signal between a transmission line formed on a planar dielectric substrate and a hollow waveguide may include a half-notch antenna formed on a portion of the dielectric substrate extending into an open end of the hollow waveguide.

Abstract: An implantable medical device may include a case which houses components of the implantable medical device. The implantable medical device may include an inductive coil coupled to a rechargeable battery. The inductive coil may be operative to inductively couple to an external coil and to transfer energy from the external coil to the rechargeable battery to recharge the rechargeable battery. The implantable medical device may include a cutout formed in the case of the implantable medical device and filled with a dielectric material. The cutout may be operative to reduce eddy currents in the case during recharge of the rechargeable battery. The implantable medical device may include a slot antenna disposed within the case. The slot antenna may be operative to communicate with an external device through the cutout in the case.

Abstract: In a line conversion structure, a slot line includes a slot ground conductor connected to a ground layer with a through conductor that passes through the dielectric layer, a slot signal conductor, and a slot disposed between the slot ground conductor and the slot signal conductor. A signal conductor of a microstrip line is orthogonal to the slot ground conductor and the slot, with a gap between the signal conductor and the slot ground conductor, and an end of the signal conductor is connected to the slot signal conductor, and a length L of a portion of the slot ground conductor, the portion being parallel to the signal conductor with the gap, is less than or equal to 0.25 times a wavelength of a signal transmitted through the microstrip line.

Abstract: A control module has a conductive metal chassis with a chassis body and a chassis lid. A non-conductive opening is formed within the chassis body and a tab extends from the chassis lid engaging edges of the non-conductive opening to create a rectangularly-shaped non-conductive aperture with a longitudinal axis having a predetermined length for forming a slot antenna structure. The predetermined length is designed to communicate with a specific communications frequency. The slot antenna structure is signally interconnected to a transceiver housed within the chassis.

Abstract: The present invention relates to a multiple-port dual-band antenna system and the associated interface formed by DPDT or SPDT switches, that can be integrated on one and the same multi-layer structure.

Abstract: Dual-band antennas that are embedded within portable devices such as laptop computers. In one aspect, a dual-band antenna for a portable device (e.g., laptop computer) includes a first element having a resonant frequency in a first frequency band and a second element having a resonant frequency in a second frequency band, wherein the first element is connected to a signal feed, wherein the second element is grounded, and wherein the first and second elements are integrated within a portable device.

Abstract: The present invention is a low profile, wideband, high gain and high efficiency multi-band antenna with good return loss for wireless applications such as WLAN Access Point, ZigBee or WiMAX module, notebook computer, tablet computer and other mobile and portable devices applications and it can be used with any RF-front end circuitry that is working at 2.4-2.5 GHz, 3.2-3.5 GHz and 4.9-6.8 GHz frequency band. Moreover, the antenna assembly comprises a radiating element and two parasitic branches, all of which are sealed in a plastic housing with the feed pin and ground pin exposed for soldering onto a printed circuit board and thus it is easy for customers to assemble; they just need to solder the antenna pins on a printed circuit board and it will be operational. The L-shaped structure and the plastic housing make the antenna to be compact in size so it can be easily fabricated and employed in computers.

Abstract: The present invention is a low profile, wideband, high gain and high efficiency multi-band antenna with good return loss for wireless applications such as WLAN Access Point, ZigBee or WiMAX module, notebook computer, tablet computer and other mobile and portable devices applications and it can be used with any RF-front end circuitry that is working at 2.4-2.5 GHz, 3.1-3.4 GHz and 4.9-5.9 GHz frequency band. Moreover, the antenna assembly comprises a planar body sealed in a plastic housing with the feed pin and ground pin exposed for soldering onto a printed circuit board and thus it is easy for customers to assemble; they just need to solder the antenna pins on a printed circuit board and it will be operational. The flat structure and the plastic housing make the antenna to be low profile and compact in size so it can be easily fabricated and embedded into a notebook computer and tablet computer.

Abstract: An antenna system comprises a plurality of conductors, a combiner, and a plurality of loads. The combiner has an output port. The plurality of loads connects the plurality of conductors to each other in line. The plurality of loads has an impedance equal to a desired impedance for the output port. The combiner combines power received by the plurality of loads at the output port of the combiner.

Abstract: Methods, antennas and other embodiments associated with impedance matching an antenna feed slot are based on a fractal shape. A slot antenna includes a planar metal sheet. A feed slot opening is formed in the metal sheet. The feed slot has a first end and a second end. A tapered opening is formed in the metal sheet. Adjacent sides of the tapered opening touch the first end of the feed slot. An impedance matching fractal shaped opening is formed in the metal. The impedance matching fractal shaped opening touches the second end of the feed slot.

Abstract: The present disclosure relates to a combined and compact monopole and slot antenna providing circular polarization for various applications, such as ultra high frequency (UHF) radio frequency identification (RFID). The antenna of the present invention combines a slot antenna with a monopole antenna using a single feed to drive both, effectively resulting in a circular polarized antenna. In an exemplary embodiment, the antenna may be integrated internally to a mobile device and printed on a flex or a printed circuit board (PCB), made from sheet metal, etc. Advantageously, the design of the antenna provides performance similar to circular polarized patch antennas while avoiding the size, weight, and cost.

Abstract: An exemplary dual-band antenna includes a first antenna unit and a second antenna unit for receiving /sending radio frequency signals corresponding generating a low resonant frequency and a high resonant frequency. The first antenna unit is perpendicularly connected to the second antenna unit. The second antenna unit includes a feed portion, two slots, two gaps and two grounding sheets. The feed portion is electrically connected to the first antenna unit and is used to receive radio frequency signals. The slots are adjacent to one side of the first antenna unit and are defined at the both sides of the feed portion, and the slots are connected with the feed portion and used to radiate radio frequency signals. The gaps extend away from a position of the first antenna unit and are defined at the both sides of the feed portion, and each gap communicates with corresponding slot. The grounding sheets are symmetrically positioned at both sides of the feed portion.

Abstract: An electronic device may be provided with a conductive housing. The conductive housing may be formed from a metal. Slots may be formed in the housing. The slots may serve as an antenna and may be fed using an antenna feed structure within the electronic device housing. The electronic device may have a frame to which housing structures are attached and may have a stand or other support structure. The frame may be used to mount a display, to support housing walls, to support clutch barrel structures, etc. The slots may be formed in the frame or in a space between the frame and the housing walls. The slots or other antenna structures may also be formed in the stand. Multiple slots may be used together to support operations in two or more communications bands. There may be multiple dual slot antennas in the electronic device.

Abstract: A sheet-like dipole antenna includes a substrate (1), an F-shape antenna (2), and a cable (3). The substrate (1) has a copper clad surface (11) and a slot (12). An insulating film (13) is provided on the copper clad surface (11) and the slot (12). A first soldering region (14), a second soldering region (15), and a third soldering region (16) are positioned adjacent to the slot (12). The cable (3) has a core (31) coated with an insulating layer (32). The insulating layer (32) is coated with a grounding layer (33). The grounding layer (33) is coated with an outer skin (34). One end of the cable (3) is electrically connected to a connector (35). The core (31) is connected to the second soldering region (15). The grounding layer (33) is soldered to the third soldering region (16).

Abstract: Methods, antennas and other embodiments associated with impedance matching an antenna feed slot. A slot antenna includes a planar metal sheet. A feed slot opening is formed in the metal sheet. The feed slot has a first end and a second end. A tapered opening is formed in the metal sheet. Adjacent sides of the tapered opening touch the first end of the feed slot. An impedance matching star shaped opening is formed in the metal. The impedance matching star shaped opening touches the second end of the feed slot.

Abstract: Techniques involving a slot antenna and associated functionality are described. In one or more implementations, the techniques describe a slot antenna that is usable for wireless communication in a mobile communication device. The mobile communication device may include one or more modules communicatively coupled to the slot antenna and configured to employ the slot antenna to enable the wireless communication.

Abstract: A microwave device of the slot-line type with a photonic band gap structure, including at least: a first substrate in a dielectric material having a first permittivity ?r1, a second substrate in a dielectric material having a second permittivity ?r2, and between the two substrates, a conductive layer in which at least one slot-line is engraved, with, on the face of the first and second substrates opposite the face in contact with the conductive layer, facing the slot-line, periodic metal patterns. A compact filtering structure is realized.

Abstract: According to an embodiment of the present invention, an electromagnetic radiation apparatus includes a ground plane and an integrally formed antenna structure. The integrally formed antenna structure may include a radiation plate perpendicular to or with an angle larger than 45 degrees to the ground plane and a shielding structure configured to restrict radiation of the radiation plate.

Abstract: The described method and system provide an antenna feed for a slot antenna that may be patterned into a solar-reflective glazing layer with a virtual ground that is a short electrical distance from the antenna. One implementation of the present invention provides an antenna feed for a slot antenna patterned into the solar-reflective glazing used in a vehicle windshield. Because the antenna feed may incorporate a virtual ground that is a short electrical distance from the slot antenna, antenna performance may be improved over conventional on-glass vehicle antenna systems which use the vehicle chassis as a ground. Furthermore, patterning the slot antenna into the solar-reflective glazing layer and using a virtual ground in the antenna feed provides flexibility in antenna placement.

Abstract: A highly efficient thin slot antenna having a cavity and an RFID tag device are provided, in which such flexible properties can be provided to the antenna that the antenna can be worn on the curved surface of a human body, an object, or the like as well as the antenna can be relatively freely deformed, and changes in the characteristics caused by deformation and changes in the characteristics caused by a product to mount the antenna thereon. are extremely small. Conductive foil such as aluminum or foil vapor deposited with conductive metal such as aluminum is used to form a bag shape for configuring a bag-shaped product having a cavity (12). A relatively soft dielectric sheet (13) is provided inside the cavity (12), and a slot (14) is provided lengthwise on one side of the bag-shaped product at the center position in the width direction.

Abstract: A chip package includes a plurality of layers including conductive planes connected by vias. The layers include a first portion having an antenna formed therein and a parallel-plate mode suppression mechanism to suppress parallel-plate mode excitation of the antenna. The parallel-plate mode suppression mechanism includes a reflector offset from an antenna ground plane and first grounded vias. A second portion has an interface for connecting to an integrated circuit device wherein the first portion and the second portion are separated by the parallel-plate mode suppression mechanism.

Abstract: A broadband circularly-polarized spidron fractal antenna is disclosed. The broadband antenna of the present invention can realize a bandwidth exceeding 70% without using a multilayer substrate to implement the broadband properties, by forming a geometric structure of a slot, i.e., a spidron fractal, which has not been used in the conventional antennas, on the ground surface of the antenna. The present invention can also induce the radiation properties of a circularly-polarized wave from the properties of the spidron fractal shape, without employing an additional secondary circuit such as a phase distribution circuit for implementing the circularly-polarized wave. Due to such properties described above, the present invention can implement a small broadband circularly-polarized antenna that costs less to manufacture.

Abstract: A radiator element for RF communications formed of a planar conductive material positioned upon a planar dielectric substrate surface. Two lobes formed of the conductive material have side edges abutting a cavity decreasing in cross section between the lobes. The cavity has a widest point configured to receive RF frequencies at the lowest frequency and a narrowest point configured to receive a highest frequency of the element. Opposing pairs of notches in the side edges of the lobes along the decreasing edges of the cavity enhance the frequency of operation for frequencies paired to the distance between the pairs of notches.

Abstract: An omnidirectional RF radiator element formed upon a surface of a planar dielectric substrate. The element features a plurality of cavities narrowing in cross-section and formed upon a surface of said planar substrate which narrow from a widest point to a narrowest point. Feed lines communicate with each cavity for transmission and reception of RF therethrough. Each radiator element is engageable with other elements in a stacked configuration using connectors engaged to the feed lines and configured for cooperative engagement with other connectors.

Abstract: An antenna element is disclosed. A conductive plate is adapted to be electrically connected to an electric ground, and has a first edge. A second edge opposes the first edge and is formed with a first slit elongated in a first direction. A third edge intersects the first edge. A recessed part intersects the first edge and the third edge. A conductive member elongates from the second edge in the first direction.

Abstract: A slot antenna located on a substrate with a first surface and a second surface opposite to the first surface includes a feeding portion, a grounding portion and a radiating portion. The feeding portion is located on the first surface of the substrate to feed electromagnetic signals. The grounding portion is rectangular and located on the second surface of the substrate, and defines a circular clearance in a substantial center portion thereof. The radiating portion is located on the second surface of the substrate and comprises at least one elongated microstrip with one end connected to the grounding portion and the other end extending towards the center of the circular clearance, wherein the feeding portion interacts with the radiating portion to transmit the electromagnetic signals.

Abstract: Slot antennas are provided for electronic devices such as portable electronic devices. The slot antennas may have a dielectric-filled slot that is formed in a ground plane element. The ground plane element may be formed from part of a conductive device housing. The slot may have one or more holes at its ends. The holes may affect the impedance characteristics of the slot antennas so that the length of the slot antennas may be reduced. For example, the holes can be used to synthesize the impedance of the slot antennas so that the slot antennas have a resonant frequency that is different from their natural resonant frequency. The holes may affect the impedance of the slot antennas in multiple radio-frequency bands.

Abstract: An antenna device includes a feeding member including a coil pattern and an emitting member to emit a transmit signal supplied from the feeding member and to receive a receive signal and supplying it to the feeding member. The emitting member includes an opening portion and a slit portion communicating with the opening portion. When seen in plan view from the direction of the winding axis of the coil pattern, the opening portion of the emitting member and the inner region of the coil pattern overlap each other, and the emitting member and the coil pattern overlap each other at least partially.

Abstract: An antenna and a method for using the antenna in a wireless appliance are provided. The antenna includes a conducting surface having a length and a width; a dielectric slit having a slit length portion oriented along either the length or the width, the slit forming two lips on the conducting surface; the slit having an opening on one of the length and the width, the opening having a flare size; a feed-point element connecting the two lips; wherein the dimensions of the length, the width, the slit length portion, and the flare size are smaller than an effective propagation wavelength of the RF radiation in the antenna. An antenna including a conducting surface having a conductive plate with a plate area defined by a plate perimeter overlaying a portion of a conducting surface is also provided. A method to provide an antenna as above is also disclosed.

Abstract: An antenna apparatus includes: an extension conductor connected to a first section of an outer perimeter of an antenna element and along an entire length of the first section; connecting conductors connecting the antenna element to a ground conductor between the extension conductor and feed points on the antenna element; and a slit extending from the extension conductor to the antenna element so as to intersect a portion between connecting points of the connecting conductors and to intersect a portion between the feed points on the antenna element. The slit has a short-circuited end on the extension conductor.

Abstract: A novel geometry, the geometry of Space-Filling Curves (SFC) is defined in the present invention and it is used to shape a part of an antenna. By means of this novel technique, the size of the antenna can be reduced with respect to prior art, or alternatively, given a fixed size the antenna can operate at a lower frequency with respect to a conventional antenna of the same size.

Abstract: Methods for assembling an active array system are described. In one exemplary embodiment, an active subarray panel assembly having a first surface with a first array of electrical contacts and a radiator aperture with an array of radiator structures and an aperture mounting surface with a second array of electrical contacts are assembled together. The first surface of the panel assembly and the aperture mounting surface of the radiator aperture are brought into contact with an adhesive layer including microwave interconnects in a pattern corresponding to the first array of electrical contacts and the second array of electrical contacts so that the adhesive layer is between the first surface of the panel assembly and the aperture mounting surface of the radiator aperture. Pressure, heat and vacuum are applied to cure the adhesive and complete engagement of the microwave interconnects.

Abstract: A radial line slot array antenna has a slotted conductor plate in which a plurality of slots are formed and arranged in a spiral. The plurality of slots are arranged in the slotted conductor plate such that the arrangement distance in a radial direction between the slots varies gradually between a first portion determined based on a first frequency and a second portion determined based on a second frequency that is different from the first frequency.

Abstract: An antenna is provided. The antenna includes a substrate, a feed conductor, a ground layer and a radiation slot. The substrate includes a first surface and a second surface, wherein the first surface is opposite to the second surface. The feed conductor is formed on the first surface. The ground layer is formed on the second surface. The radiation slot is formed on the ground layer, including a first radiation portion, a second radiation portion and a third radiation portion, wherein the second radiation portion connects the first radiation portion and the third radiation portion, the radiation slot is U shaped, and the feed conductor corresponds to a location between the second radiation portion and the third radiation portion.

Abstract: A portable communication device (100, 800, 900) has an antenna element (102, 1206). The antenna element forms a slot (104, 1208) which is used as a slot antenna. The device is configured such that the slot facilitates operation of a user interface element through the slot.

Abstract: Disclosed is an apparatus and method to create multiple signals by utilizing the ground plane as part of the antenna. The apparatus comprises an excitation structure that includes a first segment and a second segment joined to form an angle, the first segment to generate a first signal and the second segment to generate a second signal. The apparatus also includes a ground plane that includes a slot with a perimeter, the excitation structure residing within the perimeter of the slot. Further, the apparatus also includes at least one ground arm coupled to the ground plane and formed from at least a portion of the perimeter of the slot, the at least one ground arm to generate a third signal from at least one of the first signal or the second signal.

Abstract: A dual polarized dipole wearable antenna may be embedded within a shirt or/and outfit, placed at a range of up to few millimeters from the body of a user in which there is a transmitting swallowable imaging device. The antenna is constructed of three conducting layers: radiating layer, feed network layer and ground layer, separated by two dielectric substrate layers. The feed network layer may receive and transmit horizontally polarized signals. When placed one on top of the other, parallel strips of the radiating layer are disposed against a longitudinal strip of the feed network layer, and stubs of the feed network layer are disposed across a slot of the radiating layer. The slot of the radiating layer may be excited by radiation from, and be in interaction with the stubs of the feed network layer to receive and transmit vertically polarized signals.

Abstract: A slot antenna having stubs is provided, in which a strip transmission line for transmitting a transverse electromagnetic mode (TEM) signal is formed by using a multi-layered substrate, and a plurality of slots are used for the strip transmission line. Thus, an omnidirectional radiation pattern is obtained, and the directivity of the slot antenna is improved.

Abstract: An integrated circuit (IC) antenna structure includes a micro-electromechanical (MEM) area, a feed point, and a transmission line. The micro-electromechanical (MEM) area includes a three-dimensional shape, wherein the three dimensional-shape provides an antenna structure. The feed point is coupled to provide an outbound radio frequency (RF) signal to the antenna structure for transmission and to receive an inbound RF signal from the antenna structure. The transmission line electrically coupled to the feed point.

Abstract: Directional wide band antenna that may be utilized to enhance cell phone coverage within a building, or for signals intelligence collection (SIGINT). Includes a log-spiral slot antenna with feed-point configured to transfer energy to/from the antenna. Includes an energy absorbent backing and an energy absorbent siding coupled with the log-spiral slot antenna. Includes a cavity behind the log-spiral slot antenna and in front of the energy absorbent backing. Includes a cable connector coupled to a tapered microstrip line coupled to the feed-point wherein the tapered microstrip line is configured to transform the input impedance to the antenna impedance. Housed in a container configured to hold the above listed components. Energy absorbent siding, cavity and energy absorbent backing greatly reduces back lobes. Another embodiment has log-spiral shaped slots at an outer portion of the log-spiral slot antenna overlap with the energy absorbent siding and wherein the feed-point overlaps the cavity.

Abstract: An antenna module is provided. The antenna module includes an antenna and an EBG element. The EBG element includes an EBG ground layer, a plurality of reflective units and a plurality of connection posts. The reflective units are arranged in a matrix, a gap is formed between the nearby reflective units, and the reflective units are corresponding to the antenna. Each connection post connects the reflective unit to the EBG ground layer.

Abstract: An antenna includes a U-shaped radiator portion having a first extending arm and a second extending arm parallel and adjacent the first extending arm and coupled to the first extending arm by a junction portion, where the first and second extending arms and the junction portion defining a slot. The antenna further includes a ground plane physically coupled only to the first extending arm and a distributed feed element disposed at least partially within the slot and operable to radiate electromagnetic signals within a first frequency range and electrically excite at least portions of the radiator portion at at least a second frequency range having frequencies outside the first frequency range, thereby causing the radiator portion to radiate electromagnetic signals within the second frequency range.

Abstract: A composite polarizer including a first polarizer having a plurality of parallel metal vanes and a second polarizer having a plurality of parallel layers of dielectric material is provided. The first polarizer is disposed on an axis, and has a phase advance orientation orthogonal to the axis. The second polarizer is disposed on the axis and has a phase advance orientation orthogonal to the axis. The first polarizer has a first differential phase shift for a first frequency f1 and a second differential phase shift for a second frequency f2. The second polarizer has a first differential phase shift for the first frequency f1 and a second differential phase shift for the second frequency f2. A total of the first differential phase shifts of the first and second polarizers is about 90°, and a total of the second differential phase shifts of the first and second polarizers is about 90°.

Abstract: There is provided a radio apparatus which includes an antenna device and a housing to which the antenna device is attached. The antenna device includes a substrate includes an electrically conductive layer with a slit. The slit is formed at an end of the electrically conductive layer so that the slit includes an opening end. The antenna element is electrically coupled with the electrically conductive layer across the opening end via a matching circuit, and receives an electric power through one end of the antenna element.

Abstract: An antenna which reduces the number of end faces and perpendicular corners, and suffers from little deterioration of performance even if used for high frequency transmission/reception, in particular a microstrip patch antenna which is comprised of a dielectric substrate on the bottom surface of which a conductive ground plate is formed and on the top surface of which a patch antenna part formed by a conductor and a feeder circuit connected to the same are provided, wherein the feeder circuit is connected to the antenna part while offset by exactly a predetermined distance to either end side from a center of one side of said antennas part to which said feeder circuit is to be connected so that a transmission loss of the antenna becomes a predetermined value or less. The predetermined distance can be made 20 to 70% of the longitudinal side of the patch antenna part.

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

Abstract: The present invention relates to a method for producing an antenna operating in a given frequency band, from a dual-band antenna. According to the method, the dual-band antenna is a broadband slot antenna that receives and/or transmits electromagnetic signals at a first frequency and at a second higher frequency. The antenna is powered by a single power supply line, and the free end of the power supply line is connected, by a connection means that can be opened or closed, to at least one means for rejecting one of the frequencies. This invention can be used in producing generic electronic boards.

Abstract: The present invention is a multi-element anti-jamming (A/J) antenna array. The antenna array includes a first antenna assembly configured for being fuse-mounted a first distance from an aft end of at least one of an artillery shell and a munition. The antenna array further includes a second antenna assembly configured for being fuse-mounted a second distance from an aft end of at least one of the artillery shell and the munition, the second distance being lesser than the first distance. Further, the antenna array includes multi-band functionality.