Abstract: The invention relates to a microstrip patch antenna for mobile satellite communications comprising a first electrically conducting ground plane having at least one opening, at least one patch radiating element, at least one first dielectric layer, disposed between the first electrically conducting ground plane and the patch radiating element and more particularly between the at least one opening and the patch radiating element, at least one feed line for providing signal energy in a contactless manner to or from the patch radiating element through the opening and a second dielectric layer disposed between the feed line and the first electrically conducting ground plane wherein the antenna further comprises a second ground plane and a third dielectric layer disposed between the second ground plane and the feed line.

Abstract: A dual-band, dual-orthogonally-polarized antenna element includes a dielectric substrate having a conductor layer that includes a square ring slot and a shorted square ring, with each having a pair of orthogonal feed points. The shorted square ring is fed with coaxial probe feeds, while the square ring slot feeds striplines terminated in open-circuited stubs for coupling energy to each pair of orthogonal feed points. The first and second stripline feeds are not coplanar in order that each stub terminates past a center point of the element. The square ring slot operates as a high frequency band radiator and the shorted square ring operates as a low frequency band radiator, and both bands radiate substantially simultaneous dual-orthogonally-polarized modes. The modes can be any combination of dual-Circular Polarization (CP) and dual-Linear Polarization (LP), depending on the geometry of the radiators.

Abstract: Provided is a microstrip patch antenna in which a unit cell of a planar metamaterial may be inserted to have a miniaturized size, a wide bandwidth, or multi-resonance.

Abstract: A slot antenna is formed on a base. The base includes a first surface and an opposite second surface. The slot antenna includes a feeding portion formed on the first surface, a ground portion and a radiating portion formed on the second surface. The radiating portion includes a first radiating body being surrounded by a first slot, a second radiating body being surrounded by a second slot, a first switch and a second switch. The first switch is set between the first radiating body and the ground portion. The second switch is set between the second radiating body and the ground portion.

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: An antenna apparatus for use in a transmitter or a receiver in a communication system. The antenna apparatus includes: a dielectric substrate having a conductor layer on one of surfaces; and a slot antenna including an antenna electrode formed on the one surface and disposed substantially at the center, a grounded conductive surface surrounding the antenna electrode, and a slot transmission line made by a gap between the antenna electrode and the grounded conductive surface.

Abstract: A coupling device is provided, including a substrate, a ground element, a first feed conductor and a second feed conductor. The substrate includes a first surface and a second surface. The ground element is disposed on the second surface, wherein the ground element includes a first portion, a second portion, an annular groove and a feed slot, the annular groove is located between the first portion and the second portion, enclosing the first portion, and a first end of the feed slot is connected to the annular groove. The first feed conductor is disposed on the first surface corresponding to the annular groove, wherein the first feed conductor couples the ground element to feed a current signal. The second feed conductor is disposed on the first surface corresponding to the feed slot, wherein second feed conductor couples the feed slot to feed a magnetic current.

Abstract: A coupling device is provided. The coupling device has a substrate, a ground element, a first feed conductor and a second feed conductor. The substrate has a first surface and a second surface. The ground element is disposed on the second surface, wherein the ground element has a first annular groove, a second annular groove and a feed slot, the second annular groove surrounds the first annular groove, the feed slot is connected to the first annular groove and the second annular groove. The first feed conductor is disposed on the first surface corresponding to the first annular groove and the second annular groove, wherein the first feed conductor couples the ground element to feed an electric current. The second feed conductor is disposed on the first surface corresponding to the feed slot, wherein the second feed conductor couples the feed slot to feed a magnetic current.

Abstract: A concentric ring, log-periodic slot antenna used for direction finding is disclosed. There are a number of continuous, circular slots nested inside of each other. A cover over the slots cavities has excitation plates and conductors thereon. There are four excitation plates spaced ninety degrees apart over each circular slot, and the excitation plates of all slots in each ninety degree sector are electrically interconnected. A conductor from the interconnected excitation plates in each of the four sectors conducts received signals to a Butler matrix which processes the signals and provides Mode 0, Mode +1, Mode ?1, and Mode ? outputs. These Mode outputs are used to provide direction finding information for DF signal sorting, and they may be used to provide radio frequency voltages to other equipment to provide accurate DF (CIDF) and CIGL transmitter geo-location information.

Abstract: An ultra wideband antenna includes: a substrate; a grounding unit, installed on the substrate and scooped with a first slot and a first strip hole; a signal feeding unit, installed on the substrate and including a horizontal portion and a vertical portion, in which the horizontal portion is located in the first slot and the vertical portion is located in the first strip hole; a first complementary, separate, circular resonator; and a second complementary, separate, circular resonator, wherein the first complementary, separate, circular resonator and the second complementary, separate, circular resonator are installed in the horizontal portion of the signal feeding unit and are connected with each other.

Abstract: A microstrip antenna that can be linear, co-circular, or dual-circularly polarized having co-planar radiating elements and operating at dual frequency bands wherein an inner radiating element is surrounded by and spaced from an outer radiating element. Each radiating element resonates at a different frequency. In one embodiment of the invention a feed network has a single, cross-shaped, feed line that is positioned between the inner and outer radiating elements and capacitively coupled to the inner and outer radiating elements. In another embodiment of the present invention, the radiating elements are fed separately by first and second feed networks each having a plurality of feed points. The radiating elements each have one active feed point that is either directly or indirectly coupled to its respective feed network.

Abstract: One embodiment is a ring-slot radiator having: at least one radiating element having a characteristic of dual resonance, double-tuned in which an open ended strip and a cavity are structured to resonate at at least two different frequencies. Another embodiment may have: a ring-slot structure having at least one ring-slot opening on an infinite ground plane that forms a radiating element; a probe-fed strip structure that excites the slot; another ground plane underneath the strip; and a plurality of suppression elements around the ring slot to suppress parallel plate and surface wave modes.

Abstract: A broadband circularly polarized annular ring slot antenna is disclosed, which includes a substrate, an annular ring slot antenna portion located on the upper surface of the substrate, and a microstrip feeding portion located on the lower surface of the substrate. The annular ring slot antenna portion includes a grounding unit, an annular ring slot unit, a central metal unit, a first perturbation metal unit and a second perturbation metal unit. The first perturbation metal unit and the second perturbation metal unit are extended from the grounding unit, towards the central metal unit, respectively. The microstrip feeding portion includes a vertical feeding unit, a bent feeding unit and a rectangular microstrip unit.

Abstract: An antenna of the present disclosure has a housing having a shallow cavity in a top of the housing and a shallow cavity in a bottom of the housing. The antenna further has a substantially circular radiating element disposed in the shallow cavity on the top of the housing, the radiating element having an arc shape slot. In addition, the antenna has a substantially circular parasitic element disposed in the shallow cavity on the bottom of the housing.

Abstract: A new type of multihole antenna which is mainly suitable for mobile communications or in general to any other application where the integration of telecom systems or applications in a single antenna is important. The antenna includes a radiating element which at least includes one hole. By means of this configuration, the antenna provides a broadband and multiband performance, and hence it features a similar behaviour through different frequency bands. Also, the antenna features a smaller size with respect to other prior art antennas operating at the same frequency.

Abstract: The invention relates to an arrangement with a transponder (2) and a metal component (1) provided for the transponder (2). An antenna for the transponder (2) is formed by a recess (3) in the metal component (1).

Abstract: A coupling device is provided. The coupling device has a substrate, a ground element, a first feed conductor and a second feed conductor. The substrate has a first surface and a second surface. The ground element is disposed on the second surface, wherein the ground element has a first annular groove, a second annular groove and a feed slot, the second annular groove surrounds the first annular groove, the feed slot is connected to the first annular groove and the second annular groove. The first feed conductor is disposed on the first surface corresponding to the first annular groove and the second annular groove, wherein the first feed conductor couples the ground element to feed an electric current. The second feed conductor is disposed on the first surface corresponding to the feed slot, wherein the second feed conductor couples the feed slot to feed a magnetic current.

Abstract: The present invention relates to a transmission/reception antenna with diversity of radiation comprising on a substrate at least a first and a second radiating elements connected by a network of feeder lines to a transmission/reception circuit of electromagnetic signals, wherein the network is constituted by a first feeder line connected to a first radiating element and by a set of two second feeder lines each connected by means of a switching element to the second radiating element in such a manner as to supply the two radiating elements in phase or in phase opposition, the set of the two second feeder lines being connected to the first feeder line by a third feeder line, the first and third feeder lines being connected by a feeder line common to the transmission/reception circuit of electromagnetic signals.

Abstract: The invention relates to a planar antenna realised on a substrate comprising a slot of closed form dimensioned to operate at a given frequency in a short-circuit plane of at least one feed-line. The perimeter of the slot being designed such that p=k?s where k is a whole number greater than 1 and ?s the guided wavelength in the slot, the antenna comprising at least one first feed-line placed in an open circuit zone of the slot and a second feed-line placed at a distance d=(2n+1)?s/4 from the first line, where n is an integer greater than or equal to zero.

Abstract: The invention relates to a microstrip patch antenna (1) for mobile satellite communications comprising a first electrically conducting ground plane (4) having at least one opening (7), at least one patch radiating element (2), at least one first dielectric layer (L2) disposed between the first electrically conducting ground plane and the patch radiating element and more particularly between the at least one opening and the patch radiating element, at least one feed line (6) for providing signal energy in a contactless manner to or from the patch radiating element through the opening and a second dielectric layer (L3) disposed between the feed line and the first electrically conducting ground plane wherein the antenna further comprises a second ground plane (8) and a third dielectric layer (L4) disposed between the second ground plane and the feed line.

Abstract: A multiband base station antenna for communicating with a plurality of terrestrial mobile devices is described. The antenna including one or modules, each module including a low frequency ring element; and a high frequency dipole element superposed with the low frequency ring element. The element includes a ground plane; and a feed probe directed away from the ground plane and having a coupling part positioned proximate to the ring to enable the feed probe to electromagnetically couple with the ring. A dielectric clip provides a spacer between the feed probe and the ring, and also connects the ring to the ground plane. An antenna element is also described including a ring, and one or more feed probes extending from the ring, wherein the ring and feed probe(s) are formed from a unitary piece.

Abstract: The present invention relates to an antenna arrangement comprising a dielectric medium (2) with a first side (3) and a second side (4), with a feeding arrangement (6; 6?) on the first side and at least one slot (5; 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73) in a ground plane on the second side, where the feeding arrangement comprises at least a first (13; 13?; 37; 37?), a second (14; 14?; 38; 38?), a third (15; 15?; 41; 41?) and a fourth (16; 16?, 42; 42?) feeding conductor, each intersecting the gap of the slot (5; 62, 63, 64, 65; 66, 67, 68, 69, 70, 71, 72, 73), where each intersection constitute a feeding point (17, 18, 19, 20; 39, 40, 43, 44, 50, 51, 52, 53) for the antenna arrangement (1; 1?; 1?; 1??). In a first mode of operation, a first constant E-field (26) that is directed across the slot is obtained. In a second mode of operation, a second E-field (28) which is directed across the slot, having a sinusoidal variation is obtained.

Abstract: An antenna apparatus for use in a transmitter or a receiver in a communication system. The antenna apparatus includes: a dielectric substrate having a conductor layer on one of surfaces; and a slot antenna including an antenna electrode formed on the one surface and disposed substantially at the center, a grounded conductive surface surrounding the antenna electrode, and a slot transmission line made by a gap between the antenna electrode and the grounded conductive surface.

Abstract: A multi-band slot resonating ring antenna (SRRA) is suitable to be manufactured on a circuit board. A first conductive plane includes concentric slots corresponding to different frequency bands. The antenna may be fed by microstrip feed lines. The antenna may also be fed by probes. A conductive layer may include coupling apertures to couple signal energy to the concentric slots.

Abstract: A method and apparatus for transmitting utility meter data from an underground meter pit. The device includes a radiating antenna that is positioned entirely above the top surface of the pit lid. The radiating antenna conductively contacts a portion of the transmitter supported on the pit lid by the antenna housing. The transmitter housing includes an isolation sleeve that physically contacts a portion of the radiating antenna to enhance the signal transfer from the transmitter to the radiating antenna.

Abstract: A multiband base station antenna for communicating with a plurality of terrestrial mobile devices is described. The antenna including one or modules, each module including a low frequency ring element; and a high frequency dipole element superposed with the low frequency ring element. The element includes a ground plane; and a feed probe directed away from the ground plane and having a coupling part positioned proximate to the ring to enable the feed probe to electromagnetically couple with the ring. A dielectric clip provides a spacer between the feed probe and the ring, and also connects the ring to the ground plane. An antenna element is also described including a ring, and one or more feed probes extending from the ring, wherein the ring and feed probe(s) are formed from a unitary piece.

Abstract: The invention refers to a new type of multihole antenna which is mainly suitable for mobile communications or in general to any other application where the integration of telecom systems or applications in a single antenna is important. The antenna consists of a radiating element which at least includes one hole. By means of this configuration, the antenna provides a broadband and multiband performance, and hence it features a similar behaviour through different frequency bands. Also, the antenna features a smaller size with respect to other prior art antennas operating at the same frequency.

Abstract: The present invention relates to a planar antenna carried by a substrate comprising a slot in the form of a closed curve dimensioned to operate at a given frequency, supplied by a feeder line intersecting the slot at a point known as an excitation point, characterized in that at least two short circuits in parallel on the slot are positioned with respect to the excitation point so as to match the impedance to the excitation point and/or the polarization of the antenna.

Abstract: One embodiment is a ring-slot radiator having: at least one radiating element having a characteristic of dual resonance, double-tuned in which an open ended strip and a cavity are structured to resonate at at least two different frequencies. Another embodiment may have: a ring-slot structure having at least one ring-slot opening on an infinite ground plane that forms a radiating element; a probe-fed strip structure that excites the slot; another ground plane underneath the strip; and a plurality of suppression elements around the ring slot to suppress parallel plate and surface wave modes.

Abstract: A broadband antenna includes a radiation part (10) for radiating and receiving electromagnetic signals, a feed portion (30) for feeding the electromagnetic signals, and a pair of ground planes (40) respectively disposed on sides of the feed portion. The radiation part comprises an annular first radiation segment (12) and an annular second radiation segment (14) being inscribed within a space defined by the annular shape of the first radiation segment. The feed portion is electrically connected to the radiation part.

Abstract: A multi-band slot resonating ring antenna (SRRA) is suitable to be manufactured on a circuit board. A first conductive plane includes concentric slots corresponding to different frequency bands. The antenna may be fed by microstrip feed lines. The antenna may also be fed by probes. A conductive layer may include coupling apertures to couple signal energy to the concentric slots.

Abstract: The present invention by propagates a traveling wave of electric current along a microstrip antenna structure rather than a standing wave. By loading an antenna with a series of capacitive gaps of the correct values, the shape of the electric current distribution can be tailored to suppress the resonant properties of the antenna, specifically the standing wave of electric current that normally forms along the antenna structure. A microstrip antenna having a “bulls-eye target” structure comprised of a center disk and concentrically larger capacitively coupled annular sections will tailor the shape of the electric current distribution to achieve a suppression of the resonant properties of the antenna, thereby increasing the antenna bandwidth.

Abstract: A multiband base station antenna for communicating with a plurality of terrestrial mobile devices is described. The antenna including one or modules, each module including a low frequency ring element; and a high frequency dipole element superposed with the low frequency ring element. The element includes a ground plane; and a feed probe directed away from the ground plane and having a coupling part positioned proximate to the ring to enable the feed probe to electromagnetically couple with the ring. A dielectric clip provides a spacer between the feed probe and the ring, and also connects the ring to the ground plane. An antenna element is also described including a ring, and one or more feed probes extending from the ring, wherein the ring and feed probe(s) are formed from a unitary piece.

Abstract: A microstrip antenna comprises of an antenna element and a feed-in/feed-out element. Wherein, a wiring pattern of the antenna element includes a plurality of spiral inductors, so that in the antenna element, the path of the electric current is lengthened, the resonant frequency is lowered, and the length of the antenna is shortened.

Abstract: The present invention relates to a device for the reception and/or the transmission of electromagnetic signals comprising at least one means of reception and/or of transmission of electromagnetic signals, consisting of an antenna of the slot type and a feed line coupled electromagnetically with the slot of the antenna so as to connect the means of reception and/or of transmission of electromagnetic signals to means of utilization of the signals, the feed line being coupled electromagnetically with the slot at two points chosen such that the electromagnetic waves exhibit a circular polarization.

Abstract: A planar antenna has a radiating element and a ground plate. A body of a vehicle has an internal edge that is formed by making a hole in the body. The planar antenna is located in the hole so that an imaginary plane of the internal edge is located between the radiating element and the ground plate. In such a structure, electric lines of force perpendicularly pass through the body beside the planar antenna. As a result, electric fields are maintained in the vertical direction even if the planar antenna is mounted on the vehicle. This maintains a horizontal directivity of the planar antenna.

Abstract: A ring electrode is disposed in a ring shape opposite to a grounded electrode in a flat shape at a predetermined distance therefrom. A connection member is disposed which is made up of impedance converting portion and transmission line portion, connected in series with impedance converting portion, between the inner side of ring electrode and feeding terminal. Thus, an antenna apparatus easy to achieve impedance matching thereof by use of a connection member can be economically realized.

Abstract: A microstrip patch antenna is provided having a high gain performance with a smaller size compared to existing approaches. The antenna includes a patch having a polygon shape, such as a convex polygon, and a modified V-slot in the polygon patch including high-frequency control segments. Such an antenna has a dual band performance, such as in the Ka and Ku bands. An array of antenna elements is also described, as well as an ultra low profile phased array antenna system.

Abstract: A planar inverted F antenna includes a radiation portion to receive or transmit a radio signal, a short portion having one end connecting to the radiation portion to brace the radiation portion, a ground portion connecting to the short portion on another end, and a feed section located between the radiation portion and the ground portion, wherein the feed section has one end connecting to the radiation portion and another end directed towards the ground portion but not connected to the ground portion. The radiation portion, short portion, ground portion and feed section are formed in an integrated manner.

Abstract: The present invention relates to an ultra wideband internal antenna, which is provided in a mobile communication terminal to cut off frequencies in a certain frequency band while processing ultra wideband signals. The ultra wideband internal antenna includes a first radiation part, a second radiation part, a feeding part and a ground part. The first radiation part is made of a metal plate on a top surface of a dielectric substrate and is provided with at least one cut part, formed by cutting out a lower corner portion thereof, and an internal slot. The second radiation part is formed in the slot of the first radiation part while being connected to the first radiation part, the second radiation part being conductive. In this case, the first and second radiation parts form an ultra wide band due to electromagnetic coupling therebetween using individual currents flowing into the first and second radiation parts.

Abstract: A device, applicable to the field of wireless transmission, receives and/or transmits electromagnetic waves with radiation diversity. This device comprises, on a common substrate (3), at least one antenna of the slot type (1) formed by a closed curve, known as a slot antenna, electromagnetically coupled to a first supply line (6), and an antenna radiating parallel to the substrate (2), positioned inside the slot antenna and connected to a second supply line. The first and second supply lines are connected via a switching means to means to exploit the electromagnetic waves.

Abstract: The present invention relates to a multiband planar antenna comprising, on a substrate having a ground plane, at least a first slot dimensioned for operation at a first frequency and a second slot dimensioned for operation at a second frequency, the two slots having a closed shape and being excited by a common supply line. Furthermore, the slots are coupled to the supply line such that the coupling with the first slot is implemented in an electrical plane of the supply line of a first type and the coupling with the second slot is implemented in an electrical plane of the supply line of a second type, the supply line having, at its free end, a control element comprising two states allowing the type of electrical plane at the coupling points of the line with the first and second slots to be modified, the slots being positioned with respect to the supply line such that only one of them radiates for a given state of the control element.

Abstract: A phased array antenna structure capable of operation at millimeter-wave frequencies and having multiple ring slot radiator elements (10). The RF feed structure for each radiator element includes a feed via (28) extending part-way through a multi-layer structure (FIG. 3) on which the radiator elements (10) are formed and a strip line feed probe (30) extending from the via (28) toward the radiator element. A key feature facilitating high-frequency operation is the inclusion of multiple mode suppressors (32) surrounding the via (28) and providing a smooth transition from a coaxial mode of RF transmission to a strip line mode of RF transmission. The feed probe (30) is tailored to provide either a narrow-band or a wideband frequency characteristic.

Abstract: An antenna element is provided which responsive in multiple frequency bands, has symmetric beam patterns, and is easily and cheaply fabricated. The antenna element includes at least three conductive plates arranged in a stack At least one pair of adjacent plates contain apertures that are mutually aligned relative to the stacking direction. The antenna element further includes at least one air stripline arranged to create radiative electromagnetic excitations of the apertures when the stripline or striplines are energized by a suitable radiofrequency voltage source or sources.

Abstract: The invention relates to a dual-band planar antenna formed by at least one slot of closed shape fabricated on a printed substrate having a perimeter equal to k?f, and two supply lines supplying power to the slot via two accesses separated by (2m+1)?f/4, where ?f is the guided wavelength in the slot and k and m integers greater than 0, the slot comprising means modifying the operating frequency, one of the supply lines being situated on the said means. The invention is especially applicable to antennas used in domestic wireless networks (IEEE802-11a or Hyperlan 2 standards.

Abstract: An on-board antenna including a radiation element provided on a dielectric substrate, and a grounding conductor surrounding a periphery of an outer edge portion of the radiation element at a position spaced away outwardly from the outer edge portion, wherein the radiation element has an inner cut-out portion so that the surface of the dielectric substrate to be exposed therethrough.

Abstract: The invention concerns a device for receiving and/or transmitting signals comprising at least two wave reception and/or transmission means consisting of a slot antenna and means for connecting at least one of said reception and/or transmission means to means using multibeam signals. The connection means consist of a common feeder line, the line being electromagnetically coupled with the slots of the slot antenna and being terminated by an electronic component enabling through a control signal to simulate a short circuit or an open circuit at the end of said line so that, when the component is in on-state the radiation pattern derived from the device is different from the radiation pattern derived from the device when the component is in off-state. The invention is applicable to the field of wireless transmissions.

Abstract: The invention relates to a device for receiving and/or transmitting electromagnetic signals comprising three annular slots (20, 21, 22) which are tangent in pairs at two points P1 and P2. These slots are supplied by two supply lines (23, 24) so as to produce a line/slot transition. One of the lines 23 passes through the point P1 while the other line 24 passes through the point P2, the two lines being connected via a T-shaped junction at a common port 1. A diode 25 or 26 is mounted at the free end of each line, making it possible to simulate a short circuit or an open circuit at the end of one of the lines and an open circuit or a short circuit at the end of the other line.

Abstract: The present invention relates to a multiband planar antenna comprising a first slot 1a dimensioned (R1) to operate at a first frequency f1 and fed by a feed line 12 positioned (Im1) in such a way that the slot lies in a short-circuit plane of the feed line, and at least one second slot 11 dimensioned (R2) to operate at a second frequency f2, the second slot being fed by the said feed line (Im2).

Abstract: A compact disc coupled to a wireless communication device comprises the disc with a metalized outer portion, a wireless communication chip and a pair of tabs. The first tab may capacitively couple the wireless communication chip to the metalized portion of the disc. The second tab may be positioned in an inner portion of the disc with a gap delimited by the metalized portion and the second tab. A slot antenna is thus formed through which the wireless communication device may communicate. Wireless communication chip allows disc to be interrogated and identified for a variety of purposes, including, but not limited to security, advertising and promotion, and issuing of related coupons to customers for subsequent purchases.